2007-2008 Basic and Clinical Science Course Section 4: by American Academy of Ophthalmology, Debra J. Shetlar, MD

By American Academy of Ophthalmology, Debra J. Shetlar, MD

Discusses advances within the analysis and category of tumors because it publications the reader via a logical, tissue-specific series that levels from topography via illness strategy to basic and differential prognosis. contains many new colour pathologic and scientific photos and diagrams. Covers wound fix; specimen dealing with, together with processing and marking; and diagnostic strategies. additionally features a record for soliciting for ophthalmic pathologic session.

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Extra resources for 2007-2008 Basic and Clinical Science Course Section 4: Ophthalmic Pathology and Intraocular Tumors

Example text

This pattern is characteristic of viral or chlamydia conjunctiv itis. - A papillary pattern has vessels coming up the center of the tiny elevated lesion and is characteristic of bacterial or allergic conjunctivitis. • The discharge in bacterial conjunctivitis is typically more purulent than the watery discharge of viral conj unctivitis. Thus, there is more "mattering" of the lid margins and associated difficulty in prying the lids open following sleep. • In uncomplicated bacterial conjunctivitis, slit lamp examination reveals a quiet anterior chamber that has not visible cells.

Investigations The cause of trachoma is certain subtypes of chlam ydia trachoma tis, a bacterium tha t can also cause the sexuall y tra nsmitted disease, chlamyd ia. Trachoma spreads through contact with disch arge from the eyes or nose of an in fected person. H ands, clothing, towels and iJ1sects can all be routes for traJ1smission. In the developing countries, flies are a major means of transmission. Differential Diagnosis Some other inflam matory conditions of the cornea and conj unctiva, like Cicatricial Pemphigoid and Stevens-Johnson.

Developmental Abnormalities Figs 3 and 4: Peters anomaly 23 Anterior Segment D iseases Clinical Signs and Symptoms Corneal opacity is always present; it can be central, paracentral, or cOlnplete. Usu ally, no vasc ularization of this opacity occurs; th is data is helpful in distinguish it from other causes of congenital corneal opacity. Some investigators have classified Peters anomaly in two groups: • Type 1: Only 80% of the cases are bilateral. There is n ot a complete corneal op acity; there is only a central or paracentral annular opacity.

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