Light is reflected from ___________ surfaces.
How do you define regular reflection?
What is irregular reflection?
What are the laws of reflection?
How many colours the sunlight can consists of?
Give the main parts of an eye.
Give two great names of visually impaired persons.
What is kaleidoscope?
Give two important factors in which visually impaired persons can depend on for their survival in society.
Describe Braille system.
Lack of vitamin ______ in foodstuff is responsible for many eye troubles.
What are the diet components having vitamin A in them?
How should a person can care of his eyes?
What are luminous objects? Give two examples.
What do you understand by lateral inversion?
Define the concept of dispersion.
In our eye, behind the cornea, we find a dark muscular structure called ________.
What is the blind spot?
The most comfortable distance at which one can read with a normal eye is about __________ cm.
When people are said to have cataract?