Glare reducing rough surfaces
View Patent ↗An intraocular lens for insertion into a capsular bag in order to focus incoming light toward a retina and process for manufacturing thereof along with concomitant reduced glare and improved vision provides for a center lens portion of a lens for focusing incoming light toward the retina and the surrounding lens portion for mounting the lens within the capsular bag. A surface roughness disposed on the surrounding lens portion is provided for reducing the glare due to non-focused light directed toward the retina from the intraocular lens with the roughness having a roughness level of between about Ra 45 and about Ra 350.
1. An intraocular lens, comprising:
a center lens portion for focusing incoming light toward the retina of an eye;
a surrounding lens portion having an anterior surface, a posterior surface, and a peripheral edge surface, said peripheral edge surface intersecting at least one of said anterior and posterior surfaces;
a glare-reducing rough surface disposed on the surrounding lens portion, the rough surface having a surface roughness level of about Ra 180 μin, the rough surface having a Gaussian distribution width sigma of at least 1 when illuminated by an incident light beam, and scattering data from the illuminated rough surface is fitted to a Gaussian distribution model, the incident light beam having a wavelength of 633 nanometers and illuminating the surface at a 55 degree incident light angle; and
at least one haptic coupled to the surrounding lens portion;
wherein the rough surface is disposed on the peripheral edge surface, and the center lens portion having no surface roughening applied thereto.
2. The lens according to claim 1 wherein the intraocular lens is made of a solid elastically deformable material selected from a group consisting of silicone, acrylic and hybrid materials.
3. The lens according to claim 1 wherein the surface roughness is disposed on anterior and posterior surfaces of the surrounding lens portion.
4. The process according to claim 1 wherein selected portions of the surrounding lens portion are roughened.