Proposed classification for topographic patterns seen after penetrating keratoplasty.

Proposed classification for topographic patterns seen after penetrating keratoplasty. Research Abstract Details 

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Proposed classification for topographic patterns seen after penetrating keratoplasty. Abstract Text:

AIMS: To create a clinically useful classification for post-keratoplasty corneas based on corneal topography. METHODS: A total of 360 topographic maps obtained with the TMS-1, from 95 eyes that had undergone penetrating keratoplasty (PKP), were reviewed independently by two examiners in a masked fashion, and were categorised according to a proposed classification scheme. RESULTS: A high interobserver agreement (88% in the first categorisation) was achieved. At 12 months post-PKP, a regular astigmatic pattern was observed in 20/85 cases (24%). This was subclassified as oval in three cases (4%), oblate symmetric bow tie in six cases (7%), prolate asymmetric bow tie in six cases (7%), and oblate asymmetric bow tie in five cases (6%). An irregular astigmatic pattern was observed in 61/85 cases (72%), subclassified as prolate irregular in five cases (6%), oblate irregular in four cases (5%), mixed in seven cases (8%), steep/flat in 11 cases (13%), localised steepness in 16 cases (19%), and triple pattern in three cases (4%). Regular astigmatic patterns were associated with significantly higher astigmatism measurements. The surface asymmetry index was significantly lower in the regular astigmatic patterns. CONCLUSIONS: In post-PKP corneas, the prevalence of irregular astigmatism is about double that of regular astigmatism, with a trend for increase of the irregular patterns over time.

Proposed classification for topographic patterns seen after penetrating keratoplasty. Publishing Authors By Initials

For similar pathological conditions, signs and symptoms: pathologic processes: postoperative complications research abstracts see: pathological conditions, signs and symptoms: pathologic processes: postoperative complications research

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Proposed classification for topographic patterns seen after penetrating keratoplasty. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The British journal of ophthalmology

VOLUME: 83

Page Numbers: 403-9

Journal Abbreviation: Br J Ophthalmol

ISSN: 0007-1161

DAY: 28

MONTH: Apr

YEAR: 1999

Proposed classification for topographic patterns seen after penetrating keratoplasty. Information

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LANGUAGE: eng

NlmUniqueID: 421041

Proposed classification for topographic patterns seen after penetrating keratoplasty. Keywords Mesh Terms:

KEYWORDS: Postoperative Complications

MESH TERMS: pathology

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Grant and Affiliation Information for Proposed classification for topographic patterns seen after penetrating keratoplasty.

AFFILIATION: Department of Ophthalmology, Bristol Eye Hospital.

Country: ENGLAND

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MEDLINETA: Br J Ophthalmol

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