Tonometer

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Ingenium, 2002.0462.001
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OBJECT TYPE: Ophthalmology/indentation/Schioetz
DATE: Unknown
ARTIFACT NUMBER: 2002.0462.001

MANUFACTURER: A J Co.
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

Serial #: 2020
Part Number: 1
Total Parts: 5
AKA: N/A
Patents: N/A
General Description: metal

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 13.8 cm
Width: 4.4 cm
Height: 1.1 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Medical Technology
Category: Instruments
Sub-Category: N/A

Manufacturer

AKA: AJ
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Quebec
Period: Unknown
Canada: Used by late Dr. A. Isserman, in Montreal PQ.
Function: Used to measure the intraocular pressure.
Technical: Indentation tonometer measures the amount of corneal indentation that occurs when a given weight is placed on the cornea. The result is inversely proportional to the intraocular pressure, and must be obtained from a table of values (missing). Schiotz tonometer is typically supplied with 5.5g weight (permanently fitted to instrument), 7.5 g weight (missing) and 10g weight, and value table (missing). Elevated intraocular pressure is a symptom of various medical disorders, including glaucoma. Designed by Hjalmar August Schiotz, and first demonstrated in 1905, the Schiotz tonometer was quickly adopted and used worldwide. Though still used in both human and veterinary practices (2005), it has largely been replaced by less invasive instruments, which do not employ direct contact with the cornea. (ref. 2)
Area Notes: Unknown

Details

Markings: Tonometer scale graduated 0 to 20, in single increments. "A J Co. 2020" stamped into scale back.
Missing: Tonometer is complete; however, instrument set missing 1 weight (7.5 g) and table of values.
Finish: Brushed and bright silver metal finishes; scale indicator needle has been blued.
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

A J Co., Tonometer, Unknown Date, Artifact no. 2002.0462, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/2002.0462.001/

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