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UltraLens
Black lights, which generate both UV and blue light, are sometimes used in vision development activities. UltraLens glasses screen out 100% of UV and blue light while still allowing the wearer to see the glow of materials as they fluoresce. A soft case is included with each UltraLens.
Note: Filters ike the UltraLens should always be worn by both the practitioner and the child during exposure.
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American Printing House for the Blind, Inc.