Corneal contact lens based on shape memory material

Abstract

The invention provides a corneal contact lens based on a shape memory material, and relates to the technical field of corneal contact lenses, the corneal contact lens comprises an annular controller, a stress sensor, a lens and a heating unit; the lenses and the stress sensors are arranged at intervals and are fixed on the inner wall of the annular controller; the heating unit and the stress sensor are respectively in communication connection with the annular controller; the preparation material of the lens comprises a shape memory polymer; the heating unit is used for heating the lenses, the lenses can be switched between a first shape and a second shape through heating, when the lenses are in the first shape, the lenses are used for correcting myopia, and when the lenses are in the second shape, the lenses are used for correcting presbyopia. By means of the cornea contact lens, different requirements of patients suffering from myopia and presbyopia at the same time for seeing the near position and the far position can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of corneal contact lenses, and in particular to a corneal contact lens based on shape memory material. Background Art

[0002] Myopia refers to blurry vision of distant objects and clear vision of nearby objects. This is caused by the eyeball being too long or the cornea being too curved, which causes light to focus in front of the retina. Presbyopia, a condition characterized by the gradual loss of elasticity and accommodation of the eye's lens with aging, leads to blurry vision of nearby objects. This condition is typically more common in people over 40. Therefore, a person may suffer from myopia in their youth, and as they age, they may also develop presbyopia due to a weakening of their eye's accommodation ability. This may necessitate glasses for distant vision and reading glasses for nearby objects. Contact lenses, also known as contact lenses or contact lenses, are lenses worn on the cornea to correct vision or protect the eyes. However, existing contact lenses offer a single corrective function: a single pair of contact lenses is suitable for correcting only myopia or presbyopia, failing to meet the diverse vision needs of patients with both myopia and presbyopia. Summary of the Invention

[0003] The problem solved by the present invention is that the existing corneal contact lenses have a single correction function and cannot meet the different needs of patients with myopia and presbyopia when seeing near and far.

[0004] To solve the above problems, the present invention provides a corneal contact lens based on shape memory material, comprising an annular controller, a stress sensor, a lens and a heating unit; the lens and the stress sensor are spaced apart and fixed on the inner wall of the annular controller; the heating unit and the stress sensor are respectively communicated with the annular controller; the preparation material of the lens comprises a shape memory polymer; the heating unit is used to heat the lens, and the lens can switch between a first shape and a second shape by heating, and when the lens is in the first shape, it is used to correct myopia, and when the lens is in the second shape, it is used to correct presbyopia.

[0005] Optionally, the stress sensor includes a flexible transparent substrate and a piezoelectric sensor disposed on the flexible substrate.

[0006] Optionally, the piezoelectric sensor includes an inner layer, a middle layer and an outer layer.

[0007] Optionally, the middle layer is a paper-cut structure, and the end surfaces of the inner layer or the outer layer in contact with the middle layer are respectively provided with microstructures distributed in an array.

[0008] Optionally, the preparation method of the lens material includes: synthesizing macromonomer polymerization of polyethylene glycol diacrylate and polytetrahydrofuran diacrylate through an esterification reaction, and then polymerizing polyethylene glycol diacrylate and polytetrahydrofuran diacrylate as monomers to form a polymer network.

[0009] Optionally, the preparation method of the lens material includes:

[0010] (1) Dissolve acrylic acid, N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride, and 4-dimethylaminopyridine in dichloromethane, stir under an argon atmosphere, and cool in an ice bath to obtain a first mixed solution;

[0011] (2) Dissolve polyethylene glycol in dichloromethane to obtain a second mixed solution, and dropwise add the second mixed solution into the first mixed solution in (1) and stir evenly to obtain a third mixed solution;

[0012] (3) Concentrate the third mixed solution, then dilute it with chloroform, wash the resulting solution once with brine, twice with hydrochloric acid solution, once with sodium hydroxide solution, and twice with funnel and deionized water;

[0013] (4) Dry the organic layer overnight under anhydrous magnesium sulfate and filter. Concentrate and dry the filtered filtrate at room temperature to obtain purified polyethylene glycol diacrylate;

[0014] (5) Dissolve polyethylene glycol diacrylate, polytetrahydrofuran diacrylate, and crosslinker pentaerythritol tetra(3-mercaptopropionate) in chloroform; add benzoin dimethyl ether to the solution, and then perform ultrasonic treatment. Inject the resulting uniform solution into a mold under an argon atmosphere and irradiate it with ultraviolet light, and dry it under vacuum conditions at room temperature.

