Publications by authors named "Hasan A Bayhan"
Objectives: It was aimed to compare the clinical results of the mini-monovision technique (MMV) with enhanced monofocal intraocular lens (IOL) and trifocal IOL applications and to evaluate the intereye differences in the MMV group.
Materials And Methods: This retrospective observational study evaluated the results of cataract surgeries performed on 48 eyes of 24 patients. Surgeries in Group I were performed for MMV using the RayOne EMV IOL targeting emmetropia in dominant eyes (Group IA) and -0.
Objectives: To evaluate the clinical results of a new trifocal intraocular lens (IOL) with sinusoidal design by comparing with a traditional trifocal IOL.
Materials And Methods: A total of 79 patients undergoing uneventful microincisional cataract surgery with bilateral implantation of one of two types of trifocal IOLs, the Acriva Trinova IOL (VSY) or Acrysof IQ PanOptix IOL (Alcon), were enrolled in this prospective study. Visual and refractive outcomes, contrast sensitivity (CS), and defocus curve were assessed at 3 months after surgery.
Purpose: To evaluate the correlation between clinical tests, patient symptoms, and conjunctivochalasis in contact lens wearers and non-wearers.
Methods: This study comprised 40 eyes of 40 current soft contact lens users and 40 eyes of 40 control subjects. Cross-sectional areas of conjunctivochalasis at three locations (nasal, central, temporal) during straight and downward gazes were determined using anterior segment optical coherence tomography in all participants.
Background: In this study, we aimed to evaluate the association of lamina cribrosa thickness (LCT) and lamina cribrosa depth (LCD), as determined by spectral domain optical coherence tomography (SD-OCT), with visual evoked potentials (VEPs) in patients with multiple sclerosis (MS).
Materials And Methods: Patients enrolled in this prospective, cross-sectional study were divided into three groups. Group 1 consisted of 25 relapsing-remitting MS patients with VEP pathology in one or both eyes.
Objectives: This study aimed to evaluate the retinal vasculature of the macula and optic disc in patients with chronic obstructive pulmonary disease (COPD) by optical coherence tomography angiography (OCTA).
Methods: The right eyes of 70 COPD patients and 71 healthy individuals were evaluated. These patients had moderate airflow limitation and mean PO of 60 mmHg, and their average age was less than 60 years.
Objective: This study aimed to evaluate ocular vascularity in young adult migraine patients with visual aura and without visual aura.
Material And Methods: The study included 30 patients with migraine with visual aura (MWVA), 30 patients with migraine without visual aura (MWOVA), and 30 healthy control subjects, all between ages ≥18 and <45. Migraine patients were applied Headache Impact Test (HIT) and Migraine Disability Assessment Scale (MIDAS).
Objective: The objective of this study is to evaluate the corneal endothelium in patients with chronic obstructive pulmonary disease (COPD) using a specular microscope.
Methods: The right eyes of 64 patients with a COPD diagnosis and 65 healthy individuals were evaluated. Cell density (CD) (cell/mm ), corneal thickness (CT) (μ), hexagonal cell ratio (%), and coefficient of variation (cell area standard deviation/mean cell area, μm ) were analyzed by specular microscopy (SM).
Purpose: In the present study we evaluate the corneal endothelium using specular microscopy in patients with obstructive sleep apnea syndrome (OSAS).
Methods: The study included a total of 100 patients including 35 patients with mild OSAS, 34 patients with moderate OSAS and 31 patients with severe OSAS, and the right eyes of 30 patients as a control group. Patients were examined to exclude the possibility of ocular diseases.
Introduction: Nasal septal deviation (NSD) is one of the major causes of upper airway obstruction. Chronic hypoxia and hypercapnia due to NSD may affect the choroidal blood flow and may change the choroidal thickness (CT). In this study, the authors aimed to research the assessment of CT before and after septoplasty in patients with NSD.
View Article and Find Full Text PDFPurpose: To evaluate the effects of chronic smoking on tear function tests and meibomian glands.
Methods: This prospective study included 40 volunteers with a long-term (> 5 years) cigarette smoking history (study group) and 43 non-smoking healthy individuals (control group). The symptoms of all the participants were scored using the Ocular Surface Disease Index (OSDI) questionnaire, and a detailed ophthalmological examination was performed including the tear breakup time (TBUT) and Schirmer test (with anaesthesia).
: To evaluate the effect of multiple sclerosis (MS) on the amplitude of accommodation (AA) and retinal nerve fiber layer (RNFL) thickness.: A total of 25 MS patients with visual-evoked potential (VEP) abnormalities (MS/+VEP Group), 25 MS patients without VEP abnormalities (MS/-VEP Group), and 25 controls (Control Group) were enrolled. Only findings from the right eye of the participants were included in the analysis.
