Ophthalmic OpticsCâu 12 / 100
Vertex distance is the measured space between what two points?
a.The two pupils
b.The back of the lens and the front of the cornea
c.The frame front and the temple
d.The optical center and the segment
Giải thích
Vertex distance is the distance from the back surface of the lens to the front of the eye (cornea). It matters most for higher-powered prescriptions where a change alters effective power.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The base curve of a lens refers to which surface?
- Add power on a multifocal lens represents what?
- If the distance Rx is -3.00 D and the add is +2.00 D, what is the total power in the reading portion?
- Chromatic aberration is caused by what?
- Which of the following describes a plano lens?
- Spherical aberration in a lens is best described as what?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với ABO (American Board of Opticianry) Certified Optician Exam · Quy trình kiểm tra