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; and
a rough surface disposed on the surrounding lens portion for reducing glare due to non-focused light directed toward the retina from said intraocular lens, 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;
wherein said surrounding lens portion includes a peripheral edge surface intersecting at least one of an anterior and a posterior surface to form a corner therebetween, the corner and the center lens portion having no surface roughening applied thereto, the surface roughness being disposed on one or more of the anterior and posterior surfaces.
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.
5. The lens according to claim 1 further comprising at least one haptic coupled to the surrounding lens portion.
6. An intraocular lens, comprising:
a center lens portion for focusing incoming light toward the retina of an eye;
a surrounding lens portion; and
a rough surface only disposed on the surrounding lens portion for reducing glare due to non-focused light directed toward the retina from said intraocular lens, 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;
wherein said surrounding lens portion includes a peripheral edge surface intersecting at least one of an anterior and a posterior surface to form a corner therebetween, the corner having no surface roughening applied thereto, the surface roughness being disposed on one or more of the anterior and posterior surfaces.