Ophthalmic OpticsCâu 25 / 100
The optical center of a lens is the point where what happens?
a.Maximum prism occurs
b.The cylinder axis crosses
c.Light passes with no prismatic deviation
d.The bevel is thickest
Giải thích
At the optical center, light passes straight through with zero prismatic effect. Moving the line of sight away from the optical center introduces prism, per Prentice's rule.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- One prism diopter of power displaces an image by how much and at what distance?
- Which lens curve produces plus power?
- Effective power change from vertex distance is most significant for which prescriptions?
- A photochromic lens changes tint in response to what?
- Anti-reflective (AR) coating improves vision primarily by doing what?
- A polarized lens reduces glare best from which source?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với ABO (American Board of Opticianry) Certified Optician Exam · Quy trình kiểm tra