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2014-2015 Basic and Clinical Science Course (BCSC): Section by American Academy of Ophthalmology, James C. Bobrow MD

By American Academy of Ophthalmology, James C. Bobrow MD

Reports the anatomy, body structure, embryology and pathology of the lens. Covers the epidemiology, assessment and administration of cataracts and provides an summary of lens and cataract surgical procedure, together with specific events. part eleven additionally walks the reader via making a suitable differential analysis and designing a administration plan for intraoperative and postoperative problems of cataract surgery.

Upon of entirety of part eleven, readers will be capable to:

Identify congenital anomalies of the lens
List different types of congenital and bought cataracts
Describe the organization of cataracts with getting older, trauma, drugs, and systemic and ocular diseases
Describe the overview and administration of sufferers with cataract and different lens abnormalities

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Additional resources for 2014-2015 Basic and Clinical Science Course (BCSC): Section 11: Lens and Cataract

Example text

Globules of eosinophilic material (morgagnian globules) are observed in slitlike spaces between lens fibers. Posterior Subcapsular Cataracts Posterior subcapsular cataracts (PSCs) are often seen in patients younger than those presenting with nuclear or cortical cataracts. PSCs are located in the posterior cortical layer Figure 4-3 Vacuoles in early cortical cataract development. -diameterincreased Figure 4-4 A, Cortical cataract viewed by retroillum ination . B, Schematic of immature cortical cataract.

Capsular Capsular cataracts are small opacifications of the lens epithelium and anterior lens capsule that spare the cortex. They are differentiated from anterior polar cataracts by their Figure 3-11 Sutural cataract. ,.. 34 • Lens and Cataract • Figure 3-12 A cerulean cataract consists of small bluish opacities in the cortex. (Courtesy of Karla J. Johns. ) Figure 3-13 Congenital nuclear cataract. (Reproduced from Day SH. Understanding and Preventing Amblyopia Eye Care Skills for the Primary Care Physician Series {slidescript}.

The ciliary muscle is a ring-shaped muscle that, on contraction, has the opposite effect from that intuitively expected of a sphincter. When a sphincter muscle contracts, it usually tightens its grip. However, when the ciliary muscle contracts, the diameter of the muscle ring is reduced, thereby relaxing the tension on the zonular fibers and allowing the lens to become more spherical. Thus, when the ciliary muscle contracts, the axial thickness of the lens increases, the diameter of the lens decreases, and the dioptric power of the eye increases, producing accommodation.

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