6 Kurtz Functional Vision Loss

Question 1

What are the two main categories of functional vision loss?

Answer 1

hysteria and malingering

Question 2

Which tests are useful for monocular/binocular V.L. for either moderate or severe? (4)

Answer 2

• comprehensive evluation of tissues
• pupillary light reaction
• potential acuity meter, PAM
• confrontational test

Question 3

Which tests are useful for monocular/binocular V.L. for moderate only. (2)

Answer 3

• Quickly altering test distance to see if acuity remains consistent.
• Prolonged or delayed refraction with encouragement.

Question 4

Which tests are useful for monocular/binocular V.L. for severe only. (2)

Answer 4

• OKN, optokinetic nystagmus

- behaviors that are intact for the totally blind

Question 5

Which tests are useful for monocular V.L. for moderate or severe? (3)

Answer 5

• paired cylinder test
• interruption of vision with a strong plus lens
• prism dissociation

Question 6

Which tests are useful for monocular V.L. for moderate only? (2)

Answer 6

• The American Optical Malingering Test

- The Reading Bar test

Question 7

What are the 5 pathologies most commonly/easily confused with functional vision loss?

Answer 7

• Optical nerve disease
• Stargardt’s
• early keratoconus
• mild amblyopia
• central serous chorioretinopathy

Question 8

Which easily confused pathology can be distinguished from functional vision loss with the help of a perfect pupillary exam?

Answer 8

optic neuropathy or optical nerve disease