By American Academy of Ophthalmology, James C. Bobrow MD
Studies the anatomy, body structure, embryology and pathology of the lens. Covers the epidemiology, review and administration of cataracts and offers an outline of lens and cataract surgical procedure, together with distinct events. part eleven additionally walks the reader via making a suitable differential prognosis and designing a administration plan for intraoperative and postoperative issues of cataract surgery.
Upon of completion of part eleven, readers can be capable to:
Identify congenital anomalies of the lens
List kinds of congenital and purchased cataracts
Describe the organization of cataracts with getting older, trauma, drugs, and systemic and ocular diseases
Describe the review and administration of sufferers with cataract and different lens abnormalities
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Extra info for 2014-2015 Basic and Clinical Science Course (BCSC): Section 11: Lens and Cataract
B, Anterior polar cataract viewed by retroillumination. F • CHAPTER 3: Embryology and Developmental Defects • 33 • Sutural The sutural, or stellate, cataract is an opacification of the Y-sutures of the fetal nucleus. It usually does not impair vision (Fig 3-11). These opacities often have branches or knobs projecting from them. Sutural cataracts are bilateral and symmetric and are frequently inherited in an autosomal dominant pattern. Coronary Coronary cataracts are so named because they consist of a group of dub-shaped cortical opacities that are arranged around the equator of the lens like a crown, or corona.
In addition, both vitamin E and ascorbic acid are present in the lens. Each of these substances can act as a free radical scavenger and thus protect against oxidative damage. Increasing oxygen levels within the eye may have a role in cataract formation. Exposure of the lens to an increased level of oxygen during long-term hyperbaric oxygen therapy leads to a myopic shift, increased opacification of the lens nucleus, and, in many cases, the formation of nuclear cataracts. The lens is also exposed to increased levels of oxygen acutely during retinal surgery and chronically following vitrectomy.
2nd ed. St Louis: Mosby; 1994:336-373. Lambert S. Lens. In: Taylor D, ed. Paediatric Ophthalmology. 2nd ed. Boston: Blackwell Science; 1997:445-476. Shortt AJ, Lanigan B, O'Keefe M. Pars plana lensectomy for the management of ectopia lentis in children. J Pediatr Ophthalmol Strabismus. 2004;41(5):289-294. Streeten BW. Pathology of the lens. In: Albert DM, Jakobiec FA, eds. Principles and Practice of Ophthalmology. 2nd ed. Philadelphia: Saunders; 2000:3685-3749. • CHAPTER 4 . Pathology Age-Related Lens Changes As the lens ages, it increases in mass and thickness and decreases in accommodative power.
2014-2015 Basic and Clinical Science Course (BCSC): Section 11: Lens and Cataract by American Academy of Ophthalmology, James C. Bobrow MD