This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Objective methods for checking the refractive error are all except \nSelect and explain. \nA. Ophthalmoscopy, B. Retinoscopy, C. Refractometry, D. Keratometry', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ophthalmoscopy The procedure of determining and correcting refractive errors is termed as refraction. The refraction comprises two complementary methods : ? A) Objective methods : Objective methods of refraction include :- (i) Retinoscopy, (ii) Refractometry, (iii) Keratometry. B) Subjective methods : These are :- (i) Subjective verification of refraction, (ii) Subjective refining of refraction, (iii) Subjective binocular balancing.", 'role': 'assistant'}]