[0015] Optionally, in the step (2), the stirring time is 25 min to 35 min, the stirring temperature is 40 °C to 45 °C, and the stirring time is 24 h; in the step (5), the irradiation time of the ultraviolet light is 2 h.

[0016] Optionally, the lens material has triple shape memory properties.

[0017] Optionally, the heating unit is a microchip heater with a thickness of 200 nm, and is communicatively connected to the ring-shaped controller via Bluetooth.

[0018] Optionally, the heating unit and the stress sensor (3) are respectively communicatively connected to the ring-shaped controller (2) via Bluetooth.

[0019] Compared with the prior art, when the contact lens based on shape memory material provided by the present invention is in use, the contact lens is worn properly, the annular controller is sleeved on the eyeball, and the stress sensor is in contact with the cornea. When observing objects at different distances, the stress change generated by the ciliary muscle of the eyeball is transmitted to the cornea through the intraocular fluid, and then acts on the stress sensor. The stress sensor feeds back the detected stress to the annular controller. When the detected stress value meets the preset requirements, the annular controller activates the heating unit to heat the lens. Since the lens is made of shape memory material, the lens can switch between a first shape and a second shape, so that the lens can switch between the two requirements of seeing near and seeing far. By using the contact lens of the present invention, the different needs of patients suffering from both myopia and presbyopia symptoms when seeing near and seeing far can be met. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the contact lens based on shape memory material in an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the contact lens based on shape memory material (without the stress sensor) in an embodiment of the present invention;

[0022] Figure 3 It is one of the schematic structural diagrams of the stress sensor in an embodiment of the present invention;

[0023] Figure 4 It is another schematic structural diagram of the stress sensor in an embodiment of the present invention;

[0024] Figure 5 It is one of the paper-cut models adopted for the intermediate layer in an embodiment of the present invention;

[0025] Figure 6 It is another paper-cut model adopted for the intermediate layer in an embodiment of the present invention;

[0026] Figure 7 It is the third paper-cut model adopted for the intermediate layer in an embodiment of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the inner layer or the outer layer of the annular stress sensor in an embodiment of the present invention.

[0028] Description of the Reference Numerals:

[0029] 1. Lens; 2. Annular controller; 3. Stress sensor; 31. Flexible transparent substrate; 32. Piezoelectric sensor. Detailed Embodiments

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of specific embodiments of the present invention with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. Instead, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application;

[0032] The term "including" and its variations used herein are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0033] Such as Figure 1 And Figure 2As shown in the figure, a contact lens based on shape memory material provided by an embodiment of the present invention includes an annular controller 2, a stress sensor 3, a lens 1, and a heating unit (not shown in the figure); the lens 1 and the stress sensor 3 are arranged at intervals and are both fixed on the inner wall of the annular controller 2; the heating unit and the stress sensor 3 are respectively communicatively connected to the annular controller 2; the preparation material of the lens 1 includes a shape memory polymer; the heating unit is used to heat the lens 1, and the lens 1 can be switched between a first shape and a second shape by heating. When the lens 1 is in the first shape, it is used to correct myopia, and when the lens 1 is in the second shape, it is used to correct presbyopia. It should be noted that the heating unit is used to heat the lens 1. Since the volume of the entire contact lens is small, arranging the heating unit on the annular controller 2 can also achieve heating of the lens 1. During use, the stress sensor is in direct contact with the cornea. Compared with the stress sensor, the lens is closer to the outside of the eye. It should be noted that the shape memory polymer has the following characteristics: at room temperature, the material has a high modulus. When the temperature of the material is raised above the glass transition temperature (Tg) of the material, the modulus of the material decreases, and it can be shaped into a temporary shape and still maintain this shape after the temperature is lowered below the glass transition temperature (Tg) of the material. When the temperature of the material is raised above the glass transition temperature (Tg), the material can return to its initial shape. In addition, the shape memory polymer can also switch shapes under other external stimuli, such as magnetic and optical signals.

