Question

To focus on a near object:

• A. Ciliary muscles relaxed and refraction of lens decreased
• B. Ciliary muscles contracted and refraction of lens decreased
• C. Ciliary muscles contracted and refraction of lens increased
• D. Ciliary muscles relaxed and refraction of lens increased

Answer 1

Answer:

D. Ciliary muscles relaxed and refraction of lens increased

• When focusing on a near object, the ciliary muscles located around the lens of the eye contract, causing the lens to thicken and increase its curvature.

• This allows the eye to refract light rays from the near object more sharply and bring them into focus on the retina.