Defects of Vision and their Correction

Draw ray diagram of hypermetropic eye.

When do we consider a person to be myopic and hypermetropic? Explain using diagram how the defects associated with myopic and hypermetropic eye can be corrected?

Explain the structure and functioning of human eye. How are we able to see nearby as well as distant objects?

How will you use two identical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light? Draw the diagram.

A person needs a lens of power $-4.5 \mathrm{D}$ correction of her vision. What is the nature of the corrective lens?

A person needs a lens of power $-4.5 \mathrm{D}$ for correction of her vision. What is the focal length of the corrective lens?

A person needs a lens of power $-4.5 \mathrm{D}$ for correction of her vision. What kind of defect in vision is she suffering from?

How are we able to see nearby and also the distant objects clearly?

A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.

Draw ray diagram of myopic eye.

Which of the following statements is correct?

When light rays enter the eye, most of the refraction occurs at the 

A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?

A person cannot see distinctly objects kept beyond $2 \mathrm{m}$. This defect can be corrected by using a lens of power