2011-2012 Basic and Clinical Science Course, Section 8: by James J. Reidy MD PDF

By James J. Reidy MD

ISBN-10: 1615251154

ISBN-13: 9781615251155

Discusses the constitution and serve as of the cornea and exterior eye and experiences suitable exam strategies. Covers infectious and ocular floor ailments, problems and surgical procedure of the ocular floor, immune-mediated and neoplastic problems, congenital anomalies and degenerations. A lately up to date bankruptcy at the genetics of corneal dystrophies displays the recent IC3D type. Discusses poisonous and worrying accidents and corneal transplantation. comprises many new colour pictures. lately revised 2010 2011.

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Extra info for 2011-2012 Basic and Clinical Science Course, Section 8: External Disease and Cornea (Basic & Clinical Science Course)

Example text

Reproduced with permission from The definition and classification of dry eye disease: report of th e Definition and Classificalion Subcommittee of the International Dry Eye WorkShop (2007). Ocul Surf. ) center of Fig 3-2). Low humidity and high air now help increase evaporative loss, which may be caused clinically, in particular, by meibomian gland dysfunction (MGD), which leads to an unstable teadilm lipid layer. The quality of eyelid oil is modified by the action of esterases and li pases released by normal eyelid commensals, whose numbers are increased in blepharitis.

Central corneal thi ckness in the Ocular Hypertension Treat ment Study (O HTS). Ophthalmology. 2001; 108:1779- 1788. O ptical pachometry can be performed using a device that attaches to the slit-lamp biomicroscope, but the device is somewhat imprecise. Ultrasonic pachometry is both easier and more accurate. Instrumentation is based on the speed of sound in the normal cornea (1640 m/sec). The applanating tip must be perpendicular to the surface because errors are induced by tilting. Improved Signal processing and other methods, such as lase r interferometry, allow the examiner to map the corneal thickness very precisely.

Brandt JD. Corneal thickness in glaucoma screening, diagnosis, and management. 2004;15(2}:85-89 . Doughty M], Zaman ML. Hu man corneal thickness and its impact on in traocular pressure measures: a review and meta -analysis approach. Surv Ophthalmol. 2000;44(5):367-408. Esthesiometr Esthesiometry is the measurement of corneal sensation, which is a function of the ophth almic branch of cranial nerve V. Its primary use is in the evaluation of neurotrophic keratopathy. In most clinical circumstances) reduced corneal sensitivity can be diagnosed qualitatively without special instruments, but quanti tative esthesiometry is useful in unusual cases and for research.

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2011-2012 Basic and Clinical Science Course, Section 8: External Disease and Cornea (Basic & Clinical Science Course) by James J. Reidy MD


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