a metro meter
Stedman's Medical Dictionary: A Practical Medical Dictionary · 1920 · p. 2
(a-m6-trom'e-tur) [ametropia + G. metron, measure.] An appliance for measuring the degree of ametropia.
Bu kavram başka kaynaklarda da geçiyor
The Optical Dictionary (1904)
The Student's Medical Dictionary (1896)
An Illustrated Encyclopaedic Medical Dictionary (1891)
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