Plastic 6-1/2 X 3-1/2 * Use at 14 distance * Durable laminated plastic * Precise clear legible; provides 20/800 distance equivalent testing at 14 .* The back of the card features a millimeter scale and an inch scale * Visual acuity (Va) can be assessed by using the Pocket Vision Screener (not to be confused with the larger Snellen eye chart) * The Pocket Vision Screener gives a distance equivalent Va even though the card is held 14 from the patient * Va testing is done in the following manner: Have the patient wear their corrective lenses (if any) make sure the card is evenly illuminated and instruct the patient to hold the test card 14 away from their eyes * Corrective lenses are worn in order to determine the best-corrected VA * Ask the patient to cover their left eye (the right eye is always examined first) * Ask the patient to say each letter or read each word on the line of smallest characters that are legible on the card * Record the Va for the right eye according to the accepted notation method.* Repeat the process for the left eye and then with both eyes viewing the test card and record the VA * Patient's who cannot see the letters or numbers on the card should have their vision recorded as count fingers (e.g. CF at 5ft) hand motion (e.g. HM at 2 ft) light perception (LP) or no light perception (NLP). *
