What are the expected findings for MEM?

What are the expected findings for MEM?

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

Answer: (B)

MEM, or Monocular Estimation Method, uses a near target and retinoscopy to gauge how well the eye’s accommodation keeps up with near demand. You look at the reflex at a typical near distance (about 40 cm) and determine what plus lens power is needed to neutralize that reflex. If you need a small plus lens to neutralize, that means the eye is not fully accommodating for the near task—a normal small lag. A small positive MEM value around +0.25 to +0.50 diopters is considered normal. It reflects a tiny lag in accommodation that most people have at near, which is typical and generally not clinically concerning. Values larger than this, especially approaching or exceeding +1.00 D, suggest a more pronounced accommodative lag or potential accommodative insufficiency. Conversely, needing little to no plus (near plano) would imply less lag than average, which is uncommon at typical near work.

MEM, or Monocular Estimation Method, uses a near target and retinoscopy to gauge how well the eye’s accommodation keeps up with near demand. You look at the reflex at a typical near distance (about 40 cm) and determine what plus lens power is needed to neutralize that reflex. If you need a small plus lens to neutralize, that means the eye is not fully accommodating for the near task—a normal small lag.

A small positive MEM value around +0.25 to +0.50 diopters is considered normal. It reflects a tiny lag in accommodation that most people have at near, which is typical and generally not clinically concerning. Values larger than this, especially approaching or exceeding +1.00 D, suggest a more pronounced accommodative lag or potential accommodative insufficiency. Conversely, needing little to no plus (near plano) would imply less lag than average, which is uncommon at typical near work.