A machine vision method for automated alignment of fundus imaging systems.

Background And Objective: To report a method to track the pupil in three axes simultaneously prior to imaging the fundus.

Patients And Methods: The system is based on parallax optical alignment to detect the center of the pupil. The system consists of two cameras acquiring pupil images from two distinct directions and an operator-supervised algorithm to derive the coordinates of the pupil center and output of commands to drive a three-axes computer-controlled stage.