Kingston General Hospital O.P.D. Clinic Collection
Category
Diagnostic & Treatment Artifacts
Vision
Classification
Ophthalmology
Vision
Accession Number
998021002
Description
Ophthalmoscope head, which consists of a round metal disc with a rotating plastic dial set inside; the disc is attached to a cylindrical piece that has an open round metal base which has a round knob above it that allows the piece to be put onto a handle and tightened on; there is an attached round…
Ophthalmoscope head, which consists of a round metal disc with a rotating plastic dial set inside; the disc is attached to a cylindrical piece that has an open round metal base which has a round knob above it that allows the piece to be put onto a handle and tightened on; there is an attached round piece on the back of the disc; this has a knob on the top that moves right and left and operates a "white-line" grid and a "red-free" filter; there is a piece of bevelled glass inside this attached piece; the glass lines up with a pin hole that goes through the metal disc; the glass that can be seen through the pin hole changes as the plastic dial is turned; numbers on the disc indicate the glass type
Number Of Parts
1
Provenance
Owned and used at Kingston General Hospital (Emergency).
Raised lettering on the front reads, "WELCH ALLYN // PAT. NO. // 2027663"; raised lettering on the back reads "PATENT NO. // 2311503 // WACO NO. 110 // AUBURN N.Y. // U.S.A."; the back also has the word "Emerg" scratched into it
Permanent Location
Storage Room 0010
0010-E4-6
Dimension Notes
Length 8.0 cm. x Width 4.2 cm. x Depth 2.5 cm
Condition Remarks
All pieces of the ophthalmoscope head appear to be complete, although the round attachment on the back is a bit loose; the disc shows minor wear; the plastic dial moves freely; no corrosion is visible
Copy Type
Original
Reference Types
Book
Reference Comments
"Hospital and Physicians Equipment and Supplies," by The J. F. Hartz Co. Ltd., 1960, p. 194 - see 8-110
Research Facts
ophthalmoscope [of-thal´mo-skop] an instrument for examining the interior of the eye. Direct ophthalmoscope one that produces an upright, or unreversed, image of approximately 15 times magnification. The direct ophthalmoscope is used to inspect the fundus of the eye, which is the back portion of the interior eyeball. Examination is best carried out in a darkened room. The examiner looks for changes in the color or pigment of the fundus, changes in the caliber and shape of retinal blood vessels, and any abnormalities in the macula lutea, the portion of the retina that receives and analyzes light only from the very center of the visual field. Macular degeneration and opacities of the lens can be seen through direct ophthalmoscopy.