Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1985-07-19
1990-10-09
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351246, G02C 710, A61B 300
Patent
active
049616404
ABSTRACT:
Specially tinted lenses will provide substantial benefits to patients with various forms of visual disturbance caused by a recently identified functional disorder called the Irlen Syndrome of scotopic sensitivity, who show over-stimulation of receptor cells in the wavelength band of 425 to 575 nm. Symptomatically, the Irlen Syndrome is characterized by reduced visual resolution, impaired depth perception, impaired peripheral vision, and ocular vertigo. With use of the lenses the patients report improved visual resolution, increased comfort from reduced symptoms of eye strain, increased depth perception and peripheral vision, and reduced symptoms of ocular vertigo. The treatment includes experientially fitting the patient with lenses of an optimal color and transmission density, namely a predetermined attenuation in the 425-575 nm band. It has been determined according to the invention that pink and peach singly or in combination with blue, green, gray, purple, goldenrod, and yellow tints, can be effectively combined to achieve symptomatic relief. The color and density which is optimal for each patient must be determined individually for each patient and optimized as evaluated by pre-testing and post-testing on the Irlen Differential Perception Scale. Tinting and optical density are further optimized in each patient for near vision, far vision, and night vision.
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Coblentz et al, Spectral-Transmissive Properties & Use of Colored Eye Protective Glasses, National Bureau of Standards, Jun. 1938.
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