Myopia and Its Cure

Q.

Image is formed for the short sighted person at

[AFMC 1988]

1. Retina

2. Before retina

3. Behind the retina

4. Image is not formed at

Q. A man can see the objects up to a distance of one metre from his eyes. For correcting his eyesight so that he can see an object at infinity, he requires a lens whose power is

1. +0.5 D
2. +1.0 D
3. +2.0 D
4. –1.0 D

Q. A myopic person can not see objects lying beyond $2\text{m}$. The focal length and power of the lens required to remove this defect will be

1. $1\text{m}\&0.5\text{D}$
2. $-2\text{m}\&-0.5\text{D}$
3. $0.5\text{m}\&0.5\text{D}$
4. $-0.5\text{m}\&0.5\text{D}$

Q. A man can see clearly up to 3 metres. Prescribe a lens for his spectacles so that he can see clearly up to 12 metres

1. $-\frac{3}{4}D$
2. 3D
3. $-\frac{1}{4}D$
4. -4 D