[0034] It should be noted that when the patient looks at a distant scene, the ciliary muscle inside the eyeball will be in a relaxed state, so that the lens focuses the focus of the line of sight on the distant scene. At this time, the stress transmitted from the ciliary muscle of the eyeball to the stress sensor is small; when the patient looks at a nearby scene, the ciliary muscle inside the eyeball will be in a contracted state, so that the lens thickens, the refractive power increases, and the focus of the line of sight is focused on the nearby. At this time, the stress transmitted from the ciliary muscle of the eyeball to the stress sensor is large.

[0035] The contact lens based on shape memory material provided by the embodiment of the present invention, when in use, wears the contact lens well, sleeving the annular controller 2 on the eyeball, and making the stress sensor 3 contact with the cornea. Assuming that the lens 1 is in the first shape, i.e., the concave lens shape, in the initial state, the lens 1 can meet the need for observing distant objects at this time. When observing nearby objects is required, as the wearer's line of sight changes from far to near, the stress transmitted by the ciliary muscle of the eyeball to the stress sensor 3 gradually increases. The stress sensor 3 feeds back the detected stress to the annular controller. When the detected stress value is greater than the first preset value (the stress transmitted by the ciliary muscle of the eyeball to the stress sensor when observing at a distance of 1.5 m), the annular controller 2 activates the heating unit to heat the lens 1, and the lens 1 changes from the first shape to the temporary shape. At this time, the lens 1 can meet the need for observing slightly closer objects; when observing even closer objects is required again, as the wearer's line of sight gets closer, the stress transmitted by the ciliary muscle of the eyeball to the stress sensor gradually increases. The stress sensor feeds back the detected stress to the annular controller 2. When the detected stress value is greater than the second preset value (the stress transmitted by the ciliary muscle of the eyeball to the stress sensor when observing at a distance of 30 cm), the annular controller 2 activates the heating unit to heat the lens 1, and the lens 1 changes from the temporary shape to the second shape. At this time, the lens 1 can meet the need for observing nearby objects; when observing distant objects is required again, as the wearer's line of sight changes from near to far, the stress transmitted by the ciliary muscle of the eyeball to the stress sensor gradually decreases. The stress sensor feeds back the detected stress to the annular controller 2. When the detected stress value is less than the preset value, the annular controller 2 activates the heating unit to heat the lens 1, and the lens 1 changes from the second shape to the first shape. At this time, the lens 1 can meet the need for observing distant objects again. It can be seen that using the contact lens of the embodiment of the present invention can meet the different needs of patients with both myopia and presbyopia symptoms when looking at near and far objects.

[0036] In some embodiments of the present invention, such as Figure 3 and Figure 4 shown, the stress sensor 3 includes a flexible transparent substrate 31 and a piezoelectric sensor 32 disposed on the flexible substrate. The piezoelectric sensor 32 is located on the side of the flexible transparent substrate away from the eyeball. When in use, the flexible transparent substrate 31 contacts the cornea. When the stress generated by the ciliary muscle of the eyeball changes, the flexible transparent substrate 31 will undergo corresponding deformation, and then act on the piezoelectric sensor 32. The piezoelectric sensor 32 outputs a corresponding electrical signal, thereby realizing the detection of the stress generated by the ciliary muscle of the eyeball.

