constellaton,
If you go to the CASA website, under Aviation Medicals, then under search for a Medical Examiner, then select DAMEs approved to conduct medicals for Overseas Flight Crew Licensing Authorities. You will find out doctors approved to do FAA Medicals.
You have a few options in Sydney.
The FAA medical is straight forward, you normally need to do part of it online before seeing the doctor. The FAA has 8 different tests that can be used.
Aerospace Medical Dispositions
Item 52. Color Vision
An applicant does not meet the color vision standard if testing reveals:
All Classes
Seven or more errors on plates 1-15 of the AOC (1965 edition) pseudoisochromatic plates.
AOC-HRR (second edition): Any error in test plates 7-11. Because the first 4 plates in the test book are for demonstration only, test plate 7 is actually the eleventh plate in the book. (See instruction booklet.)
Seven or more errors on plates 1-15 of Dvorine pseudoisochromatic plates (second edition, 15 plates.)
Six or more errors on plates 1-11 of the concise 14-plate edition of the Ishihara pseudoisochromatic plates. Seven or more errors on plates 1-15 of the 24-plate edition of Ishihara pseudoisochromatic plates. Nine or more errors on plates 1-21 of the 38-plate edition of Ishihara pseudoisochromatic plates.
Seven or more errors on plates 1-15 of the Richmond (1983 edition) pseudoisochromatic plates.
Farnsworth Lantern test: An average of more than one error per series of nine color pairs in series 2 and 3. (See instruction booklet.)
Any errors in the six plates of the Titmus Vision Tester, the Titmus II Vision Tester, the Titmus 2 Vision Tester, the OPTEC 2000 Vision Tester, the OPTEC 900 Vision Tester the Keystone Orthoscope, or Keystone Telebinocular.
LKC Technologies, Inc., APT-5 Color Vision Tester. The letter must be correctly identified in at least two of the three presentations of each test condition. (See APT-5 screening chart for FAA-related testing in instruction booklet.)