Question

what is non optical and optical aids

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.

Any optical system which is used in conjunction with the eye. Optical appliances include spectacles, contact lenses to correct sight and/or anomalies of binocular vision and also telescopes or microscopes to magnify an object. Syn. optical aid.

Answer 2

$\textbf{\underline{\underline{Non-Optical\:Aids}}}$

$\implies$ These often Include 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 makes use of raised dots and Auditory aids include audio cassettes,tape recorders, audio books.

$\textbf{\underline{\underline{Optical\:Aids}}}$

$\implies$ These includes lenses and telescopic aids. While suitable lens combinations are used to rectify visual limitations,the telescopic aids can help to view class demonstrations and black board.