Güvenç Toprak

ORCID: 0000-0001-8363-2983
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About
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Research Areas
  • Retinal Diseases and Treatments
  • Retinal Imaging and Analysis
  • Glaucoma and retinal disorders
  • Intraocular Surgery and Lenses
  • Cardiovascular Health and Disease Prevention
  • Vitamin D Research Studies
  • Ocular Infections and Treatments
  • Bone fractures and treatments
  • Ocular Diseases and Behçet’s Syndrome
  • Retinal and Optic Conditions
  • Vitamin C and Antioxidants Research
  • Potassium and Related Disorders
  • Retinal Development and Disorders
  • Bone health and osteoporosis research
  • Cardiovascular Disease and Adiposity
  • Systemic Sclerosis and Related Diseases
  • Salivary Gland Disorders and Functions
  • Thermoregulation and physiological responses
  • Retinal and Macular Surgery
  • Climate Change and Health Impacts
  • Connexins and lens biology
  • Ethics in medical practice
  • Electrolyte and hormonal disorders
  • Eicosanoids and Hypertension Pharmacology
  • Adipose Tissue and Metabolism

Bolu Abant İzzet Baysal University
2022-2024

Sivas State Hospital
2020

Erzurum Regional Training and Research Hospital
2017

Ankara Numune Eğitim ve Araştırma Hastanesi
2015

: This study explores the intricate connections between choroidal vascular index (CVI) and non-invasive ultrasonographic atherosclerosis predictors, shedding light on potential links ocular dynamics systemic cardiovascular health. We conducted a cross-sectional analysis of 81 participants, assessing CVI, intima-media thickness (IMT), extra-media (EMT), PATIMA index. The presence coronary artery disease (CAD) was also evaluated. Statistical methods included descriptive statistics, t-tests for...

10.1016/j.pdpdt.2024.104046 article EN cc-by-nc Photodiagnosis and Photodynamic Therapy 2024-03-11

This study aimed to determine whether children with distal radius impaction fractures have increased prevalence of 25-hydroxyvitamin D (25(OH) D) insufficiency compared healthy controls.This is a prospective controlled study. The 30 who were diagnosed forearm fracture at the orthopaedic emergency clinic included in and from routine paediatric outpatient unit as control group. Peripheric venous 25(OH) D, calcium (Ca), magnesium (Mg), phosphor (P), alkaline phosphatase (ALP) parathyroid...

10.1302/1863-2548.11.160008 article EN cc-by-nc Journal of Children s Orthopaedics 2017-06-01

Background:This study aimed to determine the prevalence of masked hypertension (MHT) and its association with asymptomatic organ damage (AOD) in a low socioeconomic district Ankara, Turkey. Material andMethods:We retrospectively reviewed data obtained from medical records 712 patients no known diagnosis who presented polyclinic due symptoms related elevated blood pressure (BP) were screened for MHT. Essential (EHT) existed 86 AOD. The presence AOD diagnosed MHT EHT was recorded....

10.12659/msm.892684 article EN Medical Science Monitor 2015-01-01

Purpose: Investigation of the acute effects cigarette smoking on eye using optical coherence tomography angiography (OCTA) young healthy non-smoking male subjects.Materials and methods: The right 25 subjects were included in this study. Selected parameters macular circumpapillary vasculature measured, including flow indices, foveal avascular zone, vessel densities macula optic disc OCTA. measurements performed first day without at 0 min, 5 30 min 60 min. Measurements repeated same regime...

10.1080/15569527.2020.1753762 article EN Cutaneous and Ocular Toxicology 2020-04-02

To evaluate the use of Pentacam to analyse presence or absence fluid pockets under anterior capsule and their significance in terms surgical management prevention complications.

