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Sample imaging apparatus and video frames of 32-week, 6-day gestational aged neonate. (a) The imaging device consisted of a PanOptic ophthalmoscope using a Welch Allyn iExaminer attached to an iPhone 6 Plus. Sample raw video frames show (b) a frame, with a clear eye region, that was chosen by the automatic method, (c) frame with no eye, (d) frame with closed eye, and (e) frame with eye out of focus.
