JAMB - Physics (2025 - No. 88)
The focal length of the natural eye lens is variable due to the action of the
Optical fluid
Ciliary muscle
Vitreous humor
retina nerves
คำอธิบาย
B. Ciliary muscle.
The ciliary muscles control the shape of the lens, allowing the eye to focus on objects at different distances by changing the focal length of the lens.