This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
Radial Keratoneuritis is seen in 
Select and explain. 
A. Acanthamoeba, B. Herpes-simplex, C. Neuroparalytic, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: (All of the above) (106- Khurana 4th)ACANTHAMOEBA KERATITIS (Protozoal)1. Initial-lesions of acanthamoeba Keratitis are in the form of limbitis, coarse, opaque streakes fine epithelial and subepithelial opacities and radial -kerato- neuritis in the form of infiltrates along coreal nerves2. Advanced cases show a central or paracentral ring shaped lesions, ring abscess, Hypopyon* Acanthamoeba keratitis can also occur as opportunistic infections in patients with herpetic keratitis** bacterial keratitis, bullous keratopathy and neurparalytic keratitis **