Contrast Sensitivity

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	ESV1500 Illuminated Cabinet, Calibrated Using advanced patented technology, this cabinet self-calibrates illumination on the chart surface for both photopic (85 cdm2) and mesopic (3 cdm2) light level testing. LED lights provides uniform and highly calibrated illumination across the entire testing surface (Patent 5,078,486)....
	ESV1200 Illuminated Cabinet LED lights provides uniform illumination across the entire testing surface. Automatically adjusts to incoming power of 100 to 240 VAC. Easily store your charts in handy compartment on back of ESV1200.Compatible with all 9" x 14" Good-Lite charts but are not provided with this unit and...
	LEA NUMBERS® ETDRS-style Low Contrast Charts LEA NUMBERS® ETDRS-style Low Contrast Vision Chart with proportionally spaced (geometric progression) lines translucent low contrast letter chart with line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Available in 2 contrast levels: 2.5% and 10%. Chart size is 24.5" x 25.5...
	LEA NUMBERS® Low Contrast Charts for Illuminated Cabinet A low contrast test is a special way to measure visual acuity; determining how well eyes function in low light situations and/or being able to distinguish objects from similarly colored or shaded backgrounds. Testing is identical to the measurement of visual acuity at high contrast level...
	LEA NUMBERS® Low Contrast Test, 10M Now it's easy to measure, record and detect changes in the transfer of visual information when the change only affects visual acuity at low contrast levels. Chart presents numbers at the following contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%. Pages are offset for easy flipping....
	Lea SYMBOLS® Massachusetts Chart LEA SYMBOLS® pediatric vision chart with 10' and 20' foot notations only. 50% spaced rectangle (Massachusetts Visual Acuity Test format) with line sizes from 20/80 to 20/16 (6/24 to 6/4.8) equivalent. This chart can be used in Good-Lite's illuminated ESV1200, ESV1500, Model A+, Model A...
	LEA SYMBOLS® Translucent Low Contrast Charts for Illuminated Cabinet A low contrast test is a special way to measure visual acuity; determining how well eyes function in low light situations and/or being able to distinguish objects from similarly colored or shaded backgrounds. Testing is identical to the measurement of visual acuity at high contrast level...
	HIDING HEIDI® Low Contrast Face Test Visual communication is the most important communication method during the first year of life. The ability to detect objects of low contrast is an important component of the visual system. For example, facial expressions are mediated by faint shadows and changes in the contours of the...
	LEA SYMBOLS® Low Contrast Test, 10M Test for quick measurement of low contrast visual acuity at 25%, 10%, 5%, 2.5%, and 1.25% contrast by measuring the distance where the symbols are seen. 10M symbols correspond to visual acuity 0.10 at 1 m, 0.05 at 0.5 m and 0.3 at 3 m. VA values are thus easy to calculate. Test includes a...
	LEA™ Core Tests Toolkit for Assessment & Screening 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....