Ceskoslovenska Akademie Ved

Sarka Pitrova

Jiri Sulc

Zuzana Krcova

Karel Smetana

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 optical axis an inner part, e.g. a Fresnel lens, with a higher refractive index of light than has the surrounding part of the lens.

Soft intracameral lens

The invention pertains to a soft intracameral lens intended for location in the posterior chamber of the eye. The soft intracameral hydrogel lens has a front supporting and centering convex part intended for leaning against the iris having a rotational symmetrical shape of a sphere, paraboloid, or hyperboloid and passing into the broadest circumference by a surface, the shape of this surface being equal to or approaching the shape of the lateral area of a cone, while the hinder, or rear, supporting part of the lens has a spherical, planar, or moderately convex or concave-curved shape and a large surface area for leaning against a hinder capsula or a membrane of the vitreous body. The hinder supporting part is broadened and forms on its edge a retaining ring which reaches over the front part by as much as 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% 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 manufactured from a soft hydrogel. The lens may also contain inside, in its optical axis, an inner part, e.g., a Fresnel lens, having a higher refractive index of light than the material which surrounds the inner part of the lens.

Growing community of inventors

Prague, Czechia

Sarka Pitrova