Question

To increase the focal length of an eye lens,

• A. ciliary muscles need to be relaxed.
• B. ciliary muscles need to be contracted.
• C. cornea need to be adjusted.
• D. retina is moved back and forth

Answer 1

The correct option is A ciliary muscles need to be relaxed.

To increase the focal length of the eye lens, eye muscles i.e. ciliary muscles need to be relaxed. This results in thinner eye lens. The sharp image of the distant object is formed at the retina.