The Human Eye and the Colourful World_LS_2

Near and far points of a young person normal eye respectively are

• 0 and infinity

• 0 and 25 cm

• 25 cm and infinity

• 25 cm and 150 cm

WHAT IS THE NEAR POINT OF THE EYE ?

• 15 CM

• 20 CM

• 25 CM

• 30 CM

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the second statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the third statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the fourth statement of the audio clip?

• The normal eye is not able to see clearly objects placed closer than 25 cm

• because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

• The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

• After this the ciliary muscles cannot make the eye-lens more thick.

What changes take place in the shape of eye-lens :

(a) when the eye is focused on a near object?

• Eye-lens becomes thicker.

• Eye-lens become thinner.

What changes take place in the shape of eye-lens :

(b) when the eye is focused on a distant object ?

• Eye-lens becomes thicker.

• Eye-lens become thinner.