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Accommodation to stimuli in peripheral vision.

Y C Gu, G E Legge

    Journal of the Optical Society of America. A, Optics and Image Science
    |August 1, 1987
    PubMed
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    Peripheral vision can elicit accommodation responses, but the magnitude decreases with eccentricity. This study measured accommodation for targets from 1 to 30 degrees, finding a decline from 4 D to 1-2 D.

    Area of Science:

    • Ophthalmology
    • Vision Science
    • Physiological Optics

    Background:

    • Accommodation is the eye's ability to change focus.
    • Peripheral vision's role in accommodation is not fully understood.
    • Understanding accommodation in peripheral vision is crucial for visual function.

    Purpose of the Study:

    • To investigate if targets in peripheral vision can elicit accommodation responses.
    • To quantify the magnitude of accommodation at various retinal eccentricities.
    • To explore the relationship between peripheral accommodation and visual performance.

    Main Methods:

    • Monocular steady-state accommodation was measured using a laser optometer.
    • Stimuli were presented at retinal eccentricities from 1 to 30 degrees.

    Related Experiment Videos

  • An accommodative stimulus-response function was generated by varying optical distance with lenses.

    • Main Results:

    • Accommodation responses were elicited by targets in peripheral vision.
    • The magnitude of accommodation declined significantly with increasing eccentricity.
    • Response magnitude decreased from 4 D at 1 degree to 1-2 D at 30 degrees.

    Conclusions:

    • Peripheral targets can indeed drive accommodation, albeit with reduced efficacy compared to central vision.
    • The findings suggest that the visual system's accommodative ability diminishes substantially in the periphery.
    • Further research should consider factors like acuity, contrast sensitivity, and convergence accommodation in peripheral vision.