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3D grating optics of human vision.

N Lauinger

    Acta Ophthalmologica. Supplement
    |January 1, 1991
    PubMed
    Summary

    Human retinal photoreceptor cells function as 3D gratings, processing light via Fresnel interference to generate color signals. This optical mechanism precedes neuronal processing in early color vision.

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    Area of Science:

    • Optics
    • Biophysics
    • Neuroscience

    Background:

    • The human retina's outer nuclear layer contains photoreceptor cell bodies.
    • These cells are arranged in approximately 6-7 layers, exhibiting closest packing.
    • Existing models of vision primarily focus on geometrical optics and neuronal processing.

    Purpose of the Study:

    • To propose a novel interpretation of photoreceptor cell structure and function.
    • To elucidate the physical optics underlying early color vision.
    • To explore the implications of a 3D grating model for visual perception.

    Main Methods:

    • Analysis of photoreceptor cell body arrangement as hexagonal multilayer 3D gratings.
    • Application of Fresnel interference principles to light processing within these gratings.
    • Mathematical modeling of light-grating interactions to derive color signals.

    Main Results:

    • Photoreceptor cell bodies act as 3D gratings, processing light through Fresnel interference.
    • This optical process generates triplets of chromatic interference maxima at specific wavelengths (559/537/447 nm).
    • The model explains the Purkinje shift and mathematically links color perception to light speed and 3D geometry.

    Conclusions:

    • Early color vision is based on 3D grating optics, not solely geometrical optics or neuronal networks.
    • The photoreceptor's chemical programming (visual pigments) may be based on 3D grating optics.
    • The eye acts as a trichromatic Fresnel-optical modulator, processing more visual information than relayed to the brain.

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