Question

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$\textbf{\huge{Question:}}$ Briefly explain what is optical aids and Non - optical aids.
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#Question from class 8th chapter Human Eye.

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Answer 1

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 .

Answer 2

Optical aids are those aids using optical instruments for improving the vision. Examples of optical aids are: spectacles, contact lenses, magnifying glasses etc.

Non optical aids use instruments like visual aids, tactual aids, audio aids and electronic aids.