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In page Sabriye Tenberken:

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As no blind student had ever before ventured to enroll in these kinds of studies, Sabriye could not fall back on the experience of previous students, so she developed her own methods of studying her course of study. By 1992 Sabriye had developed Tibetan Braille, which later became the official reading and writing system for the blind in Tibet. Tibetan Braille is based on German Braille, modified to accommodate the Tibetan script. For example, Tibetan ka, kha, ga, nga are written with the standard Braille letters for k, c, g and lowered g. It was submitted for examination to a Tibetan scholar, who found it to be readily understandable, simple, and easy to learn.[citation needed]