Abstract: A fundus camera is provided with a focus aid mark projection system (5, 9, 10, 11, 12, 13) that includes a focus aid mark focussing lens (10) and other optical components such that the focus aid mark focussing lens (10) is attached to the focussing lens (6) of the imaging system and moves with that lens, thereby maintaining the focal planes of the focus aid mark projection system and the imaging system co-planar. An associated alignment mark projection system (35, 34, 33, 32) includes optics that utilize part of the existing fundus camera illumination system (35) to project a plurality of alignment marks onto the iris of the subject eye.

Abstract: A fundus camera is provided with auxiliary optical components and a plurality of projected alignment marks, wherein the alignment marks are in focus and coincident on the iris of the eye when the fundus camera is correctly aligned and the auxiliary optical components allow the alignment marks to be observed as an anterior view in focus, replacing part of the view of the eye fundus which is also in focus in the same view. The auxiliary view optical components may be linked to the focus of the observation system and the associated projected focus indicating marks such that all remain in adequate focus to enable the alignment and focus of the fundus camera to be performed satisfactorily.

Abstract: A fundus camera is provided with a focus aid mark projection system (5, 9, 10, 11, 12, 13) that includes a focus aid mark focussing lens (10) and other optical components such that the focus aid mark focussing lens (10) is attached to the focussing lens (6) of the imaging system and moves with that lens, thereby maintaining the focal planes of the focus aid mark projection system and the imaging system co-planar. An associated alignment mark projection system (35, 34, 33, 32) includes optics that utilise part of the existing fundus camera illumination system (35) to project a plurality of alignment marks onto the iris of the subject eye.

Abstract: A fundus camera is provided with auxiliary optical components and a plurality of projected alignment marks, wherein the alignment marks are in focus and coincident on the iris of the eye when the fundus camera is correctly aligned and the auxiliary optical components allow the alignment marks to be observed as an anterior view in focus, replacing part of the view of the eye fundus which is also in focus in the same view. The auxiliary view optical components may be linked to the focus of the observation system and the associated projected focus indicating marks such that all remain in adequate focus to enable the alignment and focus of the fundus camera to be performed satisfactorily.