Which of the following is NOT a MEM finding option?

• A. Plano
• B. +0.25 to +0.50
• C. +0.75 to +1.00
• D. +1.00D

Answer: (A)

Monocular Estimation Method measures how closely a person’s near accommodation matches the visual demand by finding the lens power that neutralizes the near reflex. The lens power needed is the MEM finding and it is expressed in diopters as a positive value when the patient shows an accommodative lag (under-accommodation relative to the demand). Typical MEM findings are small positive diopters like +0.25 to +0.50, +0.75 to +1.00, or about +1.00 D. A plano result would indicate no lag, but in this MEM scoring format that zero-lens condition isn’t listed as a MEM finding option. So the plano value isn’t considered an MEM finding.