Ophthalmology What is regular astigmatism? A Astigmatism in which the principal meridians are parallel B Astigmatism in which the principal meridians are perpendicular C Asymptomatic astigmatism D Astigmatism as a result of cataract surgery 💡 Explanation What is regular astigmatism? ✓ Correct Answer: B. Astigmatism in which the principal meridians are perpendicular