Gökhan Çelik

ORCID: 0000-0003-2111-0420
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About
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Research Areas
  • Retinopathy of Prematurity Studies
  • Neonatal Respiratory Health Research
  • Retinal Diseases and Treatments
  • Glaucoma and retinal disorders
  • Corneal surgery and disorders
  • Intraocular Surgery and Lenses
  • Neonatal and fetal brain pathology
  • Neonatal Health and Biochemistry
  • Ocular Surface and Contact Lens
  • Retinal and Macular Surgery
  • Ophthalmology and Eye Disorders
  • Infant Development and Preterm Care
  • Pregnancy and preeclampsia studies
  • Cerebral Venous Sinus Thrombosis
  • Retinal and Optic Conditions
  • Thyroid Disorders and Treatments
  • Ocular Diseases and Behçet’s Syndrome
  • Corneal Surgery and Treatments
  • Preterm Birth and Chorioamnionitis
  • Nasolacrimal Duct Obstruction Treatments
  • Ocular Oncology and Treatments
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Ocular Disorders and Treatments
  • Biomedical Research and Pathophysiology
  • Optical Coherence Tomography Applications

Tarsus University
2024-2025

Zeynep Kamil Hospital
2014-2024

Sağlık Bilimleri Üniversitesi
2019-2024

Nidek (Japan)
2024

İstanbul Eğitim ve Araştırma Hastanesi
2024

Haydarpaşa Numune Eğitim ve Araştırma Hastanesi
2023

Universidad CES
2022

Ministry of Health
2021

Istanbul Medipol University
2021

Purpose: To evaluate the efficacies and treatment outcomes following intravitreal bevacizumab (IVB), ranibizumab (IVR), laser photocoagulation (LPC) in retinopathy of prematurity (ROP).Methods: This was a retrospective interventional case series study including data 134 infants (264 eyes) who were treated with IVB, IVR, or LPC for ROP. The collected from two major ROP centers Turkey without any randomization masking. Regression ROP, recurrence profile, complications after each modality,...

10.1080/02713683.2016.1196709 article EN Current Eye Research 2016-07-15

Purpose: To evaluate 2-year outcomes following intravitreal bevacizumab (IVB) as monotherapy for aggressive posterior retinopathy of prematurity (APROP). Methods: Medical records 40 infants were retrospectively reviewed. Group I included who had received IVB injections APROP. II underwent laser treatment Anatomic and refractive the presence anisometropia strabismus assessed at follow-up examinations. Results: 48 eyes 25 (11 males) with a mean gestational age (GA) 26.40 ± 1.82 weeks birth...

10.5935/0004-2749.20150079 article EN Arquivos Brasileiros de Oftalmologia 2015-01-01

Purpose: To compare tear film osmolarity (TFO) and other dry eye tests between diabetic children normal healthy children.Materials Methods: Twenty-six (Group 1) 20 without any ocular and/or systemic disorder 2) were enrolled in the study. Detailed surface assessment including, disease index (OSDI) questionnaire, TFO measurement (Tear Lab Osmolarity System, San Diago, CA, USA), corneal epithelial thickness (CET) using anterior segment optical coherence tomography (OCT) (RTVue CAM, Optovue...

10.3109/02713683.2015.1136421 article EN Current Eye Research 2016-05-09

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10.2139/ssrn.5073845 preprint EN 2025-01-01

We have investigated the risk factors that lead to severe retinopathy of prematurity using statistical analysis and logistic regression as a form generalized additive model (GAM) with pairwise interaction terms (GA2M). In this process, we discuss trade-off between accuracy interpretability these machine learning techniques on clinical data. also confirm intuition expert neonatologists few factors, such gender, were previously deemed clinically not significant in RoP prediction.

10.1109/deep-ml.2019.00020 article EN 2019-08-01

Context: The presence of dry eye syndrome (DES) in ocular allergic diseases was evaluated several studies. Despite this, little exists about the tear film instability atopic children including patients with rhinitis (AR), conjunctivitis (AC) and asthma. This is a study which presents intriguing findings regarding relationship clinical aspects children.Objective: To determine AR, AC asthma.Materials methods: One hundred thirty-five consecutive asthma as group 45 without any systemic...

