PhotoReceptors

Question 0

What is the cornea and where is it located?

Answer 0

The cornea is the transparent part of the sclera , it bends light rays into the eye.

Question 1

Where is the sclera located and what does it do?

Answer 1

It is the white , tough external layer of the eye. It protects the eyegula .

Question 2

What is the choroid ?

Answer 2

The choroid is the intermediate layer of the eyegula . The sides and back absorb scattered light and contains blood vessels that nourish the eyegula. The middle layer of the eyegula (choroid ) includes the iris, pupil and clitary muscles .

Question 3

What is the function of the iris?

Answer 3

Regulates the amount of light that enters the eye.

Question 4

What is the function of the pupil?

Answer 4

Is the opening for light to enter the inner eye .

Question 5

What do the clitary muscles do ?

Answer 5

Change the shape of the lense in order to focus .

Question 6

What is the retina?

Answer 6

Internal layer of the eyegula. It contains the rods and cones

Question 7

What is the difference between the rods and cones of the eyegula?

Answer 7

The rods are photoreceptors that are sensitive to light intensity .
The cones are sensitive to different wave lengths of light.

Question 8

What is fovea centralis?

Answer 8

It is what contains a lot of cones and provides acute vision