Wide-angle ophthalmoscope and fundus camera

A fundus camera comprising a cone member connected through a lens series to a camera, said cone member including a contact lens through which the interior of the eye can be photographed, said contact lens being surrounded by arrays of optical fibers to form an inside ring of optical fibers abutting the surface of said contact lens that contacts a patient's cornea when in use and an outside ring of optical fibers spaced apart from said inside ring, said contact lens having a configuration which enables it to be placed on a cornea, said fibers being oriented within said lens in a predetermined position to form said rings of predetermined radii, the tips of said fibers forming the rings that face a patient's cornea when the fundus camera is in use making a first predetermined angle in said inside ring and a second predetermined angle in said outside ring, the numerical aperture of said fibers, the first predetermined angle of said fibers and the radius of said inside ring being selected so that said inside ring illuminates the central part of the field and leaves the entrance pupil of the observation system free from direct illumination, said second ring of fibers having a radius and being positioned and angled to illuminate the periphery of the field without directly illuminating the entrance pupil.

An ophthalmoscope comprising a contact lens I, a doublet comprised of lenses II and III spaced apart a distance S.sub.1 from said lens I, lens II being a double convex lens in surface contact with a double concave lens III, a singlet double convex lens IV located a distance S.sub.2 from lens III, a doublet comprised of two convex-concavo lens V and VI in surface contact and spaced apart a distance S.sub.3 from lens IV, said lens having the following parameters:

• Abbe Refrac- number Thickness, tive (dis- Lens Radius, R T Space, S Index persion ______________________________________ I R.sub.1 = 8.2 mm T.sub.1 =9.2mm 4.0 mm 2.1 25.6 R.sub.2 = 10.2 mm II R.sub.3 =-3.0737 in T.sub.2 =12 mm 1.85026 32.23 R.sub.4 = 1.3780 in III R.sub.5 = 1.3780 in T.sub.3 = 3 mm S.sub.2 =5 mm 1.5168 64.17 IV R.sub.6 =-3.8189 in T.sub.4 =10 mm S.sub.3 =4 mm 1.4645 65.77 R.sub.7 = 1.5645 in V R.sub.8 = 4.3282 in T.sub.5 = 4 mm 1.5168 64.17 R.sub.9 = 3.6830 in VI R.sub.10 =49.6846 in T.sub.6 = 8 mm 1.7215 29.25. ______________________________________

A lens series for use in conjunction with a 50mm focal length camera comprising a contact lens I, a doublet comprised of lenses II and III spaced apart a distacne S.sub.1 from said lens I, lens II being a double convex lens in surface contact with a double concave lens III, a singlet plano-convex lens IV located a distance S.sub.2 from lens III, a doublet comprised of a convex-concavo lens V in surface contact with a double concave lens IV spaced apart a distance S.sub.3 from lens IV, said lens having the following parameters:

• Abbe Refrac- number Thickness, tive (dis- Lens Radius, R T Space, S Index persion) ______________________________________ I R.sub.1 = 8.2 mm T.sub.1 =9.2 mm 2.1 25.6 R.sub.2 = 10.2 mm II R.sub.3 =1440. in T.sub.2 =20mm S.sub.1 =23mm 1.85026 32.23 R.sub.4 = 44.4 in III R.sub.5 =-59.7 in T.sub.3 = 6mm S.sub.2 =30mm 1.5168 64.17 IV R.sub.6 = .infin. T.sub.4 =15mm S.sub.3 =20mm 1.4645 65.77 R.sub.7 = 66.3 in V R.sub.8 = 165 in T.sub.5 = 6mm 1.5168 64.17 R.sub.9 = 169 in VI R.sub.10 = 94.8 in T.sub.6 =20mm 1.7215 29.25. ______________________________________