2002 Volume 7 Issue 2 Pages 239-246
The "Vergence Fusional Stereoscopic Limits (VFSLs)" of crossed and uncrossed binocular disparities in a stereoscopic display were measured to get the distributions of the VFSLs in a group of young subjects (392 subjects, aged 18-40 years, mean 21.4, S.D. 3.9) using a new autostereoscopic display and measuring system. Cumulative frequency ratios of model log normal distributions fitted to the data showed percentiles as follows: median 3.05, 84% percentile (-S.D.) 2.04 deg arc for uncrossed disparity; median -3.34, 84% percentile -1.84 deg arc for crossed disparity. Factors such as eye position (phoria) that might underlie individual differences, and also the relation with visual stress are discussed. These distribution data will be useful for designing stereoscopic images for comfortable viewing.
