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Adriana Ribeiro De Almeida, Rayssa Medeiros Léda, Eduardo Damous Fontenelle Feijó, Augusto Pereira, André Pena Corrêa Bittencourt; Evaluation of corneal tomography parameters with Pentacam. Invest. Ophthalmol. Vis. Sci. 2017;58(8):3543.
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© ARVO (1962-2015); The Authors (2016-present)
To analyze corneal tomography parameters with Pentacam in patients cared for at Ophthalmology Hospital of Anápolis.
This cross-sectional study analyzed data from Pentacam (Oculus Optikgeräte GmbH, Wetzlar, Germany) of 90 patients (180 eyes), who had this exam at Ophthalmology Hospital of Anápolis from July 2015 to August 2016. Inclusion criteria: age between 12 and 80 years. Exclusion criteria: previous eye surgery. A triage was performed using the KISA% index, in which a percentage of 60% or less indicates the absence of keratoconus, between 60 and 100% indicates suspected keratoconus and greater than or equal to 100% indicates keratoconus (KCN). Several parameters acquired from Pentacam were analyzed and differences between the KCN and KCN-suspect groups and the normal group were assessed.
There were 20 males (22.2%) and 70 females (77.8%) in the group of 90 patients with a mean age of 36.43 years (SD 14.0 years). The study showed that 81.1% of eyes had no KCN according to the KISA% index, 6.1% had suspected KCN and 12.8% had KCN. There was a significant difference in steep keratometry (K2), maximum axial curvature (Kmax), thinnest corneal location (Pachy Min), thickness at the apex of the cornea (Paqui Apex), Y coordinate of the thinnest corneal location (TLY), asphericity coefficient (QV), progress index maximum (ProgMax) and average (ProgAvg), Ambrosio relational thickness maximum (ARTmax), posterior elevation (PE) in patients with KNC compared to the normal group (p < 0.05). As for the KCN-suspect group, only Kmax, ProgMax and ARTmax were statistically significant compared to the normal group (p < 0.05).
The corneal tomography analysis with Pentacam in this study showed a statistically significant difference between the Pentacam parameters in patients with KCN and suspected KCN compared to patients with normal eyes.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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