Sensitivity to S-Cone Stimuli and the Development of Myopia

Investigative Ophthalmology & Visual Science
Christopher Patrick TaylorR T Eskew

Abstract

Longitudinal chromatic aberration (LCA) is a color signal available to the emmetropization process that causes greater myopic defocus of short wavelengths than long wavelengths. We measured individual differences in chromatic sensitivity to explore the role LCA may play in the development of refractive error. Forty-four observers were tested psychophysically after passing color screening tests and a questionnaire for visual defects. Refraction was measured and only subjects with myopia or hyperopia without severe astigmatism participated. Psychophysical detection thresholds for 3 cyc/deg achromatic, L-, M-, and S-cone-isolating Gabor patches and low-frequency S-cone increment (S+) and decrement (S-) blobs were measured. Parametric Pearson correlations for refractive error versus threshold were calculated and nonparametric bootstrap 95% percentage confidence intervals (BCIs) for r were computed. S-cone Gabor detection thresholds were higher than achromatic, L-, and M-cone Gabors. S-cone Gabor thresholds were higher than either S+ or S- blobs. These results are consistent with studies using smaller samples of practiced observers. None of the thresholds for the Gabor stimuli were correlated with refractive error (RE). A negative c...Continue Reading

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Citations

Mar 1, 2019·Investigative Ophthalmology & Visual Science·David TroiloLyndon Jones
Jan 16, 2020·BMC Ophthalmology·Andrzej GrzybowskiSeang-Mei Saw
Nov 6, 2020·Experimental Eye Research·Nathaniel S WattsFrances J Rucker
Jul 9, 2021·Investigative Ophthalmology & Visual Science·Haiyan ZhengFang Hou
Aug 13, 2021·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Safal KhanalTimothy J Gawne
Aug 31, 2021·Translational Vision Science & Technology·Nina RiddellYuki Tani

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