Publications by authors named "Utku Limon"

Article Synopsis
  • The study investigates optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) in fibromyalgia (FM) patients to assess changes in the macula and optic disk.
  • A total of 84 individuals were included, with 44 diagnosed with FM and 40 healthy controls, using various OCT/OCTA parameters and questionnaires to compare findings and correlations.
  • Results show significant retinal changes in FM patients, including lower macular thickness and retinal nerve fiber layer measurements, while some vessel density metrics were higher, indicating OCT/OCTA's potential in objectively assessing neuroretinal changes related to FM.
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Purpose: The aim of this study is to investigate the effect of vitreomacular interface disorders (VMID) on treatment response in patients treated with anti-vascular endothelial growth factor (anti-VEGF) due to diabetic macular edema (DME).

Methods: Three hundred seventy-seven eyes of 239 patients in the MARMASIA Study Group who received intravitreal anti-VEGF treatment (IVT) due to DME were included in the study. The group 1 consisted of 44 eyes of the patients who had not received any treatment before, were followed up regularly for 24 months after at least a 3-month loading dose, and suffered from VMID such as epiretinal membrane, vitreomacular adhesion or traction, and lamellar hole.

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Purpose: This study aimed to compare the effect of intravitreal aflibercept (IVA) and ranibizumab (IVR) on the maximal diameter of the largest intraretinal cyst (mdIRC), indicating chronicity in patients with diabetic cystoid macular edema (CME).

Methods: This retrospective, comparative study included a subgroup of patients from the MARMASIA Study with treatment-naïve diabetic CME who had IVA (IVA group) or IVR (IVR group) on a pro re nata regimen after a loading dose of 3-monthly injections and followed-up for 24 months. Best-corrected visual acuity (logMAR), central macular thickness (CMT, µm), and mdIRC (µm) and their changes during the study period in the IVA and IVR groups were compared.

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Purpose: To evaluate the retinal microvascular differences after successful macular hole surgery by using the superior and temporal inverted flap technique.

Methods: In this retrospective study, patients with idiopathic macular holes with a horizontal diameter of 250-400 μm at the narrowest point, and who have a follow-up of 6 months were included in the study. Group 1 included 14 patients' 14 eyes that have been treated using the superior inverted flap technique.

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Objectives: This study aimed to report the demographic and clinical characteristics of diabetic macular edema (DME) patients treated with intravitreal injection (IVI) of anti-vascular endothelial growth factors (anti-VEGF) and provide an overview of outcomes during routine clinical practice in Türkiye.

Materials And Methods: This retrospective, real-world study included 1,372 eyes (854 patients) treated with a pro re nata protocol by 21 ophthalmologists from 8 tertiary clinics on the Asian side of the Marmara region of Türkiye (MARMASIA Study Group). Five cohort groups were established by collecting the patients' baseline and 3, 6, 12, 24, and 36-month follow-up data, where each subsequent cohort may include the previous.

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Objectives: The aim of the study was to evaluate the patients who received simultaneous subretinal tissue plasminogen activator (tPA) and bevacizumab for submacular hemorrhages secondary to neovascular age-related macular degeneration.

Methods: This retrospective study included patients who underwent pars plana vitrectomy (PPV) with simultaneous subretinal tPA and subretinal bevacizumab with 18% SF6 tamponade. Anatomical and functional results of the patients before surgery and at the 1, 6, and 12 months after surgery, additional treatments, and complications after PPV were evaluated.

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A capsulorhexis technique with a 23-gauge vitreous cutter in intumescent cataract surgery is presented. These patients have a high risk of uncontrollable extension of the opening of the anterior lens capsule. We used vitreous cutter for capsulorhexis along with the other steps performed as in standard phacoemulsification surgery.

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We described a modified Yamane technique for simplifying trailing haptic insertion in aphakia correction. In Yamane intrascleral intraocular lens (IOL) implantation technique, trailing haptic implantation is challenging for many surgeons. This modification provides an easier and safer way of trailing haptic insertion into the needle tip and decreases the possibility of bending or breaking the trailing haptic.

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Purpose: To evaluate the effects of fluorescein dye on corneal endothelial morphology (CEM) after fundus fluorescein angiography (FFA) in patients with diabetic macular edema (DME).

Methods: In this retrospective study, patients were divided into two groups, nonproliferative diabetic retinopathy (Group-1, NPDR) and proliferative diabetic retinopathy (Group-2, PDR). CEM properties including endothelial cell density (ECD), coefficient of variation of cell area (CV), average cell area (AVG), percentage of hexagonal cells (HEX), and central corneal thickness (CCT) were measured before FFA and at week 1 and month 1 after FFA were collected from patients' charts.

