Functional retinal imaging with improved accuracy

An apparatus for ophthalmic testing, comprising:

• a display for presenting visual stimuli to an eye;
• a camera for tracking a gaze direction of the eye while the visual stimuli is presented to the eye;
• a controller coupled to the display and the camera, the controller including a machine-readable storage medium storing instructions that, when executed by the controller, will cause the apparatus to perform operations, including:
• sequentially presenting the visual stimuli on the display for measuring a visual function sensitivity of the eye over a field of view;
• monitoring a gaze direction of the eye with the camera to identify when the gaze direction has drifted from a fixation target;
• mapping a first intended retinal position on a retina, which is associated with a first visual stimulus of the visual stimuli, to an offset retinal position that is actually stimulated by the first visual stimulus due to a drifting of the gaze direction, wherein the mapping compensates for the drifting of the gaze direction from the fixation target when the gaze direction is determined to have drifted during presentation of the first visual stimulus, wherein the first intended retinal position is stimulated by the first visual stimulus on the display when the gaze direction is aligned with the fixation target;
• and
• registering user inputs indicating whether the user acknowledges observance of each of the visual stimuli presented.