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.