There was no statistically significant difference in mean visual acuity or mean spherical equivalent refraction in low vision patients when measured by instant vision assessment device vs. subjective refraction, according to a study.
In a cross-sectional study of low vision and normal vision individuals published in Clinical and Experimental Optometry, Desmond Cheng, OD, MSc, PhD, of the School of Optometry at Hong Kong Polytechnic University, and colleague found that at least 80% of refraction components measured with an instant vision assessment device were within 0.50 D of subjective