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--------------------- Briefly explain what is optical aids and Non - optical aids.---------------------#Question from class 8th chapter Human Eye.#Thank you all in Advance...#Be Happy...

Answer»

Non optical aids:-
these OFTEN include (1) tactual aids ( using sense of touch ) . the visually impaired can learn to read and write by using a special touch system CALLED the Braille . this system make USE of raised dots on a paper . (2) auditory aids ( using sense of hearing ) include audio cassettes, tape recorders, audio CDs, audio books and electronic devices like computer / calculators / closed circuit television. these , with the help of a software programme , can transfer text files into sound.

optical aids :-
these include lenses and telescopic aids. while suitable LENS combinations are USED to rectify visual limitations, the telescopic aids can help to view class demonstrations and the blackboard .



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