MEM retinoscopy indicates a relative lead when which response is observed?

MEM retinoscopy indicates a relative lead when which response is observed?

• A. No response
• B. Neutral
• C. With motion
• D. Against motion

Answer: (D)

MEM retinoscopy checks how the eye’s accommodation responds at a near target. The direction of the reflex shows whether the eye is over- or under-responding to the near demand. A relative lead means the eye is accommodating more than the near target requires. At near, that over-response shows up as a reflex moving opposite to the sweep of the retinoscope—against motion. So when you observe against motion in MEM, it indicates a relative lead (the accommodative response is ahead of the demand). In contrast, with motion would suggest under-accommodation, and neutral or no motion would indicate the response matches the near demand.

MEM retinoscopy checks how the eye’s accommodation responds at a near target. The direction of the reflex shows whether the eye is over- or under-responding to the near demand. A relative lead means the eye is accommodating more than the near target requires. At near, that over-response shows up as a reflex moving opposite to the sweep of the retinoscope—against motion. So when you observe against motion in MEM, it indicates a relative lead (the accommodative response is ahead of the demand). In contrast, with motion would suggest under-accommodation, and neutral or no motion would indicate the response matches the near demand.