Measuring dark adaptation

A method for measuring dark adaptation characteristics comprising:

• exposing at least one eye of a patient to a light source to bleach a retinal location of the at least one eye by increasing brightness of a display on a display device while presenting one or more moving targets on the display;
• displaying to the at least one eye on the display device a figure with a luminance and waiting until the patient communicates with the display device to acknowledge that the patient can see the figure;
• measuring and recording a level of the luminance and a time period between first displaying the figure and the patient communicating with the display device;
• continuing to display additional figures with decreasing luminance one at a time until the patient communicates with the display device to acknowledge that the patient can see each additional figure and to measure and record each decreasing luminance and each time period between first displaying each additional figure and the patient communicating with the display device until either a maximum allowable time period has expired or an additional figure with a lowest possible luminance has been displayed by the display device and acknowledged by the patient;
• and
• determining, by a processor, dark adaptation measurements of the at least one eye based on the measured and recorded luminance and time periods.