10 results about "Phakic intraocular lens" patented technology

The present invention provides a phakic intraocular lens based on spatial filtering and a preparation method thereof. The phakic intraocular lens includes an optical body, and the optical body includes an optical surface and an optical surface with a spatial filtering structure. The spatial filtering structure satisfies a filtering function that can change the spatial spectrum of the imaging light beam to expand the depth of focus. The present invention regards the imaging process that is usually refracted by geometric optical rays as an imaging process of wavefront transformation, and by introducing an optical surface with a spatial filtering structure in the phakic intraocular lens as a filter, changing the filtering function of the filtering structure can change the spatial spectrum structure of the imaging light beam, achieving the effects of expanding the depth of focus, enhancing dynamic vision, and simultaneously correcting myopia and presbyopia; having a better visual effect. Moreover, it has strong tolerance to adverse effects such as decentration and tilt; and has a simple structure and good stability.

The invention relates to a phakic intraocular lens (1), comprising: - an optic (2) with an optical axis (100) that extends perpendicularly to a horizontal axis (110) and a vertical axis (120) of the intraocular lens (1) in plan view, wherein the horizontal axis (110) and vertical axis (120) are located in a tangential plane (130) to an optic upper side (3), wherein the optic (2) has a diameter (D) in plan view, - a haptic (10) connected to the optic (2) and consisting only of a first haptic body (11) and a second haptic body (16), wherein a vertical distance (a5) along the vertical axis (120) from the optical axis (100) to a first centre of mass (S1) of the first haptic body (11) is smaller than a vertical distance (a6) along the vertical axis (120) from the optical axis (100) to a second centre of mass (S2) of the second haptic body (16).

The invention relates to a method for controlling an ophthalmic surgical microscope (2) with an OCT device (3), the method having the following steps: • carrying out a first OCT scan (30), wherein the first OCT scan is carried out such that only a part of a phakic intraocular lens (26) implanted in the patient's eye (11) and only a part of an anterior capsular bag wall (19) of the patient's eye are captured in the first OCT scan (30), • determining a first absolute value (B1) of a first geometric parameter in the first OCT scan (30) by means of an image processing device (5), • carrying out a second OCT scan (33), wherein the second OCT scan is carried out such that only a part of a cornea (13) or sclera (21) and only a part of the iris (14) adjacent thereto are captured in the second OCT scan (33), • determining a second absolute value (B2) of a second geometric parameter in the second OCT scan (33) by means of the image processing device (5), • forming a first result (E1) by performing a mathematical operation on the first absolute value (B1) and a predetermined first base value (BA1) and forming a second result (E2) by performing a mathematical operation on the second absolute value (B2) and a predetermined second base value (BA2), wherein the first result (E1) and the second result (E2) are calculated by means of a calculation device (6), • outputting an output on the basis of the first result (E1) and the second result (E2) by means of an output device (7).

The present invention provides a device 1 that can reduce the risk of angle-to-angle narrowing after ICL (intraocular lens) implantation surgery. [Solution] The device 1 includes a calculation unit 5. The calculation unit 5 (acquisition unit) acquires at least the preoperative AOD (preoperative angle of view) from the patient before ICL insertion. The calculation unit 5 (calculation unit) calculates the vault threshold using the acquired preoperative AOD, based on a threshold calculation formula that calculates a pre-set vault threshold, which is an indicator of narrow angle, with preoperative AOD and vault (distance) as variables. Furthermore, the calculation unit 5 (selection unit) selects the ICL lens size by referring to the calculated vault threshold.

The present invention provides an intraocular lens with a crystalline lens that can maintain a stable vault height in the eye. The intraocular lens with a crystalline lens of the present invention has the following structure. The central thickness of the optical part of the intraocular lens with a crystalline lens is 0.05 to 0.25 mm, preferably 0.05 to 0.20 mm, and more preferably 0.08 to 0.18 mm; the edge thickness of the support part is 0.05 to 0.25 mm, preferably 0.05 to 0.20 mm, and more preferably 0.08 to 0.18 mm; the thickness of the thickest part is 0.1 to 0.8 mm, preferably 0.15 to 0.75 mm, and more preferably 0.15 to 0.70 mm. With the above structure, as described in the following embodiments and the like, through such a special size design, the intraocular lens with a crystalline lens of the present invention can maintain a stable vault height. It can enable the intraocular lens to maintain the vault height, prevent it from collapsing and deforming, and also prevent it from being too hard to cause damage to the intraocular tissues.

A phakic intraocular lens for the correction of complex astigmatism in keratoconus, containing an optical zone of the lens located on the optical axis of the lens, holes located on it for the circulation of intraocular fluid, a fixation zone around the optical zone, differs in that it additionally has an absolutely opaque disk placed in the optical center, in the center of which there is a hole. In addition, the lens with these elements is made of various biologically compatible materials by simultaneous molding.

The utility model discloses a phakic intraocular lens position adjusting device which comprises a mounting cylinder, a filling cylinder and a discharging cylinder are arranged in the mounting cylinder, a mounting plate is arranged on one side of the mounting cylinder, a plurality of clamping strips are fixedly connected to one side of the mounting plate, a plurality of clamping grooves are formed in the inner wall of the mounting cylinder, and the clamping strips are fixedly connected to the inner wall of the mounting cylinder. A filling pipe is arranged on one side of the filling cylinder, a discharging pipe is arranged on one side of the discharging cylinder, a supporting rod is fixedly connected to one side of the mounting cylinder, rotating blocks are rotationally connected to the two sides of the supporting rod, a position adjusting head is fixedly connected to one side of each rotating block, and an adjusting rope is fixedly connected to one side of each position adjusting head; and the upper end of the mounting cylinder is fixedly connected with a limiting plate. Clamping strips and clamping grooves are arranged, so that the mounting plate is convenient to disassemble, the first piston rod, the first piston, the second piston rod and the second piston are separated from the filling barrel and the discharging barrel, and then the filling barrel and the discharging barrel are cleaned.

The application provides a phakic intraocular lens, and relates to the technical field of medical devices. The phakic intraocular lens comprises an optical main body having a front surface and a non-spherical rear surface; a support part arranged around the optical main body; and a transition part arranged between the optical main body and the support part; the front surface and the rear surface of the transition part are connected with the front surface and the rear surface of the optical main body respectively, and the radius of curvature of the front surface of the transition part is greater than the radius of curvature of the rear surface of the transition part. The application can reduce the appearance of an aperture, improve imaging quality and stability, and improve safety after implantation and reduce the risk of intraocular lens jamming.

Phakic intraocular lens (1), comprising: - an optical body (2) with an optical axis (100) which is perpendicular to a horizontal axis (110) and vertical axis (120) of the intraocular lens (1) in the top view, wherein the horizontal axis (110) and vertical axis (120) lie in a tangent plane (130) to a top surface (3) of the optical body, wherein the optical body (2) has a diameter (D) in the top view, - a haptic element (10) connected to the optical body (2), which consists only of a first haptic body (11) and a second haptic body (16), wherein along the vertical axis (120) a vertical distance (a5) from the optical axis (100) to a first center of mass (S1) of the first haptic body (11) is smaller than a vertical distance (a6) along the vertical axis (120) from the optical axis (100) to a second center of mass (S2) of the second haptic body (16).