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Hisham Samy Shalaby,1 Marwa Ebrahim ElSebaay,1 Mohamed Mahmoud Samy2 1Department of Ophthalmology, Faculty of Medicine, Ain Shams University, Cairo, Egypt; 2Department of Obstetrics and Gynecology, Faculty of Medicine, Ain Shams University, Cairo, EgyptCorrespondence: Hisham Samy ShalabyDepartment of Ophthalmology, Faculty of Medicine, Ain Shams University, Abbassia Square, Cairo 11591, EgyptTel +00201003641789Email hisham_ophth@yahoo.comObjective: To compare choroidal thickness in pregnant women with and without diabetes mellitus (DM).Methods: Sixty pregnant females (60 eyes) were enrolled in this cross-sectional controlled study. They were divided into two groups: Group A (30 patients; 30 eyes) were pregestational diabetic pregnant females, while Group B (30 patients; 30 eyes) were non-diabetic pregnant females. Exclusion criteria were high-risk pregnancy, diabetic retinopathy in Group A subjects, systemic or ophthalmological pathology, drug intake other than vitamin supplements and diabetic medications, and large errors of refraction. All patients underwent full ophthalmological examination and enhanced depth imaging optical coherence tomography (EDI-OCT) to measure the choroidal thickness in the nine zones of the Early Treatment Diabetic Retinopathy Study (ETDRS) map.Results: Our results show that Group A eyes (of pregnant diabetic females) had a highly significant greater choroidal thickness than Group B eyes (of pregnant non-diabetic females) in all nine zones of the ETDRS map (p-value < 0.01). Moreover, we found a positive linear correlation between the duration of DM and the degree of choroidal thickening.Conclusion: Pregnant diabetic females have a thicker choroid than that of pregnant non-diabetic females.Keywords: choroidal thickness, diabetes, optical coherence tomography, pregnancy

Hesham Mohamed Gharieb,1,2 Hisham Samy Shalaby,3 Ihab Saad Othman4,5 1Faculty of Medicine, Ain Shams University, Cairo, Egypt; 2Research and Development, Eye World Hospital, Giza, Egypt; 3Department of Ophthalmology, Faculty of Medicine, Ain Shams University, Cairo, Egypt; 4Eye World Hospital, Giza, Egypt; 5Faculty of Medicine, Cairo University, Giza, EgyptCorrespondence: Hisham Samy ShalabyDepartment of Ophthalmology, Faculty of Medicine, Ain Shams University, Abbassia Square, Cairo 11591, EgyptTel +20 1003641789Email hisham_ophth@yahoo.comPurpose: This study aims to assess the intra-operator repeatability and correlation of the Pentacam HR (device 1) and Sirius (device 2) in measuring anterior segment parameters and to evaluate the agreement of their readings and therefore their interchangeability in a clinical setting.Methods: This is a prospective non-randomized study was conducted on the right eyes of 102 subjects coming to Eye World Hospital, Giza, Egypt. With each machine, four scans were taken by a single examiner. Each device was used to measure keratometric indices, corneal thickness, anterior chamber depth, anterior chamber angle, corneal diameter and corneal optical aberrations.Results: Both devices show high repeatability for corneal thickness, corneal diameter, anterior chamber depth and keratometric indices (except for maximum keratometry, where device 1 shows high repeatability and device 2 shows low repeatability). On the other hand, both devices show poor repeatability for anterior chamber angle, Q-values, root mean square, spherical, coma and trefoil aberrations. The readings of the two devices are strongly correlated as regards only keratometric indices, corneal thickness and anterior chamber depth. In addition, the readings of the devices are in good agreement as regards only keratometric indices (except maximum keratometry), corneal thickness, anterior chamber depth, anterior chamber angle, root mean square, spherical and trefoil aberrations.Co