Contrast in percent is determined by: Contrast = [(B1 - B2)/B1] x 100 where B1 = light reflectance value (LRV) of the lighter area and B2 = light reflectance value (LRV) of the darker...
Search Results "Vision Light"
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A4.29.2 Detectable Warnings on Walking Surfaces
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11B-703.7.2.6.2 Women’s toilet and bathing facilities
The color of the circle symbol shall contrast with the color of the door or surface on which the circle symbol is mounted, either light on a dark background or dark on a light background...
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§ 38.105(b)
an upper case “X”) of 5/8 inch, with “wide” spacing (generally, the space between letters shall be 1/16 the height of upper case letters), and shall contrast with the background either light-on-dark...
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Introduction to the Proceedings
General Services Administration conducted this interdisciplinary Workshop in Washington, D.C. with participants from the fields of medicine (specialists in ophthalmology and low vision),...
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NOTIFICATION
Those who are blind or who have low vision may not be aware of visual cues, such as flashing lights....
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AbleRoad™ App
The AbleRoad website and iOS and Android applications allow people with disabilities and medical conditions - including those who use a wheelchair or have other mobility, vision, hearing...
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Transit Facilities: Rail Stations
It applies to new and altered rapid, light, commuter, and intercity rail stations....
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II. Color Contrast—Step Edges, Lift Platform Edges
Contrast in percent is determined by: Contrast=[B−B)/B]×100 Where B=light reflectance value (LRV) of the lighter area and B=light reflectance value (LRV) of the darker area....
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§ 38.27(c)
an upper case “X”) of 5/8 inch, with “wide” spacing (generally, the space between letters shall be 1/16 the height of upper case letters), and shall contrast with the background either light-on-dark...
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§ 38.55(b)
an upper case “X”) of 5/8 inch, with “wide” spacing (generally, the space between letters shall be 1/16 the height of upper case letters), and shall contrast with the background, either light-on-dark...
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11B-703.8.11 Contrast
Low resolution VMS characters shall be light characters on a dark background....
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C2-2. Undersides of Exterior Stairs
Are the undersides of exterior stairs enclosed or protected with a cane detectable barrier so that people who are blind or have low vision will not hit their heads on the underside?...
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G. What are Detectable Warnings, Why are They Required, and Where Must They be Provided?
Detectable warnings are intended to function much like stop signs for pedestrians who are blind or have low vision....
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Color
Color People with low vision wanted colors to help distinguish between different landscape features....
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402.4 Characters (Section-by-Section Analysis)
This section would also require that characters contrast with their background with either light characters on a dark background or dark characters on a light background....
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4.29.2* Detectable Warnings on Walking Surfaces
diameter of nominal 0.9 in (23 mm), a height of nominal 0.2 in (5 mm) and a center-to-center spacing of nominal 2.35 in (60 mm) and shall contrast visually with adjoining surfaces, either light-on-dark...
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11B-703.7.2.6.1 Men’s toilet and bathing facilities
The color of the triangle symbol shall contrast with the color of the door or surface on which the triangle symbol is mounted, either light on a dark background or dark on a light background...
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How Overgrown Foliage Renders Your Home Security System Completely Useless
Exterior lighting systems suffer the exact same fate when buried behind overgrown wood....
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§100.205(c)(3)(ii)
(ii) Light switches, electrical outlets, thermostats, and other environmental controls in accessible locations;...
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§382.121(a)(2)
(2) Other mobility aids, such as canes (including those used by persons with impaired vision), crutches, and walkers; and...
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12102(4)(E)(iii)(II)
(II) the term ‘low-vision devices’ means devices that magnify, enhance, or otherwise augment a visual image....
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Disorienting Spaces (slide 7)
If you imagine Las Vegas lighting, it’s a lot of really warm lights and it’s a very uniform – (background noise) – of color temperature of light....
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A4.28.4 AUXILIARY ALARMS
To be effective, such devices must be located and oriented so that they will spread signals and reflections throughout a space or raise the overall light level sharply....
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c. Problem: Specifying Colors and Font Sizes
But because of their disability, many people with low vision do not see webpages the same as other people. Some see only small portions of a computer display at one time....
