Prescription AnalysisCâu 34 / 100
A patient has Rx OD -1.00 DS. What does 'DS' indicate?
a.Double segment
b.Distance seg
c.Decentration standard
d.Diopters sphere with no cylinder
Giải thích
DS stands for diopters sphere, meaning the lens is spherical only with no cylinder or axis. The prescription is simply -1.00 D of sphere.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Transpose the Rx: +2.00 -1.00 x 090 into plus-cylinder form.
- Transpose the Rx: -3.00 +2.00 x 045 into minus-cylinder form.
- In the Rx -2.50 -0.75 x 180, what does the 180 represent?
- 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?
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