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Marked accommodation, retinal stretch, monocular space perception and retinal receptor orientation.

J M Enoch

    American Journal of Optometry and Physiological Optics
    |June 1, 1975
    PubMed
    Summary

    Marked accommodation, or eye focusing, significantly alters photoreceptor alignment and visual direction perception. These findings highlight the impact of eye strain on retinal function and visual perception.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Visual Perception

    Background:

    • Retinal receptors are aligned with the eye's exit pupil.
    • Understanding factors influencing photoreceptor alignment is crucial.
    • The effect of retinal stretch from accommodation on alignment is under investigation.

    Purpose of the Study:

    • To investigate the impact of marked accommodation on photoreceptor alignment.
    • To determine if accommodation alters visual direction sense using a bisection test.
    • To evaluate the effect of anterior retinal stretch on foveal cone receptor orientation.

    Main Methods:

    • Classical monocular bisection test technique was employed.
    • Stiles-Crawford directional sensitivity function was measured.

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  • Studies involved marked accommodation and retinal stretch evaluation.

    • Main Results:

    • Substantial changes in bisection settings were observed in the posterior pole region.
    • Marked accommodation induced a transient nasal displacement of the Stiles-Crawford function peak.
    • The blind spot's presence influences the magnitude of measured parameter changes.

    Conclusions:

    • The posterior pole of the eye experiences routine stresses and strains.
    • Accommodation-induced retinal stretch affects visual perception and photoreceptor orientation.
    • Further research is needed to understand recovery processes after marked accommodation.