Dark Adaptation Flashcards
1
Q
Monochromat DA cure =
A
Rod only response
2
Q
X-linked congenital stationary night blindness =
A
Cone only response
3
Q
Vitamin A defiency =
A
Elevated DA threshold
4
Q
Congenital Stargardt Macular Dystrophy =
A
- Latter portion of DA is prolonged
2. Takes ~90 mins to fully DA & reach threshold
5
Q
Choroideremia =
A
Elevated DA threshold
Looks like cone-only curve
6
Q
Ogouchi Disease =
A
- Takes the longest to DA ~ 4 hrs
- Initially, no rod portion
7
Q
Fundus Albipunctatus =
A
- Rate is lengthened
2. Normal final rod and cone thresholds
8
Q
Retinitis Pigmentosa =
A
Early Dx = elevated threshold
Progressive = Cone only response (rods involved first in this disease)
9
Q
ARMD =
A
Increased time for DA
10
Q
High Myopia =
A
Elevated Rod threshold
11
Q
In TBI patients, what is elevated?
A
Elevated Scotopic Threshold
12
Q
What does cannabis do for night vision?
A
Improves night vision
