21. Insertion of an intraocular lens for the treatment of cataracts is the most commonly performed eye surgical procedure. 22. In 1993, there were 15, 000 cataract surgeries performed in Nepal, only 1000 of which utilized intraocular lenses . 23. In India, modern surgery with intraocular lens insertion in government-and NGO-sponsored Eye Surgical camps has replaced older surgical procedures. 24. Between 1993 and 1997 Ray Avery designed and commissioned two state-of-the-art intraocular lens laboratories in Eritrea and in Nepal. 25. A more drastic measure is the insertion of an opaque intraocular lens to obscure the vision of one eye. 26. In 1987, acrylic intraocular lens , underwent cataract surgery and the implantation of such a lens to restore his sight. 27. The ICL is a posterior chamber, phakic intraocular lens used for the correction of moderate to high refractive errors. 28. Sightsavers also set up training courses in new surgical techniques and supported the manufacture of replacement intraocular lenses in India. 29. In the 1990s he underwent successful bilateral intraocular lens implantation at St Thomas's Hospital by surgeon Mr . Michael Falcon. 30. High intensity ultraviolet light can harm the retina, and artificial intraocular lenses are therefore manufactured to also block ultraviolet light.
