Ocular surface influences on corneal topography.
The shape of a cornea, as measured by corneal topography, can be influenced by a variety of factors. Direct and obvious influences on corneal shape include corneal pathology, corneal surgery, and contact lenses. With the modern and widespread use of computerized videokeratoscopy, subtle topographic changes from other external and systemic influences can now be detailed. The purpose of this review is to examine ocular surface influences and indirect surgical, pathological, and pharmacological factors that affect the corneal shape and acquired topographic maps. The clinical consequences of altered corneal topography will be highlighted throughout.
Szczotka-Flynn
Loretta
L
Department of Ophthalmology, University Hospitals of Cleveland and Case Western Reserve University, Cleveland, Ohio 44106, USA. loretta.szczotka@uhhs.com