prisoptometern.
/ˌprɪzɒpˈtɒmᵻtə/, U.S. /ˌprɪzɑpˈtɑmədər/ Ophthalmology. Now rare or disused.
An optometer incorporating one or more prisms.
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the world > health and disease > healing > ophthalmology or optometry > [noun] > instrumental examination or measurement of eye > instruments used in
optometer1738
opsiometer1842
ophthalmoscope1856
auto-ophthalmoscope1863
ophthalmometer1864
phacoidoscope1864
strabismometer1869
autoscope1873
strabometer1874
perimeter1875
leucoscope1883
retinoscope1883
phacoscope1886
phorometer1888
campimeter1889
prisoptometer1890
scotometer1890
skiascope1892
transilluminator1906
slit lamp1922
anomaloscope1923
gonioscope1925
synoptophore1934
1890 J. S. Billings National Med. Dict. Prisoptometer, an instrument for determining the refraction of the eye by means of the double image produced by looking through a hole in a disc one half of which is covered by the edge of a prism.
1894 A. L. Adams in 27th Bienn. Rep. Illinois Instit. Deaf & Dumb 62 I found Culbertson's Prisoptometer invaluable as a means of diagnosing the amount and various kinds of astigmatism.
1918 Wellsboro (Pa.) Agitator 6 Feb. 5/4 (advt.) Your eyes accurately fitted with the new invention, the prisoptometer.
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).
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n.1890