lecture 18.5 OKN/OKR

Question 1

OKN and OKR stand for….

Answer 1

optokinetic nystagmus and optokinetic response

Question 2

Do rods detect optokinetic lines better when they are more spaced out or when they are closer together?

Answer 2

rods detect lines that are farther apart better than lines that are closer together and cones detect lines that are closer together better. this is due the fact that rods have a lower spatial frequency and cones have a higher spatial frequency.

Question 3

What are the 2 methods to OKR?

Answer 3

induction and suppression

Question 4

in regards to OKR, which method correlated better to distance subjective V.A.?

A) induction
B) suppression

Answer 4

B) suppression

Question 5

between cones and rods, which have a higher contrast sensitivity?

Answer 5

cones

Question 6

A lost of contrast sensitivity is one of the 1st signs of which ocular disease?

Answer 6

glaucoma, loss of contrast is often noticed before abnormal ocular pressures

Question 7

(T or F) OKN testing is another way to measure visual acuity.

Answer 7

true