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A 16-year-old type 1 diabetic female patient was consulted to our clinic for acute bilateral painless vision loss with a 2-week history in the right eye and a 1-week history in the left eye. At the initial visit, the best-corrected visual acuity was 0.2 in the right eye and 0.

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Axenfeld-Rieger syndrome (ARS) is a genetic disease affecting multiple organ systems. In the eye, it is associated with anterior segment dysgenesis with a high risk for glaucoma. Dental anomalies, cardiovascular malformations, hypospadias, and craniofacial abnormalities are other associated systemic conditions.

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Purpose: To evaluate the serum fibrinogen/albumin ratios in patients with acute and chronic central serous chorioretinopathy, and healthy control samples.

Methods: Serum fibrinogen/albumin ratios were assessed in patients with acute (Group-1, 30 eyes) and chronic (Group-2, 30 eyes) central serous chorioretinopathy, and compared with healthy control (Group-3, 30 eyes) samples.

Results: Fibrinogen/albumin ratios were significantly higher in Group-1 (104.

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Objectives: To evaluate and compare the effects of hybrid contact lenses (HCLs) and mini-scleral contact lenses (MSCLs) on visual acuity, spherical equivalent, topographic astigmatism, and higher-order aberrations (HOAs) in eyes with advanced keratoconus.

Methods: We reviewed the medical records of 43 eyes of 27 patients diagnosed with advanced keratoconus fit hybrid contact lenses (AirFlex®) and mini-scleral contact lenses (Mini-misa®). Pre-fitting examinations included best corrected visual acuity (BCVA), spherical equivalent, topographic findings (topographic astigmatism, maximum keratometry, mean keratometry, central corneal thickness, thinnest corneal thickness, and corneal HOAs.

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To report the effect of simultaneous dexamethasone and bevacizumab combination treatment in patients with macular edema secondary to branch retinal vein occlusion (BRVO). Treatment-naive patients who had a macular edema secondary to BRVO with a duration of less than 1 month were treated either with intravitreal bevacizumab (Group-1) or intravitreal bevacizumab simultaneously combined with dexamethasone intravitreal implant (Group-2). In both groups, patients received monthly bevacizumab injection during the first 3 months.

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To evaluate the efficacy and complications of intravitreal dexamethasone with simultaneous silicone tamponade after combined phacoemulsification and pars plana vitrectomy (PPV) in severe diabetic tractional retinal detachments (TRDs). In this single center, prospective, randomized, and open labeled 2 parallel group study, patients who applied to our clinic due to diabetic TRD involving the macula with grade-3 and 4 cataracts were randomized to receive either simultaneous silicone tamponade and intravitreal dexamethasone (Group-1) or only silicone tamponade (Group-2). Primary outcome measurements were the incidence rate of retinal re-detachment and, proliferative vitreoretinopathy (PVR) at sixth month, and anterior segment inflammation and posterior iris synechia at first and at sixth months.

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A 24-year-old pregnant woman applied with 2 days of sudden vision loss. Funduscopy showed serous retinal detachment along in the right eye and tear was not found. In the left eye, there were two small subretinal fluid accumulationsThe patient was diagnosed with serous retinal detachment due to preeclampsia.

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Purpose: To evaluate the add-on effect of simultaneous intravitreal dexamethasone implant to bevacizumab for treatment of neovascular serous retinal pigment epithelial detachment (PED) secondary to neovascular age-related macular degeneration (nAMD).

Methods: A 72-year-old male patient was previously treated with intravitreal bevacizumab and aflibercept for neovascular serous PED secondary to nAMD. Because of the recurrences in neovascular PED patient was treated with simultaneous intravitreal injection of bevacizumab and dexamethasone implant.

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Article Synopsis
  • The study aimed to identify the best diagnostic method for assessing cognitive decline and brain atrophy in parenchymal Neuro-Behçet's disease (NBD) using various evaluations, including MRI and neuropsychological tests.
  • In a matched case-control study with 68 participants, results showed that those with NBD had significantly lower cognitive scores and abnormal retinal measurements compared to controls, alongside notable brain volume loss in critical regions.
  • The findings suggest that while standard clinical evaluations and optical coherence tomography (OCT) are not effective in predicting brain atrophy, the P100 amplitude from pattern-reversal visual evoked potentials (prVEP) may serve as a useful indicator of cerebral white matter involvement in NBD.
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A 45-year-old female patient consulted our hospital for bilateral visual loss. She was receiving hemodialysis for 15 years. At presentation ophthalmologic examination, her visual acuity was hand movements in the right eye and light perception negative in the left eye.

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