View Article and Find Full Text PDFPurpose: To evaluate the effects of different contact lens (CL) replacement schedules and different CL materials on the ocular surface and tear function.
Methods: Daily disposable hydrogel CLs were given to group 1 (n = 22), daily disposable silicone hydrogel CLs were given to group 2 (n = 25), and reusable silicone hydrogel CLs were given to group 3 (n = 24). Tear function tests and inflammatory cytokine [interleukin (IL)-6, IL-8, IL-17A, and matrix metalloproteinase (MMP)-9] levels were evaluated before and at 1 and 3 months after CL usage.
Purpose: To evaluate choroidal thickness (CT) in the eyes of children with hyperopic anisometropic amblyopia and to assess changes in CT during amblyopia treatment using spectral-domain optical coherence tomography (SD-OCT).
Methods: This longitudinal study, initially enrolled 40 patients, aged 3-9 years with hyperopic anisometropic amblyopia. Patients underwent treatment with refractive correction alone for 16 weeks and if needed, with refractive correction and patching treatment thereafter (6 months).
Objectives: To evaluate the conjunctival bacterial flora in diabetic patients and nondiabetic subjects.
Materials And Methods: Fifty-three diabetic patients and 43 nondiabetic healthy individuals were included in the study. A specimen was taken from each participant for the study by rubbing a sterile cotton-tipped swab on the inferior palpebral conjunctiva of the right eye.
Effects of topical acne treatment on the ocular surface in patients with acne vulgaris.
Cont Lens Anterior Eye
December 2016
Purpose: To assess the ocular side effects during topical retinoid-antibiotic combination treatment in patients with facial acne vulgaris.
Methods: Forty-three patients applying topical isotretinoin+erythromycin combination (isotrexin gel, GlaxoSmithKline) once daily for the treatment of acne vulgaris were enrolled. Full ophthalmologic examination, Schirmer test (with topical anesthesia), fluorescein break-up time (BUT), corneal fluorescein staining and tear osmolarity measurement with the TearLab system (TearLab Corporation) were carried out before and at the end of the first month of the treatment.
Purpose: The aim of the study was to analyze the effects of uneventful phacoemulsification surgery on choroidal thickness (CT) using spectral domain optical coherence tomography (SD-OCT).
Methods: In this prospective study, 38 eyes of 38 patients having phacoemulsification surgery were included. All patients underwent detailed ophthalmologic examination, including preoperative axial length (AXL) measurement with optical biometry and intraocular pressure (IOP) measurement preoperatively and 1 month postoperatively.
Objective: To evaluate the impact of osmoprotective eye drops on tear osmolarity and patient comfort, and to compare its efficacy with a commercially available lubricant in contact lens (CL) wearers.
Design: Prospective, cross-sectional study.
Participants: Forty eyes of 20 first-time CL wearers were included.
Purpose: To analyze the density and morphology of corneal epithelial cells and keratocytes by in vivo confocal microscopy (IVCM) in patients with herpes zoster ophthalmicus (HZO) as associated with corneal innervation.
Design: Prospective, controlled and masked cross-sectional study.
Methods: setting: Single-center study.
Purpose: To report a case of marginal keratitis that developed after intravitreal ranibizumab injection.
Methods: A 56-year-old man with diffuse diabetic macular edema received intravitreal injection of ranibizumab into his right eye.
Results: One day after injection, the patient presented with pain, redness, tearing, and discomfort in his right eye.
Purpose: To evaluate the choroidal thickness (CT) in pseudoexfoliative (PEX) glaucoma and age-matched healthy subjects using spectral optical coherence tomography (SD-OCT).
Patients And Methods: In this prospective study, 32 eyes of 32 PEX glaucoma patients and 30 eyes of 30 age-matched healthy subjects were enrolled. The CT is measured perpendicularly (from the outer edge of the hyperreflective retinal pigment epithelium to the inner sclera) at the fovea, and 1.
Background: To assess the choroidal thickness (CT) in patients with obstructive sleep apnoea syndrome (OSAS) and healthy controls.
Design: Prospective, cross-sectional study
Participants: Ninety-two eyes of 92 patients with OSAS and 32 eyes of 32 aged and body mass index-matched healthy subjects were enrolled.
Methods: OSAS patients were further divided into mild, moderate and severe OSAS groups according to their apnoea hypopnea index (AHI) values.