The discriminability of spatial phase relationships in amblyopia

摘要: Previous work has shown that anomalies in the contrast sensitivity functions of amblyopes are often insufficient to explain degree visual deficit more complex tasks. Our stimuli were compound gratings composed a fundamental and its third harmonic, added either square-wave or triangle-wave phase. At medium high spatial frequencies we find many amblyopes, unlike normal observers, unable distinguish between such which have identical power spectra, but different phase spectra. In this frequency range they can, however, easily grating component alone. It seems amblyopia processing occurs over truncated than is implied by detection experiments. Various explanations observation considered.