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Related Experiment Videos

Dotting soft contact lenses

S J Hallock

    Journal of the American Optometric Association
    |March 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Practitioners can ink dot hydrogel contact lenses, but manufacturers cannot. A hard lens technique is effective for soft lenses, with dot durability depending on maintenance.

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    Area of Science:

    • Ophthalmic materials science
    • Contact lens technology

    Background:

    • Regulatory restrictions on marking hydrogel contact lenses exist.
    • Current methods for marking contact lenses may have limitations.

    Purpose of the Study:

    • To evaluate the feasibility of practitioner-applied ink dotting on hydrogel contact lenses.
    • To assess the effectiveness of a specific marking method for soft contact lenses.

    Main Methods:

    • Utilizing Sanford's Sharpie fine point marker (No. 3000-C) for dotting.
    • Employing a hard lens method adapted for use with soft contact lenses.

    Main Results:

    • The Food and Drug Administration (FDA) prohibits manufacturer ink dotting but allows practitioner use.
    • The hard lens technique demonstrated efficacy when applied to soft contact lenses.

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  • The longevity of the ink dots was observed to be variable and dependent on lens care.

    • Conclusions:

    • Practitioner-applied ink dotting is a permissible method for marking hydrogel contact lenses.
    • The described hard lens technique offers a viable approach for marking soft contact lenses.
    • Proper lens care is crucial for maintaining the visibility and durability of ink dots.