Publications by authors named "İbrahim F Hepsen"
Precis: Ab interno (gonioscopy-assisted transluminal trabeculotomy) and ab externo 360-degree suture trabeculotomy (ST) achieved similar success rates for reducing intraocular pressure (IOP) without serious complications threatening visual acuity.
Purpose: We aimed to compare the efficacy of ab externo and ab interno 360-degree ST in reducing IOP, decreasing the number of antiglaucoma medications required, and decreasing the rates of intraoperative/postoperative complications in adults with open-angle glaucoma (OAG).
Patients And Methods: This retrospective study included 33 eyes of 33 patients who underwent ab externo 360-degree ST (group 1) and 23 eyes of 23 patients who underwent ab interno 360-degree ST for OAG (group 2).
Purpose: The purpose of the present study was to evaluate the aqueous humor endocan and endostatin levels in patients with pseudoexfoliation (PEX) syndrome and to compare the results with healthy individuals.
Materials And Methods: Twenty nine cataract patients with PEX syndrome (PEX group) and 32 cataract patients without PEX syndrome (control group) were enrolled in the study. Endocan and endostatin were measured in the aqueous humor of the PEX and control groups by enzyme-linked immunosorbent assay.
Objectives: To assess the repeatability and reproducibility of anterior segment measurements including aberrometric measurements provided by a dual Scheimpflug analyzer (Galilei) system in normal eyes.
Materials And Methods: Three repeated consecutive measurements were taken by two independent examiners. The following were evaluated: total corneal power and posterior corneal power, corneal higher-order wavefront aberrations (6.
Aim: To analyze the relationship between two visual functions and refractive, topographic, pachymetric and aberrometric indicators in eyes with keratoconus.
Methods: Corrected distance visual acuity (CDVA), and letter contrast sensitivity (CS) were correlated with refraction, corneal topography, pachymetry, and total corneal wavefront data prospectively in 71 eyes with keratoconus. The topographic indices assessed were simulated keratometry for the flattest and steepest meridians (SimK1 and SimK2), posterior steeper K (Ks), elevation value in best-fit sphere (BFS) maps, squared eccentricity (Є(2)), aspheric asymmetric index (AAI), pachymetry, thickness progression index (TPI), the amount of pachymetric decentralization (APD), and GalileiTM-keratoconus indices.
Article Synopsis
- - The study aimed to assess how consistent and comparable a new optical biometer (AL-Scan) is with another established device (Lenstar) in measuring various eye parameters in cataract patients.
- - Researchers performed three measurements on 65 patients, categorized by their axial length, and used statistical methods to evaluate repeatability and agreement between the two devices.
- - Results indicated both devices showed high repeatability (ICC > 0.970) and good agreement, especially for axial length measurements, suggesting that the new biometer is reliable for ocular biometry in patients with cataracts.
Unilateral Spontaneous Descemet Membrane Rupture in a Case With Megalophthalmos.
Eye Contact Lens
January 2018
Objective: To report a case of unilateral spontaneous descemet membrane rupture associated with megalophthalmos.
Methods: A case report of a 23-year-old woman with blurred vision of the right eye for 6 months due to spontaneous descemet membrane rupture associated with megalophthalmos is described. Slit-lamp examination demonstrated corneal edema and suggestion of a descemet membrane rupture in the right eye.
Purpose: We aimed to evaluate the 12-month results of a modified 360-degree suture trabeculotomy (ST) technique in patients with pseudoexfoliation glaucoma (XFG).
Patients And Methods: The modified 360-degree ST was performed on 20 eyes of 20 consecutive patients with XFG resistant to maximal topical treatment. In 8 patients, ST was combined with phacoemulsification.
We report a case of primary acquired corneal melanosis without atypia associated with corneal haze in a patient with a history of limbal malignant melanoma and the effect of mitomycin-C. A 75-year-old woman with a history of limbal malignant melanoma presented with loss of vision in right eye. Corneal examination showed a patchy melanotic pigmentation with a central haze.
View Article and Find Full Text PDFArticle Synopsis
- The study evaluated the consistency and agreement in anterior segment measurements using two different devices: the Galilei dual Scheimpflug analyzer and the Nidek AL Scan on both keratoconic and normal eyes.
- Measurements included central corneal thickness, anterior chamber depth, keratometry readings, and white-to-white distance, with excellent repeatability found for both devices in all parameters for normal eyes.
- While both devices are interchangeable for most measurements in normal eyes, significant differences were noted in keratoconic eyes regarding central corneal thickness and keratometry measurements, indicating they should not be used interchangeably for these specific parameters.
Purpose: In this prospective study, we aimed to investigate the success and safety of a modified 360-degree suture trabeculotomy (ST) technique in patients with pseudoexfoliation glaucoma (XFG).
Patients And Methods: The modified 360-degree ST was performed on 15 eyes of 15 patients with XFG resistant to maximal topical treatment. In 6 patients, ST was combined with phacoemulsification.
