† ophthalmotropometern. [ < German Ophthalmotropometer (1873 or earlier) < ophthalmo- + tropo- (in Tropologietropologyn.) + -meter-metercomb. form2] Obsoleterare an instrument for measuring the lateral movements of the eye.
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1876 Catal. Special Loan Coll. Sci. Apparatus S. Kensington Mus. 552Ophthalmotropometer. An apparatus for determining the movements to right and left of each eye.