•A normal fundus camera use white led source (often LED) to illuminate the full retina and then images the reflected light with a CCD camera. The disadvantage is that it is difficult to get sufficient light onto the retina, this requires larger (>3.8mm) pupils, to function and often the image quality is limited by spurious reflections from for example the cornia.
The SLO technology used in the EasyScan circumvents these problems. The image is build up by scanning a line of laser light over the retina and image that on a line sensor. This optical design is more efficient and allows imaging through very small pupils (1.5mm). Furthermore, only the light reflected from the retina is detected, resulting in clear and more high contrast images.