Advanced Binocular Vision (ABV) Exam 2 Practice

To facilitate accommodative therapy, which working-distance adjustment is recommended when using plus lenses?

Increase the working distance when working with plus lenses Decrease the working distance when using minus lenses Decrease the working distance when working with plus lenses Increase the working distance when using plus lenses

Correct Answer:

Decrease the working distance when working with plus lenses

Explanation:

When using plus lenses, they reduce the amount of accommodation the eyes need for a near target by providing part of the focusing power. To keep accommodative therapy effective, you want to challenge the system without overloading it. Moving the target closer increases the demand on accommodation and vergence, but the plus lenses cushion that demand, allowing a controlled, tolerable challenge. This pairing helps improve accommodation and convergence responses over time while keeping the exercise comfortable. Increasing the working distance would lessen the demand too much and make therapy less effective, and using minus lenses would raise demand in a way that plus lenses aren’t meant to balance.

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