10.1016/j.pdpdt.2024.104043 article EN cc-by-nc Photodiagnosis and Photodynamic Therapy 2024-03-07

Objective: The objective of this study was to evaluate and compare Optical Coherence Tomography Angiography (OCTA) parameters in patients with moderate myopia healthy individuals retrospectively. Methods: A total 80 male aged 18-20 years were included the 40 myopic persons. All participants underwent detailed ocular examination including refraction, intraocular pressure (IOP), visual acuity, biomicroscopy, OCTA measurement optic biometry measurement. Retinal, retinal nerve fiber layer...

10.1016/j.pdpdt.2024.104077 article EN cc-by-nc-nd Photodiagnosis and Photodynamic Therapy 2024-04-01

<title>Abstract</title> <bold>Purpose:</bold> The aim of this study was to evaluate the efficacy micronutrient therapy for individuals with neovascular age-related macular degeneration (nAMD) who were unable undergo intravitreal due COVID-19 pandemic. <bold>Material-Method: </bold>Patients diagnosed from March 2020 July 2021, ineligible therapy, had their medical records reviewed retrospectively. Those meeting inclusion criteria divided into two groups. Group 1 received regular...

10.21203/rs.3.rs-4447522/v1 preprint EN cc-by Research Square (Research Square) 2024-06-07

The study aimed to compare the development of asymptomatic cardiovascular (CV) organ damage in hypertensive patients with and without Sjogren syndrome (SS), a condition characterized by inflammatory processes that lead vascular damage. Forty SS (aged 18-65) 40 age- sex-matched this were included into study. Carotid intima-media thickness was measured from area 1 cm length proximal both carotid bulbs. Left ventricular mass index determined via echocardiography, microalbuminuria calculated...

10.1097/md.0000000000041041 article EN cc-by-nc Medicine 2024-12-27

To evaluate the acute effects of water drinking test (WDT) on eye using optical coherence tomography angiography (OCTA) healthy young male subjects.The study included 25 eyes subjects. Selected parameters retinal vasculature were measured, including macular flow indices, foveal avascular zone, and vessel densities (VDs) macula OCTA. The measurements taken first day without at 0 min, 30 min 60 then repeated second before after min. Paired Samples t-test measures One-way analysis variance used...

10.1080/15569527.2022.2126493 article EN Cutaneous and Ocular Toxicology 2022-09-28

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | 1479-6848 (online)

10.1530/endoabs.37.ep1021 article EN Endocrine Abstracts 2015-05-01

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | 1479-6848 (online)

10.1530/endoabs.37.ep548 article EN Endocrine Abstracts 2015-05-01

Purpose: We aim to compare the short-term effects of energy drink (ED), coffee, and water on eyes young healthy male subjects. Materials methods: The right 30 subjects were included in this study. measured intraocular pressure (IOP), mean arterial (MAP), retinal thickness (RT), choroidal (CT), nerve fiber layer (RNFL) using spectral domain optical coherence tomography (SD OCT). measurements for RT CT taken at fovea as well 1,500 µm nasal temporal fovea. performed first day before consumption...

10.7759/cureus.48335 article EN Cureus 2023-11-05

The choroidal vascularity index (CVI) is a method that measures the density of blood vessels in layer and can be used to evaluate effects hypertension. In this study we aimed investigate relationship between epicardial fat thickness (EFT) CVI patients with hypertension.This prospective included 112 diagnosed hypertension 120 healthy individuals. Patients' demographic data such as age, gender, weight, height, body mass (BMI), smoking status, presence coronary artery disease diabetes mellitus...

10.5830/cvja-2023-057 article EN PubMed 2023-11-20

Background/Aim: The most important complication after intravitreal injection (IVI) is endophthalmitis, which can result in severe vision loss. This study aims to investigate the effect of 0.25% povidone-iodine (PI) application before IVI on incidence endophthalmitis patients who received anti-vascular endothelial growth factor (anti-VEGF) injection. Methods: A total 15345 anti-VEGF injections and nine cases performed at outpatient room a single university hospital between January 2017 2020...

10.28982/josam.901604 article EN Journal of Surgery and Medicine 2021-05-01
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