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The World Health Organization ( WHO ) uses the following classification of visual impairments. When the vision in the better eye with the best possible glasses or contacts lens correction is: 20/30 to 20/60 considered mild vision loss or near normal 20/70 to 20/160 considered moderate 20/200 to 20/400 considered severe 20/500 to 20/1000 considered profound < 20/1000 considered near total blindness NO light perception considered totally blind ALSO: any person not correctable to better than 20/200 in best eye or with < 20 degrees of visual field is considered LEGALLY BLIND.
Not a regular eye exam with reading the distance eye chart.
It is a FUNCTIONAL assessment of how an individual works with the vision they have (sight at different distances is measured i.e. faces, stove dials, small print, street signs...)
Evaluate blurry/blindspots in the visual field, contrast sensitivity, extent of color vision, glare tolerance, double vision, visual/cognitive processing, eye tracking…
It is tailored to each individual’s need
The Low Vision Exam A. Distance VA B. Near VA C. Visual Fields D. Depth Perception E. Color Vision Testing D. Contrast Sensitivity E. Lighting F. Glare Sensitivity G. Trial frame refraction H. Response to magnification / Determination of Aids I Visual / Perceptual Testing ( if applicable ) J. Ocular health exam
LOW VISION AIDS A. Spectacle Correction B. Contact Lenses C. Prisms D. Filters E. Telescopes - Monoculars - Binoculars - Sportoculars - Bioptic TS - Galilean VS Keplarian - Ocutech autofocus