Instruments & RegulatoryCâu 87 / 100
A distometer is used to measure what?
a.Vertex distance from the cornea to the back of the lens
b.Pupillary distance
c.Lens power
d.Frame width
Giải thích
A distometer measures the vertex distance between the front of the eye and the back surface of the lens, information needed for accurate power compensation in higher prescriptions.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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