Prescription AnalysisCâu 44 / 100
Hand neutralization of an unknown lens uses what technique?
a.Measuring edge thickness
b.Weighing the lens
c.Moving the lens and observing target movement to add opposite power
d.Reading the frame stamp
Giải thích
In hand neutralization, an optician moves the lens across a target line; the direction of apparent movement indicates plus or minus, and trial lenses of opposite power are added until movement stops.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Compensated (effective) power differs from the prescribed power mainly due to what?
- A -8.00 D lens is moved closer to the eye. Its effective minus power does what?
- Neutralizing a lens with a lensmeter finds what point?
- With-the-rule astigmatism typically has the cylinder axis oriented near what?
- An Rx reads OD +1.50 -0.50 x 090, OS +1.50 -0.50 x 090, Add +2.25. What is the near power in each eye?
- Prism prescribed as '2 base out' in each eye is used to help with 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