[0037] In some embodiments of the present invention, preferably, based on inside and outside of the eye, the piezoelectric sensor 32 includes an inner layer, a middle layer, and an outer layer from the inside to the outside. The inner layer, the middle layer, and the outer layer are all made of piezoelectric materials. The middle layer is a paper-cut structure, and the paper-cut model can adopt such as Figures 5-7Structure; the structures of the inner layer and the outer layer are the same, such as Figure 8 As shown, pyramid structures distributed in an array are respectively provided on the end faces where the inner layer or the outer layer contacts the intermediate layer. When in use, when the transparent flexible substrate 31 deforms, it will drive the piezoelectric sensor 32 to deform, thereby generating a voltage difference between the end faces of the inner layer and the outer layer of the piezoelectric sensor 32. According to the magnitude of the voltage difference, the corresponding stress value can be obtained. In this embodiment, the pyramid structures distributed in an array on the inner layer and the outer layer cooperate with the intermediate layer of the paper-cut structure, making the piezoelectric sensor have better detection sensitivity, improving the sensitivity of the stress sensor 2 while enabling it to have good ductility.

[0038] In some embodiments of the present invention, preferably, the preparation method of the lens material includes: synthesizing macromonomers of polyethylene glycol diacrylate and polytetrahydrofuran diacrylate through an esterification reaction, and then polymerizing to form a polymer network with polyethylene glycol diacrylate and polytetrahydrofuran diacrylate as monomers..

[0039] Exemplarily, in some embodiments of the present invention, the preparation method of the lens is as follows:

[0040] 1. Synthesis of macromonomers:

[0041] Synthesize polyethylene glycol diacrylate (PEGDA) and polytetrahydrofuran diacrylate (PTHFDA) as macromonomers through an esterification reaction to form a polymer network.

[0042] 2. Synthesis of PEGDA

[0043] (1) By weight, in a 250 mL single-necked culture flask, dissolve 34 parts of acrylic acid, 95 parts of N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride, and 100 parts of 4-dimethylaminopyridine in 1325 parts of dichloromethane. Stir the solution under an argon atmosphere and cool it in an ice bath.

[0044] (2) By weight, dissolve 610 parts of PEG4k in 2650 parts of dichloromethane (PEG4k-DCM), and drop the PEG4k-DCM solution into the mixed solution in (1) drop by drop for 25 - 35 minutes. After adding, remove the ice bath and stir the reaction mixture at 40°C - 45°C for 24 h.

[0045] (3) Concentrate the reaction mixture, and then dilute it with chloroform. Wash the obtained solution once with brine, twice with 1 mol / L hydrochloric acid solution, once with 5 wt% sodium hydroxide solution, and twice with funnel and deionized water.

[0046] (4) The organic layer was dried overnight over anhydrous magnesium sulfate and filtered. The filtrate after filtration was concentrated and dried at room temperature to obtain purified PEGDA.

[0047] 3. Synthesis of PTHFDA

[0048] (1) By weight, in a 250 mL single-necked culture flask, 35 parts of acrylic acid, 92 parts of N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride, and 100 parts of 4-dimethylaminopyridine were dissolved in 1325 parts of dichloromethane. The solution was stirred under an argon atmosphere and cooled in an ice bath.

[0049] (2) By weight, 620 parts of PTHF 2.9k was dissolved in 2650 parts of dichloromethane (PTHF 2.9k-DCM), and the PTHF 2.9k-DCM solution was added dropwise to the mixed solution in (1) over 25 - 35 minutes. After addition, the ice bath was removed, and the reaction mixture was stirred at 40°C - 45°C for 24 h.

[0050] (3) The reaction mixture was concentrated and then diluted with chloroform. The resulting solution was washed once with brine, twice with 1 mol / L hydrochloric acid solution, once with 5 wt% sodium hydroxide solution, and twice with deionized water using a funnel.

[0051] (4) The organic layer was dried overnight over anhydrous magnesium sulfate and filtered. The filtrate after filtration was concentrated and dried at room temperature to obtain purified PTHFDA.

[0052] 4. Preparation of the polymer network:

[0053] PEGDA, PTHFDA, and the crosslinker pentaerythritol tetra(3-mercaptopropionate) were dissolved in chloroform. 1.0 wt% benzoin dimethyl ether was added to the solution, and then ultrasonic treatment was carried out. The resulting homogeneous solution was injected into a mold (lens mold with refractive powers of 0 / -1.00 / -2.00 / -3.00 / -4.00 / -5.00) under an argon atmosphere and irradiated with ultraviolet light at 365 nm for 2 h. Then the lens material was completely dried under vacuum at room temperature.

