الفهرس 
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Abstract
Central corneal thickness (CCT), corneal curvature and anterior chamber depth are important indicators of corneal status. Their measurement provides valid information about corneal physiological condition and possible changes associated with diseases, traumas, and hypoxia. CCT determination has become very important for interpretation of intraocular pressure measurements, glaucoma patient management and pre-refractive procedure assessment for choosing the best treatment option and avoiding complications such as corneal ectasia
The Pentacam (Oculus Optikgeräte GmbH, Wetzlar, Germany) offers evaluation of the entire anterior segment from the anterior corneal surface to the posterior lens surface using a rotating Scheimpflug camera. The noncontact measuring process takes only 2 seconds and performs 12 to 50 single captures. In total, up to 25 000 height values are detected and processed to a 3-dimensional model of the anterior eye segment.
The aim of this study is to determine the mean CCT, anterior chamber depth and corneal curvature and to correlate between CCT, anterior chamber depth, corneal curvature and refraction using Pentacam in patients attending outpatient clinic of the Department of Ophthalmology, Minia University Hospital.
The study is an observational cross-sectional study on 500 patients attending the outpatient clinic of the Department of Ophthalmology, Minia University Hospital in the period between May 2018 and April 2019.Only the right eye was included for each patient.
All patients underwent detailed ophthalmologic assessment as well as Pentacam scanning. Parameters retained for the analysis were central corneal
thickness (CCT), keratometry readings (K1, K2, and Kmax) of the anterior corneal surface and anterior chamber depth (ACD).
Data were collected, revised, verified, coded and then entered PC for statistical analysis done by IBM SPSS statistics for Windows, version 21.
The mean age of the patients was 34.82 ± 13.63 years (range: 7 to 73 years). The mean CCT was 521.22 ± 34.33 µm (range: 406 to 616 µm), the mean of K1 was 43.45± 1.67 D (range: 36 to 48.4 D) and the mean of K2 was 44.68± 1.78 D (range: 37.5 to 50.4 D) while the mean of Kmax was 46.00±2.13 D (range: 40.1 to 55.3 D). The mean ACD was 2.92 ±.344 mm (range: 2.09 to 3.85 mm).
There was high statistical significant differences between both genders in UCVA (LogMAR) (p-value = 0.003), BCVA (LogMAR), (p-value= 0.006), K1 (p-value = <0.001), K2 (p value = <0.001), K max (p- value = <0.001) and ACD (p- value = 0.005).
There was weak negative correlation between CCT and age, K1, K2 and
K max .