title: Central corneal thickness in patients with normal-tension glaucoma.
abstract: OBJECTIVE
  To compare the central corneal thickness of eyes with proved normal-tension glaucoma with that of eyes without glaucoma.
  
  
  METHODS
  A prospective study.
  
  
  METHODS
  The study included 30 consecutive patients with normal-tension glaucoma (60 eyes, group I), and 30 age- and gender-matched non-glaucoma patients (60 eyes, group II). Central corneal thickness was measured using an ultrasonic pachymeter (Pach IV, Accutome). The mean central corneal thickness of normal-tension glaucoma patients and controls were compared using independent samples t-test.
  
  
  RESULTS
  The mean (+/- SD) central corneal thickness of normal-tension glaucoma and non-glaucoma patients was 517.4 +/- 19.2 microm and 549.0 +/- 39.4 microm, respectively. There was a significant difference in this parameter between the groups (P < 0.001). The mean intraocular pressure was higher in glaucomatous eyes (17.1 +/- 2.3 vs. 16.3 +/- 1.4 mm Hg, P = 0.028). The visual acuity in normal-tension glaucoma eyes was lower than that in controls, but the difference failed to reach statistical significance (P = 0.069).
  
  
  CONCLUSIONS
  The results indicate that corneas of patients with normal-tension glaucoma are thinner than those of non-glaucoma patients.
authors.affiliation: Department of Ophthalmology, Medical University, Plovdiv, Bulgaria.
authors.forename: Marieta I
authors.initials: MI
authors.lastname: Konareva-Kostianeva
authors.forename: Marin A
authors.initials: MA
authors.lastname: Atanassov
mesh_terms: D000328:Adult; D000368:Aged; D003315:Cornea / Q000473:pathology*; D005260:Female; D005901:Glaucoma / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D014792:Visual Acuity