Question

class 8 cbse science chapter The human eye important notes​

Answer 1

$\bold{\large{\boxed{\purple{ANSWER}}}}$

☆ The human eye is a spherically shaped sense organ(diameter about 2.3 cm) that gives the sense of sight and helps us perceive colours and depth.☆

$\bold{\large{\red{\tt{Functions \: of \: different \: organs \: in \: the \: human \: eye:-}}}}</p><p></p><p>$

• Light enters the eye through a thin membrane that forms a transparent bulge on the front of the eye, called as the cornea.

• Iris is a dark muscular diaphragm that controls the size of the pupil.

• The pupil is the small opening in the centre of the iris.

• The lens which is behind the pupil helps to adjust the focal length required to clearly focus on objects at various distances.

• The retina is the screen where the images get formed. It is a delicate membrane with a large number of photosensitive cells called rods and cones.

• Cones are sensitive to bright light and rods are sensitive to dim light.

• The optic nerve transmits the electrical signals from the eye to the brain.

I hope it helps u dear friend ^_^♡♡