10.3109/15569527.2015.1010727 article EN Cutaneous and Ocular Toxicology 2015-02-19

Purpose: To assess ocular biometric outcomes following intravitreal bevacizumab (IVB) monotherapy for retinopathy of prematurity (ROP) and compare these results with those laser photocoagulated infants the ones spontaneously regressed ROP.Materials methods: Premature including who underwent IVB (Group 1) or photocoagulation 2) ROP 3) were recruited study. Refractive errors parameters (Axial length [AL], anterior chamber depth [ACD], lens thickness [LT]) measured at adjusted 1 year age in all...

10.3109/09273972.2016.1159232 article EN Strabismus 2016-04-02

To demonstrate the clinical characteristics and treatment outcomes of severe retinopathy prematurity (ROP) in preterm infants with birth weight (BW) above 1500 g Turkey.A retrospective review 5920 ROP records was performed Zeynep Kamil Maternity Children's Diseases Training Research Hospital. The were obtained from center same institute between 2011 2016. data comprised demographic including, gestational age, BW, systemic risk factors, zone stage ROP, type, modality, inborn/outborn status...

10.1371/journal.pone.0161692 article EN cc-by PLoS ONE 2016-08-22

Two patients with no symptoms of hypertension in their medical history before pregnancy were referred to the obstetrics emergency clinic and visual complaints. After physical examination laboratory tests, one was diagnosed severe preeclampsia while other HELLP syndrome (Hemolysis-Elevated Liver enzymes-Low Platelets). Ocular examinations performed after delivery due patients' worsening The preeclamptic patient showed bilateral serous retinal detachment (SRD) macular hemorrhage. Systemic...

10.4274/tjo.45722 article EN cc-by-nc-nd Turkish Journal of Ophthalmology 2015-12-01

To report the effectiveness and safety of primary 23-Gauge (G) vitreoretinal surgery for rhegmatogenous retinal detachment (RRD).In this retrospective study, 49 eyes consecutive patients who underwent 23-G transconjunctival sutureless vitrectomy (TSV) RRD between January 2007 July 2009 at our institution were evaluated.Mean follow-up time was 8.9±7.7 months (1-28 months). Retinal reattachment achieved with a single operation in 47(95.9%) eyes. In two (4.1%), redetachment due to new breaks...

10.3980/j.issn.2222-3959.2012.02.22 article EN PubMed 2012-01-01

To evaluate the central corneal thickness (CCT) measurements of premature infants.The infants who were born between 25-34wk gestational age (GA) retrieved for study. All CCT performed within first 2d their life under topical anesthesia by using an ultrasonic pachymeter.The mean 200 eyes was 647.79±63.94 µm. The right and left similar (647.30±64.72 µm 648.29±63.47 consecutively). girls 642.08±54.89 boys 653.07±71.14 µm, with no statistically significant difference (P>0.05). But there a...

10.3980/j.issn.2222-3959.2014.03.20 article EN DOAJ (DOAJ: Directory of Open Access Journals) 2014-01-01

Amaç: Klinik pratikte kullanılan iki el tipi taşınabilir otorefraktometre [Nidek HandyRef-K, Nidek, Tokyo, Japonya (HRK); Welch Allyn Spot Vision Screener, NewYork, ABD (WA)] ile pediatrik hasta grubunda elde edilen refraktif sonuçların karşılaştırılması amaçlandı. Gereç ve Yöntemler: Göz polikliniğine başvuran 1-10 yaş arasındaki çocuk hastalar, bu kesitsel gözlemsel çalışma kapsamına alındı. Yüz elli sekiz hastanın 158 gözünün refraksiyon değeri önce HRK sonra WA otorefraktometreleri...

10.5336/ophthal.2023-98913 article TR cc-by-nc-nd Turkiye Klinikleri Journal of Ophthalmology 2024-01-01

INTRODUCTION: Retinopathy of prematurity (ROP) is one the main reasons preventable childhood blindness. In development ROP, MicroRNAs may be effective in balance factors that inhibit and activate angiogenic factors. We aimed to determine changes blood levels miR-146a, miR-143, miR-210, miR-21, miR-126, miR-211, miR-221, miR-106 let 7f investigate their association with ROP. hypothesed level these miRNAs changed significantly ROP cases. MATERIALS AND METHODS: This observational study was...

