Question

A. Fill in the blanks
1. The small opening in the ins of the eye is called___________
2. The area of no vision is called__________
3. The image formation takes place on__________
4. The _________ is a system for visually impaired people.
5. A __________ is used in submarines.​

Answer 1

Answer:

1.Pupil

2.Optic nerve

3.Lens

4.Braille

5.Periscope