This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Investigation in ophthalmology and miscellaneous topics, Subject name: Ophthalmology
Which of the following can not be diagnosed on direct ophthalmoscopy 
Select and explain. 
A. Diabetic retinopathy, B. Retinitis pigmentosa, C. Angle recession, D. papilledema
C: Angle recession
Answer: C: Angle recession 
Explanation: Angle recession cannot be diagnosed by direct ophthalmoscopy Diseases that can be diagnosed by Direct Ophthalmoscope Location of cataract (distant direct ophthalmoscopy) Diabetic retinopathy Hypeensive retinopathy Age-related macular degeneration Fundus dystrophies Optic neuritis Papilledema Glaucoma Comprehensive Ophthalmology, 6th edition, A K Khurana, Pg 590