We describe a near-IR scanning laser ophthalmoscope that allows the retinal cone mosaic to be imaged in the human eye in vivo without the use of wave-front correction techniques. The method takes advantage of the highly directional quality of cone photoreceptors that permits efficient coupling of light to individual cones and subsequent detection of most directional components of the backscattered light produced by the light-guiding effect of the cones. We discuss details of the system and describe cone-mosaic images obtained under different conditions.
© 2004 Optical Society of America
(170.4470) Medical optics and biotechnology : Ophthalmology
(170.5810) Medical optics and biotechnology : Scanning microscopy
(330.5310) Vision, color, and visual optics : Vision - photoreceptors
Brian Vohnsen, Ignacio Iglesias, and Pablo Artal, "Directional imaging of the retinal cone mosaic," Opt. Lett. 29, 968-970 (2004)