ABO NOCE Practice Test

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What is the tolerance for cylinder power when it is between 0-2.50?

0.20D
0.13D
0.15D
0.10D

The correct answer is: 0.13D

The tolerance for cylinder power when it falls between 0 and 2.50 diopters is indeed 0.13D. This standard is rooted in the norms established in the field of optics and optical prescriptions, where specific tolerance levels are based on the power of the lens. Tolerance levels are crucial in ensuring that the corrective lenses provided to a patient are as accurate as possible, promoting better visual acuity and comfort. In the case of cylinder powers up to 2.50D, the specified tolerance is precisely 0.13D, meaning that the actual cylinder power on the prescription could deviate by this amount without compromising the functionality of the lens significantly. This tolerance allows for some variability in manufacturing while still delivering lenses that meet the necessary correction needs. Understanding these figures is essential for anyone studying optics, as it helps in the accurate fitting of prescriptions to patients for optimal vision correction.