With reference to the functioning of the eye, answer the questions tha

1.	With reference to the functioning of the eye, answer the questions that follow : (i) What is meant by power of accommodation of the eye ? (ii) What is the shape of the lens during (1) near vision. (2) distant vision ? (iii) Name the two structures in the eye responsible for bringing about the change in the shape of the lens. (iv) Name the cells of the retina and their respective pigments which get activated (1) in the dark (2) in light.
Answer» (i) The alteraction in thickness of lens that enables us to see objects at varying distances is called accomodation. 1. During near vision the shape of the lens is more convex or rounded. 2. During distant vision the shape of the lens is less convex or flat. (iii) Ciliary muscles and suspensory ligament. (iv) 1. In the dark — The cells are rods in pigment is rhodopsin. 2. In the light — The cells are cones the pigment is lodopsin.

With reference to the functioning of the eye, answer the questions that follow : (i) What is meant by power of accommodation of the eye ? (ii) What is the shape of the lens during (1) near vision. (2) distant vision ? (iii) Name the two structures in the eye responsible for bringing about the change in the shape of the lens. (iv) Name the cells of the retina and their respective pigments which get activated (1) in the dark (2) in light.

Answer»

(i) The alteraction in thickness of lens that enables us to see objects at varying distances is called accomodation.

1. During near vision the shape of the lens is more convex or rounded.

2. During distant vision the shape of the lens is less convex or flat.

(iii) Ciliary muscles and suspensory ligament.

(iv) 1. In the dark — The cells are rods in pigment is rhodopsin.

2. In the light — The cells are cones the pigment is lodopsin.