Melbourne Edge test

Catalogue Number: 1407
Melbourne Edge test
Category: Equipment
Sub-Category: Visual Acuity, Contrast sensitivity tests
Designer/inventor: VERBAKEN Jos H
Year Of Publication/Manufacture: 1999
Time Period: 1940 to 1999
Place Of Publication/Manufacture: Melbourne
Publisher/Manufacturer: J Verbaken
Description Of Item: A4 size Kodak photographic paper with gray scale image of 24 numbered circles each divided in half by a difference in contrast that decreases progressively from circle No 1 to circle No 24. The image is identified by the words MELBOURNE EDGE TEST Chart 1 version 2.4.1 Copytight 1986 1999 J Verbaken
Historical Significance: The clinical measurement of contrast sensitivity as a function of spatial frequency was of interest in the 1980s and various groups devised tests that were practical to use in the consulting room. Jos Verbaken, a staff optometrist in the clinic of the Victorian College of Optometry, was one of them. He devised this test to sample very low spatial frequency contrast sensitivity (an edge being of low spatial frequency). He also devised several LogMAR letter charts to measure both high contrast letter acuity and low contast letter acuity (See Cat No 1408). See: Verbaken J Role of the contrast sensitivity function in clinical practice. Am J Optom Physiol Opt. 1987 Apr;64(4):290-5. Verbaken JH, Johnston AW Population norms for edge contrast sensitivity.Am J Optom Physiol Opt. 1986 Sep;63(9):724-32. Verbaken JH, Jacobs RJ. The technical problems of producing photographic prints for the measurement of human contrast thresholds. Ophthalmic Physiol Opt. 1985;5(4):459-65. Greeves AL, Cole BL, Jacobs RJ. Assessment of contrast sensitivity of patients with macular disease using reduced contrast near visual acuity charts. Ophthalmic Physiol Opt. 1988;8(4):371-7. 3. Greeves AL, Cole BL, Jacobs RJ Reliability and validity of simple photographic plate tests of contrast sensitivity. Am J Optom Physiol Opt. 1987 Nov;64(11):832-41.
How Acquired: Donated by Jos Verbaken, optometrist
Date Acquired: Jan 2010
Condition: Excellent
Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 3

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