1. A wearable device configured to capture eye fundus images, comprising: a support structure configured to be worn by a subject; a display device coupled to the support structure, the display device configured to overlay an overlay image in a field of view of the subject; an image capture device coupled to the support structure, the image capture device configured to capture images of an eye fundus of the subject; and a control module programmed to: instruct the image capture device to capture a plurality of images in a first image capture mode; process at least a portion of the plurality of images to determine a position of a pupil of the subject; and instruct the image capture device to capture an image in a second image capture mode when the position of the pupil is substantially aligned with an optical axis of the image capture device.