Method and apparatus for testing for color vision loss

A method for administering a cone contrast color vision test to a patient using a computer, comprising the steps of:

• (a) simultaneously displaying a first color at a first contrast level in a first region of a display and a second color at a first contrast level in a second region of the display, which display is in communication with the computer;
• (b) receiving a first input signal from the patient via an input device in communication with the computer, where the first input signal is indicative of whether the patient recognizes the first color displayed in the first region at the first contrast level;
• (c) displaying the first color at a second contrast level in a third region of the display and the second color at a second contrast level in a fourth region of the display, where the second contrast level of the first color is not equivalent to the first contrast level of the first color;
• (d) receiving a second input signal from the patient via the input device, where the second input signal is indicative of whether the patient recognizes the first color displayed in the third region at the second contrast level;
• and,
• (e) assigning a score to the first and second input signals, the score related to a cone sensitivity of the patient to the first color at the first and second contrast levels.