Question

what is the time for persistence and define optical and non optical aids in easy language please answer me fast Tommorow is my Exam...... Plz plz plz Answer Fast

Answer 1

Non-optical aids help patients deal with everyday problems where sight is impaired. A review of the many non-optical devices is discussed including relative size devices, writing and communication aids, posturing and positioning aids, illumination control and non-optical sensory substitution devices.

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