A spherocylindrical lens has two powers located ____ degrees from each other?

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Prepare for the Certified Paraoptometric Assistant (CPOA) Exam. Study with extensive flashcards and multiple choice questions with explanations. Enhance your skills and knowledge to succeed.

Multiple Choice

A spherocylindrical lens has two powers located ____ degrees from each other?

Explanation:
In a spherocylindrical lens, the two principal powers lie in perpendicular meridians. The sphere power is the same in every direction, while the cylinder adds extra power in the meridian perpendicular to the cylinder axis. This means one principal meridian has sphere plus cylinder power, and the other has just sphere power, with those two powers separated by 90 degrees. That’s why the correct answer is 90 degrees. The other options don’t reflect the perpendicular relationship of the principal powers.

In a spherocylindrical lens, the two principal powers lie in perpendicular meridians. The sphere power is the same in every direction, while the cylinder adds extra power in the meridian perpendicular to the cylinder axis. This means one principal meridian has sphere plus cylinder power, and the other has just sphere power, with those two powers separated by 90 degrees. That’s why the correct answer is 90 degrees. The other options don’t reflect the perpendicular relationship of the principal powers.

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