A Comparison of Measurements of Critical Print Size and Maximum Reading Speed in Text Test Using Low Vision Simulator

Abstract

This study investigated the effects of stimulus presentation on CPS and MRS estimates based on viewing style and text measurement methods, aiming to evaluate consistency between CfPS and software-calculated CPS. Thirty-six subjects—12 normal-sighted, 12 low visual acuity, and 12 tunnel vision (with low vision simulation) were analyzed using non-parametric methods. Results showed no significant difference in CPS and MRS between descending and ascending series. CPS was significant between sighted and low vision groups, but MRS was not. CPS estimates and CfPS agreement ranged from fair to good. The ascending sequence method is promising for low vision simulators, unaffected by CPS and MRS estimation.