What percentage of spectacle wearers receive an astigmatism correction?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Ophthalmic Optics Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What percentage of spectacle wearers receive an astigmatism correction?

Explanation:
Astigmatism correction is often needed in spectacle wear because the eye's surface isn’t perfectly symmetrical, so its refractive power varies by meridian. In typical practice, a large majority of prescriptions include a cylinder component to offset that variation, not just simple spherical power. That’s why about seven in ten spectacle prescriptions require astigmatic correction, making 70% the best answer. The other percentages would represent a smaller portion of prescriptions and don’t reflect how commonly cylinder power appears in actual dispensing.

Astigmatism correction is often needed in spectacle wear because the eye's surface isn’t perfectly symmetrical, so its refractive power varies by meridian. In typical practice, a large majority of prescriptions include a cylinder component to offset that variation, not just simple spherical power. That’s why about seven in ten spectacle prescriptions require astigmatic correction, making 70% the best answer. The other percentages would represent a smaller portion of prescriptions and don’t reflect how commonly cylinder power appears in actual dispensing.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy