Publications by authors named "Mehmed Ugur Isık"

Introduction: The aim of this study was to compare the efficacy of the treat-and-extend (TAE) regimen versus the pro re nata (PRN) regimen in patients with bevacizumab-resistant diabetic macular edema (DME) treated with aflibercept, with or without adjunctive laser therapy.

Methods: Ninety-one eyes from 91 patients who were switched to aflibercept after three consecutive intravitreal bevacizumab injections for the treatment of DME were included in this retrospective real-world study. The patients were categorized into three groups: TAE (n = 30), TAE + laser (n = 31), and PRN (n = 30).

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Purpose: To compare the outcomes of early or late switching from intravitreal (IV) anti-vascular endothelial growth factor (anti-VEGF) injection to IV Dexamethasone (DEX) implant injection in treatment-naïve patients with macular edema secondary to branch retinal vein occlusion.

Methods: This study included 68 eyes of 68 treatment-naïve BRVO patients who started anti-VEGF treatment. After the loading dose, the patients were divided into two groups: Early DEX group (n:34) (DEX implant treatment started after 3 loading doses) and Late DEX group (n:34) (DEX implant treatment started after 6 months).

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Purpose: To evaluate early changes in anterior segment parameters by Scheimpflug-Placido disc topography system and changes in retinal layers by optical coherence tomography in primary angle-closure suspects after laser peripheral iridotomy.

Methods: One eye of 26 patients with primary angle closure suspect and of 20 healthy subjects were included in this retrospective cross-sectional study. Anterior chamber depth/volume, iridocorneal angle and central corneal thickness were obtained by Scheimpflug-Placido disc topography system.

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To investigate the effect of intravitreal dexamethasone (IVD) implant injection, which was used in the treatment of DME, on CVI and to investigate whether CVI can be used as a prognostic marker in the treatment of anti-VEGF resistant DME. A retrospective observational and comparative study. Twenty-five eyes of 25 patients with refractory diabetic macular edema who underwent intravitreal dexamethasone (IVD) implant and 50 eyes of 50 healthy patients were included in the study.

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Objectives: The aim of this study was to evaluate the relationship between optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) parameters in a healthy population and to detect any changes that occur with age.

Methods: A total of 100 healthy participants were included in this prospective, observational, and comparative study. The participants were categorized in 4 groups according to age: Group 1: 21-30 years, Group 2: 31-40 years, Group 3: 41-50 years, Group 4: 51-60 years of age.

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Purpose: To evaluate the cross-sectional areas of the retinal pigment epithelium-Bruch membrane complex (RPE-B) and ellipsoid zon (EZ) and the thickness of the macula, retinal nerve fibre layer (RNFL), and ganglion cell-inner plexiform layer (GC-IPL) in patients using short-term systemic isotretinoin.

Method: A total of 43 right eyes of 43 patients treated with systemic isotretinoin for acne vulgaris were included in this prospective study. Macula, GC-IPL, RNFL thicknesses and central cross-sectional EZ and RPE-B areas were evaluated with optical coherence tomography (Zeiss, Cirrus HD OCT 5000) prior to treatment and in first, second and third months after the onset of isotretinoin treatment.

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The purpose of this study was to investigate the effect of the status of retinal pigment epithelium (RPE) and HbA1c levels on the efficacy of the subthreshold micropulse laser (SMPL) in the treatment of center-involving diabetic macular edema (DME). A total of 20 eyes of 20 patients (mean age 57.9 ± 9.

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Purpose: To detect the changes that can be determined with optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) in young and short-term smokers.

Method: In this cross-sectional, observational, and comparative study, 45 "healthy" smokers and 45 healthy non-smoker control participants were included. Those with a smoking history between 1 year to 5 years and an average of 10-30 cigarettes per day were included in the study.

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: To evaluate the relationship between diabetic retinopathy and oxidative damage by measuring intracellular and extracellular thiol levels, and to compare intracellular and extracellular thiol levels. : In this prospective, cross-sectional, and comparative study, 25 healthy control participants (group 1), a total of 25 diabetic macular edema (DME) patients with non-proliferative diabetic retinopathy (DRP) and without DME (group 2), and 25 DME patients with non-proliferative DRP and with DME (group 3) were included. Choroidal thickness (ChT) and central macular thickness (CMT) were measured by spectral domain optic coherence tomography.

