Question

If the light source in front of an eye becomes suddenly bright

• A. focus of lens will change
• B. retinal blood supply will be cut off
• C. vitreous humour will become fluid
• D. pupil will contract

Answer 1

The correct option is D

pupil will contract

The correct option is D

Explanation for the correct option:

1. Pupil is the part of the eye.
2. It is present at the center in the form of a round window in the eye.
3. Pupil is sensitive to light and control the amount of light entering the eye.
4. Pupil gets dilated at dim light and constricted in bright light.

Explanation for the incorrect options:

Option A:

1. The focus of length changes if there is any defect of vision but here the size of the pupil gets affected by the light.

Option B:

1. Retinal blood supply will be cut off in case on any blood clots in the retinal blood vessels.

Option C:

1. Vitreous humour will not become fluid as sudden bright light cause only effect to the size of the pupil.

Final answer: If the light source in front of an eye becomes suddenly bright, pupil will contract.