The far point of a myopic eye is at 50 cm. Calculate the power of the lens to correct his vision.
The far point of a myopic eye is 80 cm in front of the eye. What is the power of the lens required to enable him to see very distant objects clearly?
The near point of a hypermetropic eye is at 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book held at 25 cm from the eye ?
A person cannot see the objects distinctly, when placed at a distance less than 100 cm. What is the power of the spectacles that he should use to see clearly the objects placed at 25 cm?
The near point of a hypermetropic eye is 50 cm. Calculate the power of the lend to enable him to read a book at 40 cm ?
A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of corrective lens to restore proper vision ?
What is the far point and near point of the human eye with normal vision ?
A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?