GLARE CONTROL DEVICES/ ILLUMINATION (Click Here for Large Type)

Glare and illumination are two closely related and important factors in using residual vision. In the LOW VISION EVALUATION, we determine the most effective means of reducing glare for the patient AND we determine the proper amount and type of illumination required.

GLARE CONTROL DEVICES

Filters of various colors and transmissions are tested for best response.

Examples:

Gray, green or amber for ultraviolet sun protection.
Corning CPF (orange/yellow) lenses for increased contrast.
Side shields and top shields for ambient/reflected light.
Typoscopes for page reflection glare.

CORNING GLARE CONTROL LENSES

VARIOUS ABSORPTIVE LENSES

ILLUMINATION

Various levels of illumination are tested. When strong illumination is required a gooseneck floor or table lamp is recommended. Illumination mathematics dictates that bringing the light source closer is much more effective than increasing the bulb strength.

A 50 watt bulb at 12 inches from the page is much brighter than a 300 watt bulb 3 feet from the page, and produces less heat.

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