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Bishop Harman diaphragm test apparatus
https://mhc.andornot.com/en/permalink/artifact8317
Dates
1940
1960
circa 1940-1960
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Vision
Classification
Vision Tests
Vision
Optometry
Accession Number
1984.10.2
Description
A diaphragm apparatus mounted with handle and support piece and 22 test cards; boxed.
More detail
1 image
Accession Number
1984.10.2
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Vision
Classification
Vision Tests
Vision
Optometry
MeSH Heading
Vision Tests
Description
A diaphragm apparatus mounted with handle and support piece and 22 test cards; boxed.
Part Names
box - Length 43.2 cm x Width 11.4 x Depth 5.7 cm
apparatus - Length 41.9 cm
Provenance
Acquired from the Academy of Medicine; source: Mrs. C. A. McRae; used by Dr. C. A. McRae, G. P. in Thornhill, Ont. 1930s-1983.
Maker
Ingram & Bell Ltd.
Site Made (City)
Toronto
Site Made (State)
Ontario
Site Made (Country)
Canada
Dates
1940
1960
circa 1940-1960
Material
metal
Paper
Permanent Location
Storage Room 0010
0010-E4-10
Copy Type
Original
Research Facts
Bishop Harman (1869-1945) was a London ophthalmologist; this is a device for indicating the capacity for fusing the visual images; the cards are viewed through a diaphragm that is closed slowly.
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