Title 49

PART 242 APPENDIX D



Appendix D to Part 242 - Medical Standards Guidelines

49:4.1.1.1.36.8.137.1.106 : Appendix D

Appendix D to Part 242 - Medical Standards Guidelines

(1) The purpose of this appendix is to provide greater guidance on the procedures that should be employed in administering the vision and hearing requirements of § 242.117.

(2) In determining whether a person has the visual acuity that meets or exceeds the requirements of this part, the following testing protocols are deemed acceptable testing methods for determining whether a person has the ability to recognize and distinguish among the colors used as signals in the railroad industry. The acceptable test methods are shown in the left hand column and the criteria that should be employed to determine whether a person has failed the particular testing protocol are shown in the right hand column.

Accepted tests Failure criteria
Pseudoisochromatic Plate Tests
American Optical Company 1965 5 or more errors on plates 1-15.
AOC - Hardy-Rand-Ritter plates - second edition Any error on plates 1-6 (plates 1-4 are for demonstration - test plate 1 is actually plate 5 in book).
Dvorine - Second edition 3 or more errors on plates 1-15.
Ishihara (14 plate) 2 or more errors on plates 1-11.
Ishihara (16 plate) 2 or more errors on plates 1-8.
Ishihara (24 plate) 3 or more errors on plates 1-15.
Ishihara (38 plate) 4 or more errors on plates 1-21.
Richmond Plates 1983 5 or more errors on plates 1-15.
Multifunction Vision Tester
Keystone Orthoscope Any error.
OPTEC 2000 Any error.
Titmus Vision Tester Any error.
Titmus II Vision Tester Any error.