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Article Synopsis
  • The study aims to compare the effectiveness of three anti-VEGF treatments—bevacizumab, ranibizumab, and aflibercept—on patients with pseudophakic cystoid macular edema (CME) due to Irvine-Gass syndrome (IGS).
  • A retrospective case series was conducted on 59 patients, analyzing various eye measurements at baseline and over six months to assess treatment outcomes.
  • While all treatments showed efficacy, bevacizumab exhibited a faster resolution time for CME and was suggested to be more cost-effective compared to the other two agents.
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Significance: Measuring pupil diameter may provide an additional objective method to detect and monitor glaucoma.

Purpose: The purposes of this study were to evaluate whether pupillometry can be used in the assessment of glaucomatous damage and to determine whether pupillometer can be used in glaucoma screening.

Methods: In this retrospective study, patients with early stages of glaucomatous optic neuropathy were tested using visual evoked potential (VEP), standard automated perimetry, and pupillometer.

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Aim: To evaluate the efficacy and safety of subthreshold micropulse yellow laser (SMYL) in the treatment of chronic central serous chorioretinopathy (CCSC).

Methods: The medical records of 58 eyes of 58 patients with CCSC were reviewed. A 577-nm SMYL system was used for the treatment.

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Purpose: To evaluate the choroidal and retinal layers with optical coherence tomography (OCT) and retinal microvascular structures with optical coherence tomography angiography (OCTA) in systemic lupus erythematosus (SLE) patients.

Method: In this prospective, cross-sectional and comparative study, a total of 35 SLE patients and 35 healthy control participants were included. SLE patients who were using hydroxychloroquine (HCQ) and/or immunosuppressive agents are evaluated with OCT and OCTA.

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An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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Purpose: To compare the efficacy of nepafenac on anterior chamber flare and intraocular pressure(IOP) in healthy (group 1) and uveitic eyes (group 2) undergoing cataract surgery.

Methods: A retrospective, consecutive case series study.

Results: Among 54 the patients, 14 had a history of uveitis.

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Objectives: To evaluate the long-term treatment outcomes in intraocular retinoblastoma (RB) including the associated factors for eventual treatment with external beam radiotherapy (EBRT) and enucleation as well as to analyse the risk factors for metastasis and death in extraocular RB.

Methods: Retrospective analysis of 390 eyes from 256 (89.8%) intraocular RB and 29 (10.

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Background: The aim of study was to evaluate the retinal layers and macular capillary network with OCTA in acromegaly patients, to compare with healthy population.

Methods: In this prospective, observational, and comparative study, 40 acromegaly patients and 40 healthy control participants were included. Serum IGF-1 levels and disease duration of all patients were noted.

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A 6-year-old female was admitted to the ophthalmology department with a preliminary diagnosis of keratoconus. An accelerated cross-linking (CXL) protocol (9 mW/cm in 10 minutes) was performed on the right eye. On postoperative day 2, a slit-lamp examination revealed 2 corneal infiltrates with grade 3 haze.

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Objectives: To evaluate the ABCD grading system used in follow-up of keratoconus progression after the corneal collagen cross-linking (CXL) treatment in different Kmax groups.

Methods: This study included 57 eyes of 43 patients applied with CXL treatment for progressive keratoconus. All the patients were applied with the standard CXL protocol (Dresden).

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Aim: To evaluate the risk factors leading to recurrence in patients with ocular surface squamous neoplasia (OSSN).

Methods: The records of 112 patients with OSSN who underwent treatment and follow-up between February 1999 and August 2018 were reviewed retrospectively.

Results: Totally 67 patients (59.

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: This study aims to compare the spectral domain optical coherence tomography (SD OCT) findings and laser flare photometry (LFP) measurements in Behçet's disease (BD).: This study was composed of 4 groups as follows: "Group 1: Healthy volunteers, Group 2: Volunteers with BD and no eye involvement, Group 3: Patients with active uveitis with BD, Group 4: Patients with BD in quiescent phase of uveitis". Laser Flare Photometry (Kowa FM-600, Kowa Acculas, San Jose, CA, USA), SD-OCT and Enhanced Depth Imaging protocol (EDI) (Spectralis®, Heidelberg Engineering Inc.

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