The Effect of Meridional and Overall Aniseikonic Corrections on Perceived Distortion Due to Small Astigmatic Correction:

Bitoric Spectacle Lenses

Abstract

A 35 year old male had been periodically prescribed a complete correction for his small amounts of astigmatic hyperopia. Compliance was unsuccessful due to the apparent tilting of the patient's visual surround­ings. Using measurements obtained on a new eikonometer called the Multi­meridional Apparent Frontoparallel Plane, bitoric lenses were prescribed and supplied. Aniseikonia and visual perception was evaluated with meridi­onal aniseikonia corrected and then with meridional and overall anisei­konia corrected. Only the latter gave the patient full satisfaction.