[0054] In some embodiments of the present invention, the material of the lens 1 has a triple shape memory effect, and each memory process can maintain a good shape fixation rate and shape recovery rate.

[0055] In some embodiments of the present invention, the side of the lens 1 in contact with the eyeball is coated with a packaging layer, and the material of the packaging layer is polydimethylsiloxane. The packaging layer can prevent the lens 1 from directly contacting the eyeball.

[0056] Exemplarily, in some embodiments of the present invention, the preparation method of the piezoelectric sensor is as follows:

[0057] 1. Preparation of Ti3C2Tx-M

[0058] Ti3C2Tx-M was prepared by the mixed acid method.

[0059] 1) Hydrofluoric acid, hydrochloric acid and deionized water were mixed at a volume ratio of 1:9:9.

[0060] 2) By weight, 3 parts of Ti3AlC2-MAX phase were slowly added to 100 parts of the mixture, stirred at 35 °C for 24 h, and centrifugally washed with deionized water until the pH of the supernatant was close to 6.

[0061] 3) By weight, the sediment was added to 40 parts of water, 3 parts of lithium chloride were added, and the mixture was stirred at room temperature for 24 h. Subsequently, it was centrifugally washed twice, shaken vigorously to stratify the solution, and the supernatant was collected by centrifugation (3500 rpm, 10 min) to obtain Ti3C2Tx-M, which was diluted to a concentration of 1 mg / mL.

[0062] 2. Preparation of the intermediate layer:

[0063] 1) Poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) was dissolved in dimethylformamide (DMF) to form a viscous solution with a concentration of 0.1 g / mL.

[0064] 2) The viscous solution was spin-coated on a clean glass substrate and dried at 90 °C for 10 minutes to obtain a P(VDF-TrFE) film on the glass substrate.

[0065] 3) Lithography treatment of the sacrificial photoresist layer was carried out on the glass substrate according to the paper-cut structure.

[0066] 4) MXene was evenly sprayed on the top of the remaining resist, and the resist was cleaned with plasma to improve its hydrophilicity. During the spraying process, the glass substrate was heated with a constant temperature heater and maintained at 55 °C. The distance between the spray gun and the glass substrate was 20 cm, and the pressure was 0.15 MPa.

[0067] 5) The mask was removed with ethanol to obtain a patterned MXene electrode layer.

[0068] 3. Preparation of the upper and lower electrode layers:

[0069] 1) By weight, 12 parts of thermoplastic polyurethane, 14 parts of polyvinyl alcohol, 2 parts of polyethylene glycol, and 400 parts of dimethyl sulfoxide were taken and added to a reagent bottle.

[0070] 2) The reagent bottle was placed in an oil bath, the temperature was adjusted to 75 °C, and it was continuously stirred and heated for 3 hours.

[0071] 3) Weigh the corresponding raw material components by weight. Take 30 parts of graphene oxide dispersion with a mass concentration of 10 mg / g and 100 parts of dimethyl sulfoxide, and add them to a beaker.

[0072] 4) Place the beaker in an ultrasonic cleaner and ultrasonically disperse for 1 hour.

[0073] 5) Add the well-dispersed graphene oxide dispersion to a reagent bottle and continue heating and stirring.

[0074] 6) Obtain the liquid flexible sensor surface composite material through the above steps.

[0075] Spin-coat the electrode with a polydimethylsiloxane layer and dry it at 90 °C for 1 h. Finally, place the peeled device in a metal mold and hold it at 160 °C for 1 h to obtain MX-SNR.

[0076] Among them, the electrode thickness is only 50 nm, which is encapsulated in an MX-SNR sensor with a diameter of 14 mm and a curvature radius of 8.4 mm.

[0077] In some embodiments of the present invention, the heating unit and the stress sensor 3 are respectively connected to the annular controller 2 through Bluetooth communication. Exemplarily, the controller is a single-chip microcomputer controller.

