Computer monitor pixellation and Sloan letter visual acuity measurement

ConclusionThe results show that grey‐scale filtering makes acuity measurement more resistant to the effects of pixellation. Based on a conservative interpretation of these findings, we make the recommendation that charts be constructed with, for filtered optotypes, a maximum pixel size of 0.6 x of the smallest MAR used and, for unfiltered optotypes, 0.35 x the smallest MAR used.

Source: Ophthalmic and Physiological Optics - December 27, 2017 Category: Opthalmology Authors: Andrew Carkeet, Lucas J. Lister Tags: Original Article Source Type: research