| Risley's prism |
(Ris
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| Risley's p. |
a prism that rotates in a metal frame marked with a scale; used in testing ocular muscles for imbalance.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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