This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
What is the indication of using indocyanine green angiography? 
Select and explain. 
A. Occult choroidal neovascularisation, B. Conjunctivitis, C. Vitreous hemorrhage, D. Corneal ulcer
A: Occult choroidal neovascularisation
Answer: A: Occult choroidal neovascularisation 
Explanation: Ans. (a) Occult choroidal neovascularisationRef: Kanski 5/e, Ch 14As opposed to fluorescein, indocyanine green is a larger molecule that binds completely to plasma proteins, causing it to remain in the choroidal vessels.