Optical MathCâu 94 / 100
A frame has an A measurement of 52 mm, DBL of 18 mm, and the patient's PD is 62 mm. What is the total decentration for both lenses combined?
a.8 mm per lens
b.0 mm
c.16 mm per lens
d.8 mm total (4 mm per lens)
Giải thích
Frame PD (geometric center distance) = A + DBL = 52 + 18 = 70 mm. Total decentration = frame PD - patient PD = 70 - 62 = 8 mm total, split as 4 mm per lens.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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