Visual Fields

Question 1

What 2 types of factors determine VFs?

Answer 1

Monocular: photoreceptors extent/angle of i/r at cornea

Binocular: eye placement in skull

Question 2

Which factors affect sensitivity profile? Draw it

Answer 2

Photoreceptor distribution
RGCs distribution
Lighting conditions

Question 3

Describe +/- scotomas and the difference between absolute/relative

Answer 3

+blackout, -px brain fills in gap

Absolute: complete retinal sensitivity loss
Relative: reduced retinal sensitivity

Question 4

Describe the blood supply distribution to the retina?

Answer 4

Inner 2/3 ~ central (then branch) retinal arteries
Outer 1/3 ~ choroid (short/long post. arteries)