Structure and funtion of the human eye — task. Physics CBSE Live product, Pre-Crash Course.

Choose the correct answer below:

1. The crystalline lens of the human eye plays an important role in vision. Which statement correctly describes its function?

It provides most of the refraction of light entering the eye through its outer surface
It provides fine adjustment of focal length to focus objects at different distances on the retina
It controls the amount of light entering the eye by changing the size of the pupil
It converts the incoming light rays into electrical signals for transmission to the brain

2. A student observes an object and is able to identify its colour and shape. Which sequence correctly explains the process involved in vision?

Light enters through pupil \(\rightarrow\) iris forms the image \(\rightarrow\) retina focuses light \(\rightarrow\) brain sends signals through optic nerve
Light enters through retina \(\rightarrow\) cornea controls light \(\rightarrow\) lens sends signals \(\rightarrow\) brain forms the image
Light enters through the cornea \(\rightarrow\) lens focuses light on retina \(\rightarrow\) retina produces electrical signals \(\rightarrow\) optic nerve carries signals to brain
Light enters through lens \(\rightarrow\) cornea produces signals \(\rightarrow\) pupil sends information to brain \(\rightarrow\) retina interprets the image

Did you find an error?

1. Structure and funtion of the human eye