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Simulating decreased visual acuity with a contact lens system

A F Walonker, K R Diddie

    American Journal of Ophthalmology
    |December 1, 1981
    PubMed
    Summary
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    A novel "piggy-back" contact lens system was developed to simulate vision-impairing conditions. This method effectively replicates central scotoma and peripheral field defects for research purposes.

    Area of Science:

    • Ophthalmology
    • Optometry
    • Visual Science

    Background:

    • Decreased visual acuity significantly impacts quality of life.
    • Accurate simulation of visual field defects is crucial for research and device development.

    Purpose of the Study:

    • To introduce a novel "piggy-back" contact lens system.
    • To demonstrate its utility in simulating various conditions causing decreased visual acuity.

    Main Methods:

    • A soft contact lens with a central depression was designed.
    • A hard contact lens was fitted into the depression.
    • This system was used to simulate central scotoma, peripheral field defects, and media opacities.

    Main Results:

    • The "piggy-back" system successfully simulated central scotoma.

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  • Various peripheral field defects were accurately replicated.
  • Simulations of media opacities were also achieved.

    • Conclusions:

    • The described "piggy-back" contact lens system provides a versatile tool for simulating vision-impairing conditions.
    • This method offers a practical approach for studying the effects of visual field defects and opacities.