A system may include: a planar surface (110, 510, 610) on which to render visual content (124, 524, 624) to a user positioned at distance from the planar surface; a camera (112, 512, 612); one or more processors (106, 506, 606); and memory (108, 508, 608) operably coupled with the one or more processors. The memory may store instructions that cause the one or more processors to: identify a portion (132) of the user's fundus to be targeted by the camera; calculate a target position on the planar surface that, when focused on by the user, causes the identified portion of the user's fundus to be within a field of view (122) of the camera; render a graphical element (124) at the target position; and while the graphical element is rendered at the target position, cause the camera to capture an image of the targeted portion of the user's fundus.
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