American journal of ophthalmology · 1996
Tangential vs sagittal videokeratographs in the "early" detection of keratoconus.
Клинический случайСравнительное исследованиеСтатьяПоддержка службы здравоохранения СШАНазвание и аннотация: Перевод пока не подготовлен
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Rabinowitz Y S
Аннотация
PURPOSE: To illustrate the difference between tangential and sagittal videokeratographs in the "early" (subclinical) detection of keratoconus.
METHODS: The clinically normal fellow eye of a patient with unilateral keratoconus was studied with a topographer, which can display both a sagittal and a tangential map on the same page using the same color scale.
RESULTS: The tangential map depicted a pattern more consistent with keratoconus and provided a maximum power of 51 diopters compared with the 46 diopters of the sagittal map.
CONCLUSIONS: Tangential videokeratographs, derived from instantaneous radius of curvature algorithms, may be more useful than sagittal displays for detecting subtle corneal topographic abnormalities.
METHODS: The clinically normal fellow eye of a patient with unilateral keratoconus was studied with a topographer, which can display both a sagittal and a tangential map on the same page using the same color scale.
RESULTS: The tangential map depicted a pattern more consistent with keratoconus and provided a maximum power of 51 diopters compared with the 46 diopters of the sagittal map.
CONCLUSIONS: Tangential videokeratographs, derived from instantaneous radius of curvature algorithms, may be more useful than sagittal displays for detecting subtle corneal topographic abnormalities.