optics 1

Question 1

what is the angle between optical axis and visual axis

Answer 1

5 degrees

Question 2

What is the fovea

Answer 2

a condensation of cone photoreceptors, occurs along optical axis

Question 3

How is the range of light setection divided?

Answer 3

Scotopic - rods
Mesopic - both
Photopic - cones

Question 4

how many cone photopigment genes are ther

Answer 4

s cone - chromosome 7 (S opsin)

L and M cone pigment genes - chromosome 3 (Rhodopsin)

Question 5

What is the refractive index for water gradient in eye

Answer 5

1.33 - cornea

lens - 1.42

Question 6

What is snell’s law?

Answer 6

n1 x sin(angle of incidence) = n2 x sin(angle of refraction)

Question 7

what happens if angle of incidence is
same as critical angle
greater than critical angle

Answer 7

same - 90 degree angle of refraction

greater - total internal reflection

Question 8

frequency = speed (m/s) / wavelegnth

Answer 8

how to calculate frequency

Question 9

What wavelegnths can the eye detect? (visible spectrum)

Answer 9

400 - 700 nanometers (nm)

Question 10

How to charecterize image quality?

Answer 10

point spread function
Wavefront sensing
local contrast

Question 11

How to measure optical quality in clinic?

Answer 11

Measure visual acquity
Contrast sensitivity
Refraction