2008-2009 Basic and Clinical Science Course: Section 11: by James C. Bobrow, MD

By James C. Bobrow, MD

This part underwent significant revision for the 2008-2009 version. part eleven stories the anatomy, body structure, embryology, and pathology of the lens. It additionally covers the epidemiology of cataracts and their evaluate and administration in adults. furthermore, an outline of lens and cataract surgical procedure is supplied, issues of cataract surgical procedure are mentioned, and cataract surgical procedure in particular occasions is explored. includes many new photographs.

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Additional resources for 2008-2009 Basic and Clinical Science Course: Section 11: Lens and Cataract (Basic and Clinical Science Course 2008-2009)

Sample text

The lens opacities may progress and further impair vision. Poor zonular integrity and ectopia lentis have also been reported in patients with aniridia. Congenital and Infantile Cataract The term congenital cataract refers to a lens opacity present at birth. Lens opacities that develop during the first year of life are called infantile cataracts. Becausesome lens opacities escape detection at birth and are noted only on later examination, these terms are used interchangeably by many physicians. Congenital and infantile cataracts are fairly common, occurring in 1 of every 2000 live births.

It marks the place where the hyaloid artery came into contact with the posterior surface of the lens in utero. Sometimes a Mittendorf dot is associated with a fibrous tail or remnant of the hyaloid artery projecting into the vitreous body. Epicapsular Star Another very common remnant of the tunica vasculosa lentis is an epicapsular star (Fig 4-6). As its name suggests, it consists of a star-shaped distribution of tiny brown or golden flecks on the central anterior lens capsule. It may be unilateral or bilateral.

Dislocation into the anterior chamber or pupil may cause pupillary block and angle-closure glaucoma. Dislocation of the lens posteriorly into the vitreous cavity often has no adverse sequelae. Trauma is the most common cause of acquired lens displacement. Nontraumatic ectopia lentis is commonly associated with Marfan syndrome, homocystinuria, aniridia, and congenital glaucoma. Less frequently, it appears with Ehlers- Danlos syndrome, hyperlysinemia, and sulfite oxidase deficiency. Ectopia lentis may occur as an isolated anomaly (simple ectopia lent is), usually inherited as an autosomal dominant trait.

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