Q. Which one is correct about the physiology of eye?
A) The pressure within the eye (the intraocular pressure) is about 1.5 mm Hg (0.2 kPa)
B) When light is shone in one eye both pupils constrict
C) The pupils dilate when the eye is focused on a near object
D) The aqueous humour is an ultrafiltrate of plasma
Explanation
The intraocular pressure is about 10-15 mm Hg ($\sim\alpha\ kPa$). The pupils constrict when the eye focuses on a near object. The aqueous humour is secreted by the ciliary bodies and differs in composition from the plasma.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.