This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and refraction, Subject name: Ophthalmology
[{'content': 'Treatment modalities for myopia are \nSelect and explain. \nA. Radial keratotomy, B. LASER Keratomileusis, C. Epikeratophakia, D. LASER Keratoplasty', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Treatment of myopia 1. Optical treatment of myopia 2. Surgical treatment of myopia Radial keratotomy (RK) Photorefractive keratectomy (PRK) Laser in-situ keratomileusis (LASIK) Extraction of clear crystalline lens Phakic intraocular lens Intercorneal ring (ICR) implantation Ohokeratology 3. General measures-include balanced diet rich in vitamins and proteins and early management of associated debilitating disease. 4. Low vision aids (LVA) 5. Prophylaxis (genetic counselling). Reference : A K KHURANA OPHTALMOLOGY,Edition4, page-35,36,47,48', 'role': 'assistant'}]