Prescription AnalysisCâu 38 / 100
Segment height is best defined as what?
a.The vertical distance from the lowest point of the lens to the top of the segment line
b.The horizontal distance between segments
c.The width of the bifocal
d.The pantoscopic tilt
Giải thích
Segment height is measured vertically from the lowest edge of the lens (or the deepest part of the eyewire) up to the top of the segment line, positioning the reading area correctly.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Per ANSI Z80.1 tolerances, verifying a finished single-vision lens checks that the measured power falls within what?
- A lens is decentered 4 mm from the optical center for a +5.00 D lens. How much prism results (Prentice's rule)?
- When reading an Rx, which value is always a plus number on a bifocal?
- Monocular PD is measured from what to what?
- A binocular distance PD of 64 mm typically corresponds to what near PD range?
- Compensated (effective) power differs from the prescribed power mainly due to what?
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