Human retina imaging: widening of high resolution area

In this paper we consider different methods of widening high resolution retinal image area. The first method is based on compensation of an average phase of two beacons formed on human retina within the isoplanatic patch. The second one is based on compensation of external corneal surface refraction with the help of immersion liquid. In both methods we use a single wavefront corrector conjugated to the pupil plane. The immersion method was found to be the most appropriate as it allows one to increase the area of high resolution almost twice without loss of image quality.