Intra ocular lens

摘要

The invention relates to a intra lens (1) comprising a posterior surface and an anterior surface, said posterior surface having a curvature which is optimized for providing a minimal spherical aberration, wherein said curvature is optimized using the posterior chamber depth of an eye in which the IOL is to be inserted.

主权项

1. An intra ocular lens (IOL) comprising:
an anterior surface and a posterior surface, said posterior surface having a curvature defined as or equivalent toz=r2/R21+1-(1+k)⁢r2/R2, withk=n2⁢R3n12⁢(1R-1PCD)2⁢(n1+n2PCD-n2R)+8⁢⁢R3n1-n2⁢σ, in which equations the used parameters are k=−e2 conic constant, R Radius of curvature, r radial distance from optical axis, z height or sagitta of refracting surface, n1 refractive index of the material of the IOL, n2 refractive index of the vitreous body of the eye, PCD Posterior chamber depth, and σ Coefficient specifying additional spherical aberration to have a specified amount of spherical aberration.