Question

Example(s) of optical aids for visually challenged people is/are:

• A. Echolocation
• B. Using tongue to see
• C. Magnifying lens
• D. Braille writer

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Echolocation
B Using tongue to see
C Magnifying lens
D Braille writer

There are many additional resources to help the visually challenged persons. These resources can be of two types: non-optical aids and optical aids. Optical aids include bifocal lenses, contact lenses, tinted lenses, other lens combinations, magnifiers and telescopic aids. While the lenses and their combinations are used to rectify visual limitations, telescopic aids are available to view chalkboard and class demonstrations. Also non-optical aids like braille writer, and techniques like echolocation etc are also available.