Apparatus and method for non-contact examination of eye

An apparatus for non-contact examination of an eye, wherein the examination apparatus comprises, for illuminating and imaging the eye, an apparatus objective of a positive optical power and a positive spherical aberration and a secondary lens unit;

• the apparatus objective is common to the imaging and the illumination the optical paths
• the apparatus objective is configured to have an image plane of an exit pupil of the illumination and an entrance pupil of the imaging within the eye, an image of the exit pupil of the illumination and an image of the entrance pupil on said image plane being distorted by the positive spherical aberration, and illuminate and image an angle wider than a cross section of the zone I of the retinal vasculature,
• the apparatus is configured to separate the optical paths of the imaging and illumination at least on frontal and rear surfaces of the crystalline lens by deviation of the imaging and illumination optical paths from each other, cross sections of the optical paths on the frontal and rear surfaces of the crystalline lens being fully illuminated areas side by side;
• and
• the secondary lens unit is located behind the apparatus objective in the optical path in a direction of the imaging, is configured to modify at least one of the following optical features:
• lateral color aberration, astigmatism, field curvature and coma caused by the apparatus objective, and focus the imaging radiation modified by the secondary lens unit on an image sensor for forming an image of a retina of the eye.