Which term refers to the closest distance that can be resolved in an uncorrected eye?

Prepare for the NBEO Physiological Optics Test with flashcards and multiple choice questions, each offering hints and explanations. Equip yourself for your exam!

Multiple Choice

Which term refers to the closest distance that can be resolved in an uncorrected eye?

Explanation:
The closest distance at which an uncorrected eye can clearly focus is the near point. This marks the limit of accommodation—the eye’s ability to increase optical power to bring a near object into sharp focus. When you try to look at something closer than this point, even with maximum effort of the ciliary muscle, the image cannot be formed on the retina and becomes blurred. The far point is the opposite end of the focusing range—the farthest distance at which a relaxed eye can focus (for a normal eye this is effectively infinity). Distal point and proximal point aren’t used to describe this limit in typical vision terms.

The closest distance at which an uncorrected eye can clearly focus is the near point. This marks the limit of accommodation—the eye’s ability to increase optical power to bring a near object into sharp focus. When you try to look at something closer than this point, even with maximum effort of the ciliary muscle, the image cannot be formed on the retina and becomes blurred. The far point is the opposite end of the focusing range—the farthest distance at which a relaxed eye can focus (for a normal eye this is effectively infinity). Distal point and proximal point aren’t used to describe this limit in typical vision terms.

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