Which of the following does NOT test the accuracy of the accommodative system?

• A. Nott's retinoscopy
• B. MEM
• C. NRA/PRA
• D. MAF

Answer: (D)

Testing how well the eye’s accommodation matches the demand is about accommodative accuracy, while testing how quickly the eye can adjust focus under changing demands is about accommodative facility.

Nott’s retinoscopy directly measures how far the actual accommodative response is from the requested demand by observing the reflex at different working distances; it reveals lag or lead in accommodation, giving a direct read on accuracy.

MEM uses a near target and neutralization techniques to estimate how accurately the eye is responding to near demands; the results reflect accommodative accuracy at near.

NRA/PRA assess how much you can relax or stimulate the accommodative system at a fixed distance by adding plus or minus lenses, showing the range and precision of the accommodative response as demands change.

Monocular accommodative facility, by contrast, tests how quickly and reliably the eye can shift focus when the optical demand is alternated with flippers. It emphasizes speed and consistency of response (facility) rather than how precisely the response matches a specific demand. Therefore it does not directly test the accuracy of the accommodative system.