Ophthalmology Incidence of primary open-angle glaucoma in population over 40 years of age is about: A 1 in 100 B 1 in 200 C 1 in 500 D 1 in 1000 💡 Explanation Incidence of primary open-angle glaucoma in population over 40 years of age is about: ✓ Correct Answer: A. 1 in 100