Final Info- Ch. 8 Stuff

Question 1

Kollner’s rule states if the problem is at the level of the photoreceptors or earlier, the aquired color vision defect will be:

Answer 1

blue-yellow (tritan) defect

example: cataracts

Question 2

exception to the blue-yellow tritan defect in Kollner’s rule is:

Answer 2

diabetes which can have B/Y problems but is thought to be at middle retina

Question 3

Kollner’s rule states if the problem is at the post-photoreceptor level, the acquired color defect will be:

Answer 3

red-green

example: optic nerve diseases

Question 4

exception to the red-green defect in Kollner’s rule is:

Answer 4

glaucoma is usually B/Y problem, but involves ganglion cell loss

Question 5

SWAP=

Answer 5

short wavelength automated perimetry

Question 6

how does SWAP visual fields work?

Answer 6

uses chromatic adaptation because without adaptation, S-cones are not necessarily more sensitive than M or L cones
example: background yellow but target purple