Question

A temporary blurring/dazzling occurs when one comes out of a cinema hall due to

• A. Sudden activation of cone cells
• B. Bleaching of rods
• C. Overlapping of images by both rods and cones
• D. Closure of pupil

Answer 1

The correct option is A Sudden activation of cone cells

There are two types of photoreceptor cells in retina, cones and rods. Cones are associated with daylight vision and colour vison and rods are associated with vision under low light or dim light.

Cinema halls have dim light. Under these conditions, rods of eyes get activated. When a person comes out of cinema hall, light intensity will change and get brighter. The eyes will adapt according to light intensities to focus on the objects. So there will be sudden activation of cone cells due to which a temporary blurring or dazzling may occur as eyes take sometime to focus.

So, the correct answer is 'Sudden activation of cone cells'.