American Board of Opticianry (ABO) Practice Test

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Prepare for the ABO (American Board of Opticianry) Test with interactive flashcards and hundreds of multiple choice questions. Updated for 2024 to help you excel on exam day

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What compensatory action is taken if a minus lens is moved further away from the eye?

Defined as grams per cubic centimeter
Applied to the back of the lens with the ridged side out
Most children are born hyperopic
Increase the lens power or move the lens closer to the eye.

The correct answer is: Increase the lens power or move the lens closer to the eye.

When a minus lens is moved further away from the eye, the effective power of the lens decreases. This is because the distance from the lens to the eye alters how the light rays are refracted. To achieve the same visual correction, it is necessary to either increase the power of the lens or bring the lens closer to the eye to compensate for this change in position. Increasing the lens power allows the lens to maintain focus on the intended visual target, counteracting the loss of effective power caused by the increased distance from the eye. Therefore, moving the lens closer or increasing its power is essential to ensure the visual correction remains effective.