<prompt> Objective methods for checking the refractive error are all exceptOphthalmoscopyRetinoscopyRefractometryKeratometry  <response>: 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. 