Retrospective Review of Incidence of Abnormal Corneal Topography in Patients Scheduled for Cataract Surgery
Narrative Responses:
Purpose
To determine the incidence of abnormal topography in patients scheduled for cataract surgery.
Methods
400 consecutive topographies of patients that underwent cataract surgery at a single center by a single surgeon were evaluated in a masked fashion. The reviewer was provided with the topography from a single eye with no additional information, and required to classify the topography into normal, FFKC, Pellucid, keratoconus, post-myopic refractive surgery, post-hyperopic refractive surgery, or irregular astigmatism (such as caused by dry eyes).
Results
A total of 400 topographies were reviewed in a masked fashion with no additional information provided. A total of 30.7% were classified as "not normal." 8.7% were classified as significant irregular astigmatism consistent with dry eye, EBMD, or another cause. 5.7% were classified as having mild asymmetric astigmatism. 5.5% were classified as FFKC, Keratoconus or Pellucid pattern. 2.7% had superior steepening consistent with superior FFKC or superior keratoconus. 8% had topographic maps consistent with previous corneal refractive surgery. Only 69.3% were classified as being "not abnormal".
Conclusion
A high prevalence of abnormal topography is present in patients undergoing cataract surgery.