Experimental Model of Far Temporal Field Negative Dysphotopsia Generated in Phakic Eyes.

ABSTRACT:

Purpose

The axial separation between the iris and the intraocular lens (IOL) in pseudophakic eyes can cause rays originating from the far temporal field to miss the IOL, resulting in negative dysphotopsia (ND). We developed an experimental model to test the hypothesis that obstruction of rays from the far temporal field can generate ND and an accompanying loss of visual sensitivity in the far temporal field.

Methods

The right eyes of 10 phakic subjects were fitted with soft contact lenses containing a 5.50-mm central clear zone and a 12-mm outer diameter opaque annulus. In three of the subjects, eyes were dilated with 1% tropicamide solution, and effective aperture diameters were determined optically (pupil camera) and psychophysically (narrow beam detection). Visual field e

SUBMITTER: Ramasubramanian V 

PROVIDER: S-EPMC7405810 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature