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Lea Hyvärinen, MD, PhD, has created numerous vision assessment and screening products since designing her LEA SYMBOLS® (apple, house, circle, square) in 1976. Over time, individualized eye chart variations using LEA SYMBOLS were created for various vision screening programs. Dr.... |
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Preschool Assessment of Stereopsis with a Smile (PASS) - Stereoacuity test for school assessment of stereopsis in children and non-readers. Includes: 4 Cards (480, 240, Demo, and Blank) with Carrying Case, 1 Pair Pediatric Polarized Viewers, and 1 Pair Intermediate Polarized Viewers.This... |
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All LED Insta-Line Quantum cabinets use light emitting diodes (LED) to provide uniform illumination for standardized testing. The increased efficiency of the bulbs and the rechargeable battery (included) permit testing in almost any location. Controlled by radio frequency (RF) wireless... |
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All LED Insta-Line Quantum cabinets use light emitting diodes (LED) to provide uniform illumination for standardized testing. The increased efficiency of the bulbs and the rechargeable battery (included) permit testing in almost any location. Controlled by radio frequency (RF) wireless... |
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This card combines a LEA SYMBOLS® line test on one side and a LEA NUMBERS® line test on the opposite side. Proportionally-spaced lines from sizes 20/400 to 20/10 (6/120 to 6/3) equivalent. Attached 16-inch (40cm) cord ensures proper assessment distance. Response key printed on test card.... |
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Adult Near Vision proportionally spaced acuity cards for the the Self Illuminated Viewer. This lit up display are individual cards which are available in the following optotypes; LEA SYMBOLS®, LEA NUMBERS®, Sloan Letters, Tumbling E and Amsler Grid. Line sizes range from 20/250 to 20/10 (... |
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Easily screen both near and distance vision with one chart using the Insta-Line illuminated cabinet.This pediatric eye chart features LEA SYMBOLS® pediatric symbols with two lines of linear-spaced optotypes in the following size equivalents: 20/40, 20/32, 20/25 and 20/20. Distance... |
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The Vision in Preschoolers (VIP) Study, sponsored by the National Eye Institute, initially evaluated 11 vision screening tests in Phase I, including 2 distance visual acuity eye charts – LEA SYMBOLS® and HOTV. LEA SYMBOLS® was the only distance visual acuity test to move on to Phase 2.... |
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The Vision in Preschoolers (VIP) Study, sponsored by the National Eye Institute, initially evaluated 11 vision screening tests in Phase I, including 2 distance visual acuity eye charts – LEA SYMBOLS® and HOTV. LEA SYMBOLS ® was the only distance visual acuity test to move on to Phase 2.... |
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The Runge Near Vision Pocket Card with LEA SYMBOLS® features a format that is both easier and faster to use for near vision screening. Developed by an Optometrist, this Sloan Letter Near Card mimics reading from left to right. LEA SYMBOLS® optotypes on the front of the card contains line... |