Defects of Eyes

A person is unable to see distant objects. Which among the following diagram represents the defect of vision he is suffering from.

Kavita from ${10}^{\mathrm{th}}$ is using spectacles. The power of the lenses in her spectacles is $-2.5$ dioptre. Find the focal length (in $\mathrm{cm}$) of the lenses used in her spectacles.

A concave lens is used for correcting defect of eye known as:

Which of the diagrams given below correctly represents the correction of myopia using a lens?

Bi-focal lenses are used in case when a man is suffering from

Doctor has prescribed a lens having power $+1.5 \mathrm{D}$ for correction of eye defect. What will be the focal length of the lens (in $\mathrm{cm}$)?

A person, have hypermetropia

To remove long sightedness, the lens is used

Which of the following helps to correct hypermetropia?
 

Myopia is also known as ______.

Which of these is not a non-optical aid?

Night blindness is caused due to the lack of Vitamin _____.

Which of these is not a good caring of eyes?

Sometimes, the crystalline lens of people at old age becomes milky and cloudy. This condition is called _____.

A person cannot see fundamental colours (red, blue, green). This defect is called :

A long sighted person cannot see clearly :

 Myopic person cannot see clearly :

A concave lens for is used for correcting :

Hypermetropia is rectified by using :