orthoscope
水檢眼鏡
or·tho·scope /ˈɔrθəˌskop/ 名詞
水檢眼鏡
Or·tho·scope n. Physiol. An instrument designed to show the condition of the superficial portions of the eye.
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orthoscope
n : an ophthalmoscope with a layer of water to neutralize the
refraction of the cornea