title: Corneal topography analysis of stromal corneal dystrophies.
abstract: OBJECTIVE
  The aim was to compare the corneal topography and tomography parameters of macular corneal dystrophy (MCD), granular corneal dystrophy (GCD) and lattice corneal dystrophy (LCD) patients obtained by Scheimpflug imaging system.
  
  
  METHODS
  The charts, photographs and topography images of patients were reviewed retrospectively. This study included 73 eyes of 73 patients (28 MCD, 20 GCG and 25 LCD patients). Topography images were obtained by Pentacam (Oculus Optikgerate, Wetzlar, Germany). The densitometry readings at the corneal apex were used for the statistics.
  
  
  RESULTS
  The female to male ratio was 13/15 in MCD group, 12/8 in GCD group and 13/12 in LCD group. The mean age median age was 32, 45 and 53 years in MCD, GCD and LCD groups respectively. The groups were similar regarding the gender (p=0.861). The MCD group was significantly younger than the other two groups (p<0.001). The median (minmum-maximum) corneal densities were 100 (100-100), 68 (17-100) and 97 (34-100) Pentacam densitometry units in MCD, GCD and LCD groups respectively. The corneal density at the corneal apex was significantly higher in MCD group than in the other groups (p<0.001). The GCD and LCD groups were statistically similar in terms of density of the corneal apex (p=0.079). In MCD group, corneal thickness at the apex and at the thinnest location was significantly thinner, than in the other groups (p=.002 for thickness at apex between MCD and LCD, and p<.001 for all the remaining comparisons). In MCD group corneal volume was significantly smaller than in the other groups (p<.001 for all comparisons).
  
  
  CONCLUSIONS
  Densitometry on Scheimpflug imaging system gives information on the density of corneal opacities.
authors: Yusuf Kocluk, MD, Ophthalmolgy Clinic, Ministry of Health, Adana Numune Training and Research Hospital, TR01076, Adana, Turkey.
authors: Yusuf
authors: Y
authors: Kocluk
authors: Zuleyha Yalniz-Akkaya, MD, Ophthalmolgy Clinic, Ministry of Health, Ankara Training and Research Hospital, TR06340 Ankara, Turkey.
authors: Zuleyha
authors: Z
authors: Yalniz-Akkaya
authors: Ayse Burcu, Associate Professor, Ophthalmolgy Clinic, Ministry of Health, Ankara Training and Research Hospital, TR06340 Ankara, Turkey.
authors: Ayse
authors: A
authors: Burcu
authors: Firdevs Ornek, MD, Ophthalmolgy Clinic, Ministry of Health, Ankara Training and Research Hospital, TR06340 Ankara, Turkey.
authors: Firdevs
authors: F
authors: Ornek
keywords: Granular corneal dystrophy; Lattice corneal dystrophy; Macular corneal dystrophy; Pentacam corneal densitometry unit; Scheimpflug imaging