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Evaluation of Anterior Chamber Biometric Properties of Keratoconic Eyes in Various Stages of Keratoconus

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First Author: G.Sahn Vural TURKEY

Co Author(s):    M. Koru   C. Guler                 

Abstract Details

Purpose:

To estimate the anterior chamber biometric properties in keratoconus patients according to the keratoconus grading.

Setting:

Balıkesir University Medical Faculty, Department of Ophthalmology.

Methods:

133 eyes of 133 keratoconus patients were evaluated. All subjects were graded and grouped according to Amsler Krumeich Classification. In addition to a routine ophthalmologic examination, central corneal thickness (CCT), minimum CCT, horizontal visible iris diameter (HVID), anterior chamber depth (ACD), anterior chamber volume (ACV), iridocorneal angle, and corneal volume (CV) were recorded via Scheimpflug topography system (CSO Sirius, Italy). All parameters were compared in groups which are described according to the different stages of keratoconus.

Results:

All subjects were divided into four groups (Number of patients in Grade 1, 2, 3, 4. n:34, 32, 34, 33 eyes; respectively). CCT and minimum CCT were inversely proportional in all stages of keratoconus. There was no significant difference in curvature asymmetry index of front and back surface between groups (p:0.683, p:0.097; respectively). HVID and CV were significantly showed a decreasing trend with increased grading (p: 0.022, p: 0.005; respectively) while ACD and ACV were increased with increased grading (p:0.007, p:0.232; respectively) in keratoconus patients. The iridocorneal angle was narrowed with increased stages of keratoconus (p: 0.05).

Conclusions:

Keratoconus is primarily corneal disease but the other essentials of the anterior segment may be affected other than the cornea. If ocular comorbidity is present, these alterations should be considered in order not to misdiagnose. None of the authors declared any conflicts of financial interest.

Financial Disclosure:

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