Shape discrimination thresholds among subjects with emmetropia and corrected myopia

Abstract

BACKGROUND: Myopia is highly prevalent in some Asian countries yet the ability of subjects with myopia to discriminate shapes using radial frequency (RF) patterns—circular patterns that are defined by sinusoidal modulation of the radius in polar coordinates—is not well documented. In this psychophysical study, we explore the relative ability of subjects with corrected myopia to discriminate shapes using radial frequency patterns. Specifically, the aims were to find if there are any differences in modulation detection thresholds among subjects with emmetropia and corrected myopia and to establish thresholds as a function of myopic refractive error. METHODS: Shape discrimination thresholds wer..