Enhancement of Night Vision by Correction of Optical Aberration of the Eye. Wide Angle Model of the Eye.
Abstract
The purpose of the research done under this grant was to enhance night vision by designing a special contact lens that would correct the off-axis aberrations that occur in eyes with widely dilated pupils. Improving the quality of the off-axis image focused on the retina, when the pupil is dilated to admit more light into the eye, would permit better vision in low-level illumination. We started by designing a wide angle model of the eye, based on data from statistical studies made elsewhere. The model was designed to represent an average emmetropic eye with parameters similar to those most frequently found in the normal population. A group of 100 emmetropic volunteers were selected and the parameters to be used in calculating the model were measured on their eyes. The data collected from volunteers showed us that our general model was not applicable to every emmetropic eye. Therefore, we classified the eyes into groups according to their parameters; we planned to develop special modifications of the model for each group. Before undertaking this redesign, we had to change our approach to the calculation of the basic model itself. The number of layers in the crystalline lens was increased indefinitely, their thicknesses becoming infinitely small. Thus the layers were transformed into isoindicial surfaces. This approach enabled us to condense the computer program and reduce the number of computations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1977
- Accession Number
- ADA095676
Entities
People
- Oleg Pomerantzeff
Organizations
- Smith-Kettlewell Eye Research Institute