- A 30yo woman had a gradual decrease of visual acuity since the last 3 years. Now she has a
disability due to very low vision. What’s the dx?
a. Glaucoma
b. Cataract
c. Macular degeneration
d. Retinitis pigmentosa
e. Keratitis
Q. 1. What is the key?
Q. 2. Why it is not the other given D/D s?
Ans. 1. The key is D. Retinitis pigmentosa.
Ans. 2. i) It is not angle closure glaucoma as angle closure glaucoma occurs usually after the age of 50; In
open angle glaucoma visual loss is not evenly gradual rather occurs a bit suddenly at its later part. It is
not cataract as cataract occurs usually in elderly. In macular degeneration near blindness does not occur
rather causes inability to identify face or cannot read small prints; otherwise peripheral vision is not that
depressed. In keratitis will be pain, redness, photophobia and vision is ok.