__________ is the dark muscular diaphragm that controls the size of the pupil.

Ciliary muscle

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Aqueous humour

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Iris

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Cornea

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Iris
Iris is a dark muscular diaphragm that controls the size of the pupil. The opening in the pupil determines the amount of light entering our eyes.
During low light conditions, the iris is relaxed making the opening in the pupil wider. This allows more light to enter the eye.
During ample light conditions, the iris contracts making the opening in the pupil narrower. This allows lesser light to enter the eye.

Suggest Corrections

Similar questions

A dark muscular diaphragm that controls the size of the pupil is ______.

If you enter a dark room, what happens to the size of the pupil?

Join BYJU'S Learning Program