Light sensitivity meter and uses thereof

Details Light sensitivity meter and uses thereof Light sensitivity meter and uses thereof

2006-11-21

2011-12-27

Greece, James (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S246000

Reexamination Certificate

active

08083350

ABSTRACT:
A text apparatus for measuring the degree of light-sensitivity of a subject, such as a subject with cataracts or migraines. The apparatus comprises a viewing shroud for positioning at least one eye of the subject in a testing position and an illumination source adapted for emitting visible light toward the at least one eye of the subject. The apparatus includes a visual monitor adapted for monitoring the fixation of the at least one eye during testing. A method of the invention exposes at least one eye of a subject to light and either subjects the eye to a continuous, level light intensity or increases the intensity of the light continuously over time. The intensity of the light when the subject experiences discomfort can be recorded. Pulse width modulation can modulate the intensity of the illumination source (e.g., an LED) over time.

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