Retina 4

Question 0

What is the difference clinically between tyrosinase positive and tyrosinase negative oculocutaneous albinism?

Answer 0

Tyrosinase positive will have increasing pigmentation with age

Question 1

What is the management of IRVAN?

Answer 1

IRVAN stands for Idiopathic retinal vasculitis, aneurysms, and neuroretinitis. It is ddx of exclusion so systemic w/u is required. PO prednisone has shown little help, often PRP is warranted.

Question 2

What is the definition of Zone 2 in regards to ROP?

Answer 2

A circle that extends from zone 1 (posterior 60 degrees) and goes to the nasal ora serrata.

Question 3

What percentage of systemic lupus erythematosus patients will have retinopathy?

Answer 3

3-10%

Question 4

What percentage of males have dichromacy?

Answer 4

2%; dichromacy is only 2/3 functioning color receptors

Question 5

What percentage of males have anomalous trichromatism?

Answer 5

5-6%; anomalous trichromatism is 3/3 functioning color receptors (L, M, S) but one or more does not function normal and causing these individuals to use different proportions of their color receptors.

Question 6

What are the 3 different types of color receptors?

Answer 6

M, L, S

Question 7

Rod monochromatism is inherited in what fasion?

Answer 7

AR

Question 8

What color disorders have an AD inheritance pattern? Most others are X-linked.

Answer 8

Tritanamalous trichromatism and tritanomalous dichromatism

Question 9

Congenital color deficiency are generally progressive or stationary?

Answer 9

stationary, think congenital STATIONARY night blindness

Question 10

What is the typical inheritance of pattern dystrophies?

Answer 10

AD; pattern dystrophies are adult onset (usually midlife) and include adult onset foveomacular vitelliform dystrophy, butterfly dystrophy, reticular dystrophy, and fundus pulverulentus

Question 11

What are relative contraindications for ICG use?

Answer 11

Iodide and shelfish allergy, liver disease and metformin use