10.3233/npm-230029 article EN Journal of Neonatal-Perinatal Medicine 2024-03-04

Purpose: To evaluate retinal nerve fiber layer thickness (RNFLT), ganglion cell (GCLT), subfoveal choroidal (SFCT), and central (CRT) in asthmatic children who were under inhaled corticosteroid treatment by using Swept-Source Optical Coherence Tomography (SS-OCT).Material methods: Fifty-three prospectively analyzed the study. Group 1 included 31 group 2 22 healthy children. Asthmatic received a dose 250 μg daily of fluticasone propionate (Flexotide, GlaxoSmithKline, Middlesex, UK). Allergy...

10.1080/15569527.2018.1539009 article EN Cutaneous and Ocular Toxicology 2018-10-26

To define late-stage fluorescein angiography (FA) findings in patients who received anti-vascular endothelial growth factor (VEGF) agents (intravitreal bevacizumab or aflibercept) as a treatment for stage 3 retinopathy of prematurity (ROP) zone II. We also compared the untreated eyes.Infants with history ROP underwent were evaluated retrospectively. The divided into 2 groups: those anti-VEGF and regressed spontaneously without treatment. Vascular abnormalities, such vascular leakage, shunts...

10.1177/11206721221076691 article EN European Journal of Ophthalmology 2022-02-22

We aimed to assess ocular surface characteristics in children with Hashimoto's thyroiditis without thyroid-associated ophthalmopathy and compare the results those of healthy children.Twenty-two (Group 1) 20 any and/or systemic disorder 2) were enrolled study. Ocular Surface Disease Index questionnaire, tear film osmolarity measurement (TearLab Osmolarity System, San Diego, CA, USA), Schirmer breakup time tests, meibography, conjunctival brush cytology performed compared between groups.The...

10.5935/0004-2749.20190056 article EN Arquivos Brasileiros de Oftalmologia 2019-01-01

To evaluate the effect of a single intravitreal bevacizumab (IVB) injection on blood flow parameters in ophthalmic artery (OA) and middle cerebral (MCA) infants with retinopathy prematurity (ROP).This prospective interventional study included 15 ROP who were treated IVB. Peak systolic velocity (PSV), end-diastolic velocity, mean (MV) resistivity index measured using pulse wave Doppler ultrasonography (Philips En Visor C, Amsterdam, The Netherlands) OA MCA, before IVB 1 day, week month after...

10.1159/000443208 article EN Ophthalmic Research 2016-01-01

Background: To assess Factor V Leiden (FVL) (rs6025), Prothrombin G20210A (rs1799963), MTHFR C677T (rs1801133), and A1298C (rs1801131) gene mutations as risk factors in the development of retinopathy prematurity (ROP).Materials methods: A total 105 children were included this cross-sectional study. Patients divided into two groups. The study group consisted 55 infants with a history ROP control comprised 50 healthy term birth. All subjects screened for presence certain (FVL, G20210A, A1298C)...

10.3109/13816810.2015.1126611 article EN Ophthalmic Genetics 2016-03-28

To evaluate changes in retrobulbar ocular blood flow parameters by using Colour Doppler Imaging (CDI) and foveal microvasculature Optical Coherence Tomography Angiography (OCTA) pediatric obese patients to compare them with a group of healthy children.Children diagnosed obesity without hypertension diabetes (39 subjects, group) age-matched controls (26 control underwent CDI OCTA imaging. Peak systolic velocity, end-diastolic velocity resistivity index from ophthalmic, central retinal...

10.1177/11206721221086244 article EN European Journal of Ophthalmology 2022-03-04

Amaç: Prematüre retinopatisi (PR) sıklığı ve risk faktörlerinin belirlenmesi Gereç Yöntemler: Dört yıllık sürede (1 Ocak 2011 - 27 Aralık 2014) yenidoğan yoğun bakım ünitemizde takip edilen, gebelik yaşı ≤ 32 hafta veya doğum ağırlığı 1500 g 888 preterm yenidoğanın PR tarama sonuçları geriye dönük olarak değerlendirildi. Tedavi alan almayan pretermlerin verileri Student T Ki kare testleri ile karşılaştırıldı. tedavisi için anlamlı bulunan değişkenler bağımsız faktörleri açısından lojistik...

10.16948/zktipb.474762 article TR Zeynep Kamil Tıp Bülteni 2019-03-05
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