Aspherical Optical System (AOS) - exclusively from HEINE
eliminates corneal and iris reflexes to provide large, crisp and glare-free fundus images.
 Flat, elliptical illumination beam produced by HEINE’s Aspherical Optical System.
 Observation path.
 Redirected iris and corneal reflexes.
 The elliptical light beam enters through the lower half of the cornea. The illumination beam has been separated from the observation beam (Gullstrand-Principle). All reflexes are diverted away from the observation beam due to the curvature of the reflective cornea. Due to the flat, compressed form of the light beam, a maximum amount of light enters through the pupil.
 Once past the anterior chamber, the light beam opens up dramatically to illuminate a large area of the retina.