American Board of Opticianry (ABO) Practice Test 2025 - Free ABO Practice Questions and Study Guide

Question: 1 / 400

What is the average adult pupil distance?

50 to 54 mm

62 to 64 mm

The average adult pupil distance, commonly referred to as pupillary distance (PD), typically falls within the range of 62 to 64 mm. This measurement is crucial for optical fittings, as it ensures that lenses are properly aligned with the centers of the pupils. Proper alignment is essential for achieving optimal visual comfort and clarity, particularly in prescriptions for glasses.

While individual measurements can vary based on several factors such as age, ethnicity, and individual anatomy, the average range of 62 to 64 mm is widely accepted in the field of optometry. Accurate knowledge of this range assists opticians in providing well-fitted eyewear that accommodates the majority of adult patients, enhancing visual performance and minimizing eyestrain.

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70 to 72 mm

55 to 59 mm

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