Aspherical artificial lens capable of completely correcting mesopic vision

Abstract

The invention discloses an aspherical artificial lens capable of completely correcting mesopic vision. The surface shape of the front surface of an optical part of the aspherical artificial lens or the surface shape of the rear surface of the optical part is aspherical. A corneal spherical aberration range corrected by the aspherical artificial lens is -0.1 to -0.2 micron. Compared with an aspherical artificial lens sold in the market at present, the aspherical artificial lens capable of completely correcting mesopic vision is capable of completely correcting the common corneal spherical aberration of the mesopic vision; the influence of eccentricity and inclination of implantation of the artificial lens on the vision quality can be reduced, so that corresponding patients with cataract can obtain higher vision quality.

Description

Technical field [0001] The invention relates to a new type of aspherical intraocular lens (IOL) with complete correction of intermediate vision. Specifically, the present invention relates to an aspheric intraocular lens with a spherical aberration of approximately -0.1 to -0.2 μm, wherein the corresponding pupil diameter is 4.5 mm. . Background technique [0002] Cataract, as the main cause of blindness, has attracted more and more people's attention. As people age, the natural lens of the human eye will gradually become blurred, and even lose the ability to transmit light, and eventually cause the human eye to completely lose vision Features. [0003] The removal of the opaque human lens and the implantation of an intraocular lens is the best choice to restore human vision. Since 1949, the United Kingdom first used an intraocular lens made of hard PMMA material to successfully achieve lens replacement surgery, intraocular lens and corresponding Surgical technology has been dev...

AI Technical Summary

Problems solved by technology

[0006] However, the -0.27μm aspheric lens with negative spherical aberration is very sensitive to the eccentricity and tilt of the lens during implantation and postoperative healing. Even if the eccentricity is slight, the diffraction-limited characteristics of the aspheric lens will disappear, so this type of crystal actually has very high requirements for the accuracy and precision of the implant surgery

Zero spherical aberration (no spherical aberration) The crystal itself has no spherical aberration, and even when it is eccentric, it does not introduce coma, so it can effectively reduce the influence of crystal eccentricity and tilt on the imaging quality. However, the problem with this design is that due to The lens itself does not offset the positive spherical aberration of the cornea, which significantly limits the visual effect in the case of intermediate vision and scotopic vision

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