What is presbyopia? State its cause. How is it corrected

• Human Eye & Colourful World (C10)

What is presbyopia? State its cause. How is it corrected?

Answer

Presbyopia: Defect of vision when a person is unable to see nearby as well as far off objects clearly.

Causes: Gradual weakening of the ciliary muscles / diminishing flexibility of the eye lens.

Correction: By the use of bi-focal lenses.