Soft intracameral lens
US4994083A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1990 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | May 21, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0071
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention pertains to a soft intracameral lens determined for the location in the posterior chamber of eye. The soft intracameral hydrogel lens has its front supporting and centering convex part determined for leaning against iris having in front a rotation symmetrical shape of a sphere, paraboloid or hyperboloid and passing into the broadest circumference by a surface which shape is equal to or approaches a shape of lateral area of cone, while the hinder supporting part of the lens with a spherical, planar, or moderately convex or concave-curved shape for leaning against a hinder capsula or a membrane from vitreous body in a large surface area. The hinder supporting part is broadened and forms on the edge a retaining ring reaching over the front part as much as by 1.5 mm, whereas the central thickness of the lens ranges between 1 to 3.5 mm. The surface of the soft intracameral lens may be formed, at least in part, from a soft hydrogel containing at least 70% of water at 20.degree. C. in the state of equilibrium swelling. the lens may have a spherical shape and be provided on the circumference with a supporting collar from soft hydrogel. The lens may also contain inside in its …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.