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    Course Description

    Fitting & Evaluation

    have shown that rigid gas permeable (RGP) lenses are indicated for,
    at minimum, 30% of all new contact lens patients. Nevertheless, the
    percentages of new patients being fit into RGPs–especially among younger
    practitioners–are much less. Some practices do not fit RGPs at all despite
    the visual quality, oxygen transmission, durability and wettability

    the ease of fitting soft lenses is a motivating factor. Fitting RGPs
    is an art. Practitioners who fit RGPs take great pride in providing
    the most appropriate contact lens for any given patient ( RGPs, soft
    torics, bifocals) and do not simply fit a patient into their available
    inventory of lenses. RGP fitters are often very successful practitioners
    whose patients perceive their contact lenses to be of value and their
    eyecare professional to be quite competent.

    is well known that adding a small amount of sodium fluorescein to the
    tears causes them to fluoresce a bright yellow-green color when viewed
    under ultraviolet or cobalt light. This makes it possible to view the
    tears that are present between the lens and cornea and to dynamically
    evaluate the fit of a contact lens. The brightness of the fluorescent
    tears increases with the thickness of the tear layer and may be used
    to estimate the amount of clearance between the lens and cornea. Any
    area under the lens where fluorescein is absent appears as black or
    dark, thus indicating a position of lens/cornea bearing or touch. Fluorescein
    is invaluable if not essential in the assessment of rigid lens fitting.
    Without the use of fluorescein the practitioner cannot view the true
    lens-to-cornea fitting relationship.