This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Uveal tract, Subject name: Ophthalmology
Amsler sign is seen in 
Select and explain. 
A. Pars planitis, B. Fuchs uveitis, C. Macular degeneration, D. Posner-Schlossman syndrome
B: Fuchs uveitis
Answer: B: Fuchs uveitis 
Explanation: HETEROCHROMIC IRIDOCYCLITIS OF FUCHS It is a low grade chronic cyclitis, the only apparent features of which are a lightening of the colour of the affected iris and presence of few keratic precipitates on cornea. Iris become atrophic, loses its markings and readily transilluminates in circumscribed areas, and a cataract develops. Loss of sympathetic nerve supply leading to dilatation of blood vessels, white cells escape and get deposited on the cornea as precipitates. The cataract has good operative prognosis, but secondary glaucoma develops. During cataract surgery, fine filiform hemorrhage from the opposite angle has been noted to occur as soon as the anterior chamber is opened- reffered to as AMSLER SIGN. Ref:- Parsons diseases of eye; pg num:-251