Question

explain why we cannot see our surroundings clearly when we enter a darkened cinema hall from bright sunshine but our vision improve after some time

Answer 1

When we enter the dark room, due to small size of pupil, very little light enters our eyes. But after some time, the pupil expands and we become able to see things as more light enter our eyes now.

In the same way, while coming out from a dark room to bright light, our eyes feel a glaring affect. This is due to the reason that in dark room the pupil is large so when we come out in bright light, a large amount of light enters our eyes and we feel glare. But after sometime, the pupil contracts and we become able to see clearly as less light enters our eyes now.