Aphakia correction by synthetic intracorneal implantation: a new tool for quantitative predetermination of the optical quality.

To improve the a priori estimation of optical quality of synthetic intracorneal implantation, numerical calculations were performed involving the intraocular overpressure, the cleavage depth and the type of the implant. Optical correction ratios, that were determined, are in close agreement with the obtained mechanical effects.

Entropic contrast enhancement.

A technique for the contrast enhancement of a picture is proposed. The method is derived from the entropy concept of information theory. The originality of the algorithm rests on the use of a local contrast to define the digital entropy.

[Intra-corneal lens implantation: an experimental study in rabbits].

After the theoretical analysis, the authors describe the experimental results of hydrogel intracorneal lenses in the rabbit stroma.