American Board of Opticianry (ABO) Practice Test

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What is meant by the term "converge" in an opticianry context?

When a patient's eyes move inward to focus at near
Unit of measurement for ophthalmic prism
The side of the lens where the add power if etched
The point where lines that bisect the horizontal and vertical measurements of the lens in the boxing system intersect

The correct answer is: When a patient's eyes move inward to focus at near

The term "converge" in opticianry refers to a patient's eyes moving inward to focus at near objects. This is also known as convergence, and it is an important element of visual acuity and the ability to see objects clearly at close distances. Option B, unit of measurement for ophthalmic prism, is incorrect because the term "converge" does not refer to a unit of measurement. Option C, the side of the lens where the add power is etched, is incorrect because this refers to the "add power" side, not convergence. Option D, the point where lines that bisect the horizontal and vertical measurements of the lens in the boxing system intersect, is incorrect because this refers to the optical center of the lens, not convergence.