Lect 14 functional vision loss Kurtz

Question 1

Describe functional vision loss

Answer 1

When the pt sees nothing and the doctor sees nothing

Question 2

What do you call vision loss that is not due to tissue damage?

Answer 2

non-organic visual disorder

Question 3

What are the 2 main categories of functional vision loss?

Answer 3

1) Malingering

2) Hysteria

Question 4

(T/F) Hysteria is more common in males

Answer 4

false, more common in females

Question 5

Which type of functional vision loss is associated with a death in the family, unemployment, divorce, or other major stressor?

Answer 5

hysteria

Question 6

Which type of functional vision loss is associated with someone who is lying?

Answer 6

malingering

Question 7

Name 5 good tests to perform for monocular functional vision loss

Answer 7

paired cylinder test, interruption of vision with a strong plus lens, prism dissociation, american optical malingering test, the reading bar test

Question 8

What are the 3 tests to perform for suspected hysteria?

Answer 8

potential acuity meter (PAM), prolonged/delayed refraction, tangent screen

Question 9

(T/F) If a pt is malingering, a corkscrew pattern tangent screen is unlikely

Answer 9

false, it is likely

Question 10

(T/F) In regards to tangent screen, the pts visual field should double in size if they move back twice as far?

Answer 10

true

Question 11

Which one of the following is NOT a disease that may masquerade as FVL?

a) optic nerve disease (distinguish FVL from ON disease using pupils)
b) early keratoconus
c) morning glory syndrome
d) mild amblyopia
e) early stargardts disease
f) central serous chotioretinopathy

Answer 11

c) morning glory syndrome

Question 12

What is useful only for severe degree of vision loss?

Answer 12

OKN