This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Development and clinical examination, Subject name: Ophthalmology
Acanthamoeba keratitis is associated with 
Select and explain. 
A. Trauma with vegetable matter, B. Wearing of soft contact lenses, C. Dry eyes, D. Entropion
B: Wearing of soft contact lenses
Answer: B: Wearing of soft contact lenses 
Explanation: Acanthamoeba keratitis Mode of infection. Corneal infection with acanthamoeba results from direct corneal contact with any material or water contaminated with the organism. Following situations of contamination have been described: Contact lens wearers using home-made saline Non contact lens related situations include mild trauma with contaminated vegetable matter, salt water diving, wind blown contaminant and hot tub use Oppuunistic infection. Acanthamoeba keratitis can also occur as oppounistic infection in patients with herpetic keratitis, bacterial keratitis, bullous keratopathy and neuroparalytic keratitis. Reference: A.K.Khurana;6th Edition; Page no: 113.