Visual Practical

Question 1

How to determine the angle between two cones in the fovea?

Answer 1

You need to know their actual separation S and the focal length of the Eye F.

57.3 x s/f degrees

Question 2

What is the chart with circles called?

Answer 2

Landlord C test chart

Question 3

Loss of red pigment is called?

Answer 3

Protanopia

Question 4

Loss of green pigment is called?

Answer 4

Deuteranopia

Question 5

Loss of blue cone pigment is called?

Answer 5

Tritanopia