Cataracts and Cataract Operations (First of Two Parts)* THOMAS J. LIESEGANG, M.D.  Mayo Clinic Proceedings  Volume 59, Issue 8, Pages 556-567 (August 1984) DOI: 10.1016/S0025-6196(12)61494-3 Copyright © 1984 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 1 Diagram of anatomy of the eye, with special emphasis on structures affected by cataract surgical procedures. Mayo Clinic Proceedings 1984 59, 556-567DOI: (10.1016/S0025-6196(12)61494-3) Copyright © 1984 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 2 Types and locations of cataracts. A, Congenital zonular cataract in various layers of lens nucleus. B, Congenital coronary cataract in cortex of lens. C, Common nuclear sclerotic cataract of aging. D, Posterior subcapsular cataract, frequently seen in middle-aged persons, E, Immature cortical cataract with beginning hydration of lens. F, Total white opacification of cortex with mature or “ripe” cataract. G, Morgagnian cataract with totally liquefied cortex and floating nucleus. H, Hypermature cataract with wrinkled capsule and loss of cortical fluid. Mayo Clinic Proceedings 1984 59, 556-567DOI: (10.1016/S0025-6196(12)61494-3) Copyright © 1984 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 3 Methods of optical correction of aphakia. A, Thick aphakic spectacles worn in front of eye. B, Contact lens worn on surface of eye. C, Intraocular lens placed within eye. D, Refractive keratomileusis of cornea to correct aphakia. E, Refractive keratophakia with use of donor lenticule to alter refraction of cornea. F, Epikeratophakia with donor lenticule sutured onto surface of cornea. Mayo Clinic Proceedings 1984 59, 556-567DOI: (10.1016/S0025-6196(12)61494-3) Copyright © 1984 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 4 Styles of intraocular lenses. A, Different anterior chamber lenses for implantation after intraocular cataract extraction or extracapsular cataract extraction. B, Different iris clip lenses for implantation after intracapsular cataract extraction or extracapsular cataract extraction. C, Posterior chamber lenses for implantation after extracapsular cataract extraction only. D, “Universal” lens for implantation in anterior chamber (after extracapsular cataract extraction or intracapsular cataract extraction) or in posterior chamber (after extracapsular cataract extraction). Mayo Clinic Proceedings 1984 59, 556-567DOI: (10.1016/S0025-6196(12)61494-3) Copyright © 1984 Mayo Foundation for Medical Education and Research Terms and Conditions