What part protects eyes from any object entering the eye and also shut out light when not required?
Eyelids protect eyes from any object entering the eye and also shut out light when not required.
Choose the correct statements:
Statement 1: We see objects when light emitted from the objects enter our eyes.
Statement 2: We see objects when light reflected from the objects enter our eyes.
Statement 3: Eyes alone cannot see an object.
Statement 4: Eyes emit light rays in all direction.
Statement 1: We see objects when light emitted from luminous objects enters our eyes.
Statement 2: We see objects when light reflected from the non-luminous objects enters our eyes.
Which part of the eye controls the amount of light entering the eye?