[0078] In some embodiments of the present invention, the heating unit is a microchip heater. The microchip heater is a tiny resistance element integrated on a semiconductor chip, which generates heat by applying current. The microchip heater has a very small volume and is suitable for precise heating control. The chip unit thickness can reach 200 nm, the sample unit is a pit array, the pit diameter is 3 μm, and the pit thickness is 50 nm, ensuring transparency.

[0079] In some embodiments of the present invention, the heating unit is a Peltier effect heater. The Peltier effect heater uses thermoelectric materials (such as bismuth telluride compounds) to achieve heating or cooling through the Peltier effect. The Peltier effect heater can achieve rapid heating and cooling.

[0080] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A contact lens based on shape memory material, characterized in that, It includes an annular controller (2), a stress sensor (3), a lens (1), and a heating unit; the lens (1) and the stress sensor (3) are arranged at intervals and are both fixed on the inner wall of the annular controller (2); the heating unit and the stress sensor (3) are respectively communicatively connected to the annular controller (2); the preparation material of the lens (1) includes a shape memory polymer; the heating unit is used to heat the lens (1), and the lens (1) can switch between a first shape and a second shape through heating. When the lens (1) is in the first shape, it is used to correct myopia, and when the lens (1) is in the second shape, it is used to correct presbyopia.

2. The contact lens based on shape memory material according to claim 1, wherein The stress sensor (3) includes a flexible transparent substrate (31) and a piezoelectric sensor (32) arranged on the flexible substrate.

3. The corneal contact lens based on a shape memory material according to claim 1, wherein The piezoelectric sensor includes an inner layer, a middle layer, and an outer layer.

4. The contact lens based on shape memory material according to claim 1, wherein The middle layer is a paper-cut structure, and microstructures arranged in an array are respectively provided on the end faces of the inner layer or the outer layer in contact with the middle layer.

5. The contact lens based on shape memory material according to claim 1, characterized in that, The preparation method of the lens material includes: synthesizing macromonomers of polyethylene glycol diacrylate and polytetrahydrofuran diacrylate through an esterification reaction, and then polymerizing polyethylene glycol diacrylate and polytetrahydrofuran diacrylate as monomers to form a polymer network.

6. The contact lens based on shape memory material according to claim 1, wherein The preparation method of the lens material includes: (1) Dissolve acrylic acid, N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride, and 4-dimethylaminopyridine in dichloromethane, stir under an argon atmosphere, and cool in an ice bath to obtain a first mixed solution; (2) Dissolve polyethylene glycol in dichloromethane to obtain a second mixed solution, and dropwise add the second mixed solution into the first mixed solution in (1) and stir evenly to obtain a third mixed solution; (3) Concentrate the third mixed solution, then dilute it with chloroform, wash the obtained solution once with brine, twice with hydrochloric acid solution, once with sodium hydroxide solution, and twice with a funnel and deionized water; (4) Dry the organic layer overnight under anhydrous magnesium sulfate and filter. Concentrate and dry the filtered filtrate at room temperature to obtain purified polyethylene glycol diacrylate; (5) Dissolve polyethylene glycol diacrylate, polytetrahydrofuran diacrylate, and a crosslinking agent pentaerythritol tetra(3-mercaptopropionate) in chloroform; add benzoin dimethyl ether to the solution, and then perform ultrasonic treatment. Inject the obtained uniform solution into a mold under an argon atmosphere, and irradiate it with ultraviolet light and dry it under vacuum conditions at room temperature.

7. The contact lens based on shape memory material according to claim 6, wherein In the step (2), the stirring time is 25 min to 35 min, the stirring temperature is 40 °C to 45 °C, and the stirring time is 24 h; in the step (5), the irradiation time of the ultraviolet light is 2 h.

8. The contact lens based on a shape memory material according to claim 1, wherein The lens material has triple shape memory characteristics.

9. The contact lens based on shape memory material according to claim 1, characterized in that, The heating unit is a microchip heater with a thickness of 200 nm.

10. The contact lens based on a shape memory material according to claim 1, characterized in that, The heating unit and the stress sensor (3) are respectively communicatively connected to the annular controller (2) through Bluetooth.

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