Teaching about Light and Sight: A Handbook for Classroom Teachers in Elementary and Secondary Schools
National Education Association, 1962 - Vision - 55 pages
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12 issues activities AMERICAN OPTOMETRIC ASSOCIATION amount of light angle Angstrom units astigmatism Better Light Better Better Sight Bureau brightness ratios bulb candle ceiling chalkboard classroom teachers color blindness cones contrast cornea correct dark daylight decoration desks direct light direct sunlight drapes electromagnetic spectrum fluorescent lamp fluorescent tubes footcandles footlambert glass home lighting Illuminating Engineering Society incandescent lens level of illumination light and sight Light Better Sight light meter light rays light source light strikes lighting units lumen luminaires material measure ment myopia NATIONAL EDUCATION ASSOCIATION ness object optic nerve paper pencil percent planning possible PREVENTION OF BLINDNESS prism problems pupils reading recommended reflect light reflected glare refraction retina rods roller shades School Lighting sclera seen shadow side Snellen Chart surface Table tion usually Venetian blinds vision visual difficulties visual tasks walls window York