A MEM result of +0.80 D would most likely indicate a lag of accommodation.

A MEM result of +0.80 D would most likely indicate a lag of accommodation.

• A. Lag
• B. Lead
• C. No difference
• D. Unrelated

Answer: (A)

Monocular Estimation Method measures how closely the eye’s actual accommodation matches the focusing demand at near. A positive MEM value means the eye is under-accommodating relative to the target, i.e., a lag. Here, +0.80 D indicates the accommodative response is about 0.80 diopters less than what the near target requires. At a near distance like 40 cm, the demand is about 2.50 D, so the actual response would be roughly 1.70 D. That shortfall shows up as a lag of accommodation. A lead would show up as a negative value, meaning the eye is over-accommodating relative to the demand, and zero would mean perfect matching. So +0.80 D best reflects a lag of accommodation.

Monocular Estimation Method measures how closely the eye’s actual accommodation matches the focusing demand at near. A positive MEM value means the eye is under-accommodating relative to the target, i.e., a lag.

Here, +0.80 D indicates the accommodative response is about 0.80 diopters less than what the near target requires. At a near distance like 40 cm, the demand is about 2.50 D, so the actual response would be roughly 1.70 D. That shortfall shows up as a lag of accommodation.

A lead would show up as a negative value, meaning the eye is over-accommodating relative to the demand, and zero would mean perfect matching. So +0.80 D best reflects a lag of accommodation.