Repeatability and reproducibility of a new optical biometer in normal and keratoconic eyes.
J Cataract Refract Surg
January 2015
Purpose: To evaluate the repeatability and reproducibility of measurements obtained by a new optical biometer (Nidek AL-Scan) in normal eyes and keratoconic eyes.
Setting: Department of Ophthalmology, Turgut Özal University, Medical School, Ankara, Turkey.
Design: Evaluation of diagnostic technology.
Objective: To quantify the difference between anterior chamber parameters determined by the Galilei dual Scheimpflug analyzer after uneventful cataract surgery in normotensive eyes.
Methods: In this study, 39 eyes of 30 patients (11 men and 19 women) who had uneventful cataract surgery with phacoemulsification were evaluated preoperatively, and at 1 month postoperatively with the Galilei. We investigated the measurements including anterior chamber depth (ACD), anterior chamber angle (ACA), anterior chamber volume (ACV), central corneal thickness (CCT), and the 3-, 5-, and 7-mm corneal thickness (CT) preoperatively and postoperatively.
Objective: To assess the repeatability and reproducibility of the anterior segment measurements performed with a dual Scheimpflug analyzer (Galilei) in normal, keratoconic and post-refractive surgery corneas.
Methods: To evaluate the repeatability, two additional measurements were performed by the first examiner. To assess reproducibility, this was later followed by a single reading by the second examiner.
Uveitis, glaucoma, and cystoid macular edema frequently develop in patients with juvenile idiopathic arthritis. The authors describe a case of cystoid macular edema associated with juvenile idiopathic arthritis that had not responded to intravitreal triamcinolone acetonide and bevacizumab but improved significantly following intravitreal injection with a dexamethasone 0.7 mg implant.
View Article and Find Full Text PDFPurpose: To determine if aspheric intraocular lens (IOL) implantation produces the same degree of postoperative ocular aberration and contrast sensitivity as spherical IOL implantation.
Methods: In this randomized prospective comparative study, 60 eyes of 30 cataract surgery patients were randomly assigned to receive a spherical IOL (Rayner 620H) in one eye and an aspheric IOL (Rayner 920H) in the contralateral eye. All patients were examined at 1 month postoperatively.
Aim: To investigate the effects of body mass index (BMI) on intraocular pressure (IOP) and ocular pulse amplitude (OPA).
Methods: Totally 140 healthy individuals without any systemic diseases were included in the study. BMI (kg/m(2)) was calculated for every individual.
Purpose: The aim of this study was to establish the antioxidant status and oxidative stress in patients with primary open-angle glaucoma (POAG) and pseudoexfoliative glaucoma (PEG).
Methods: Serum levels of total antioxidant capacity (TAC) and superoxide dismutase (SOD) as indicators of antioxidant status; and total oxidant status (TOS), nitric oxide (NO), protein carbonyl (PC), and malondialdehyde (MDA) as indicators of oxidative stress were measured from the blood samples of patients with POAG (n = 23), PEG (n = 24) and healthy control subjects (n = 19) by spectrophotometry.
Results: Mean TAC level was 0.
Aim: Our purpose was to investigate the possible roles of nitrite levels and the activity of paraoxonase (PON), xanthine oxidase (XO) and adenosine deaminase (ADA) in the pathogenesis of pseudoexfoliation (PEX) syndrome.
Methods: Serum samples were taken from 43 patients with PEX and 41 control subjects. The serum PON, XO and ADA activities and nitrite levels were assayed by spectrophotometric methods.
Purpose: To report a case of amiodarone-induced keratopathy involving the entire cornea, including the endothelium.
Methods: Clinical case description and documentation with confocal laser scanning microscopy using the Heidelberg Retinal Tomography II (HRT II).
Results: A 65 year-old man with a history of blurred vision and seeing halos around lights had been treated with amiodarone for 6 years.
Purpose: To evaluate whether cyclosporin A prevents or reduce posterior capsule opacification after phacoemulsification surgery in rabbit eyes.
Methods: Twenty rabbits underwent cataract surgery in their right eyes were randomized into two groups. In group 1, 0.
Background: Previous studies have reported different central corneal thickness (CCT) values in eyes with pseudoexfoliation syndrome (PXS). There has been no report about corneal curvature (CC) in PXS eyes. The aim of this study was to investigate the CCT together with the CC in PXS eyes with and without glaucoma.
View Article and Find Full Text PDFPurpose: Thymoquinone, one of the biologically active components of black seed oil, has anti-inflammatory and antioxidant properties. We aimed to study the effect of thymoquinone on corneal neovascularization in rats and to compare its efficacy with that of triamcinolone acetonide.
Methods: Chemical cauterization of the cornea was performed with silver nitrate/potassium nitrate sticks in 40 eyes in 40 rats.
Purpose: To assess central corneal thickness (CCT) values in individuals with intellectual disabilities (ID).
Methods: The study group was made up of 25 participants with ID (mean age, 36.9 +/- 8.