Flicker comparison of fundus photographs. A technical note.
A method for comparison of two fundus transparencies by means of alternating flickering light is described. Spurious differences between the pictures are reduced by making the exposures in a fixed position of the pulse cycle. Small haemorrhages are readily detected. Pulse variations of the vessels and changes in size of cup and disc can be measured.
D005425:Flicker Fusion; D005451:Fluorescein Angiography / Q000379:methods*; D006801:Humans