COA: Refraction, Retinoscopy, and Refinement Questions + Answers Graded A+

Visual acuity of 6/12 is equivalent to A. 20/20. B. 20/30. C. 20/40. D. 20/50. - Answer-C. 20/40. The fact that most glasses have a downward tilt to minimize oblique astigmatism is called A. interpupillary distance B. pantoscopic tilt C. oblique astigmatism D. image displacement - Answer-B. pantoscopic tilt What is the principle reason for the routine preference of subjective over objective refraction? A. Automated retinoscopy systems make refraction efficient. B. The Jackson cross cylinder is easy to use. C. Sphero-cylinder evaluation is easy. D. The patient's preference is considered in the process. - Answer-D. The patient's preference is considered in the process. What is the result of a loss of accommodation? A. Myopia B. Hyperopia C. Presbyopia D. Amblyopia - Answer-C. Presbyopia What is the ocular structure with the greatest refractive power? A. Cornea B. LensC. Pupil D. Retina - Answer-A. Cornea What test illuminates the screen with a filter that is red on one side and green on the other? A. Worth four-dot B. Ishihara C. Duochrome D. Maddox - Answer-C. Duochrome The distance from the anterior surface of the eye to the back surface of the spectacle lens is the ___________________. A. base curve B. pupillary distance C. lens distance D. vertex distance - Answer-D. vertex distance Retinoscopy is an example of what type of refractometry? A. Objective B. Subjective C. Immediate D. Latent - Answer-A. Objective What is the term for the "bending of light"? A. Dispersion B. Refraction C. Emergence D. Incidence - Answer-B. Refraction