Publications by authors named "Kemal Ozulken"
Objective: Ganglion cell layer thickness (GCLT) may be used as a potential marker for central neural changes. We compared GCLT by using spectral domain optical coherence tomography (SD-OCT) in patients with primary headache disorders and healthy controls. We seek whether there was any difference between the headache groups and whether any clinical parameters correlated to GCLT.
View Article and Find Full Text PDFBackground: To assess the variability in wavefront aberrations with short-term wear of photochromic senofilcon A contact lenses in both its activated and inactive states.
Methods And Material: In this cross-sectional study, 20 participants who had previously used soft contact lenses were enrolled. Corneal aberrometry measurements were performed on each subject, without contact lenses, using Sirius Scheimpflug-Placido topography.
Background: Retinal abnormalities are being increasingly reported in COVID-19, in addition to the well-known symptoms of this disease accounting for the neurological involvement. In this study, we aimed to investigate whether ganglion cell layer thickness (GCLT) was different in recovered COVID-19 patients compared to controls in the subacute stage and to determine whether it correlated with COVID-19-related neurological symptoms or pneumonia.
Methods: This study involved 40 patients who had recovered from COVID-19 and 40 age- and sex-matched healthy controls.
Introduction: Neurological aspect of COVID-19 is less understood compared to its respiratory and systemic effects. We aimed to define subacute neurological sequelae in patients who recovered from mild COVID-19.
Materials And Methods: This study enrolled long COVID patients who had mild infection, were non-hospitalized, and admitted to our hospital with neurological complaints occurring after COVID-19.
Acute clouding of a trifocal intraocular lens during implantation: A case report.
Am J Ophthalmol Case Rep
March 2022
Purpose: In this paper, we present a case of acute clouding of a trifocal intraocular lens (IOL) that resolved spontaneously by the day after surgery.
Observations: A 68-year-old woman with a nuclear cataract in the right eye was scheduled for cataract surgery with +21.00 diopter trifocal IOL (AT LISA tri 839MP, Carl Zeiss Meditec AG, Germany) implantation.
Purpose: To evaluate the clinical effect of topical cyclosporine A (CsA) (0.05%) on dry eye patients with Sjogren's syndrome (SS) and non-Sjogren's syndrome (NSS).
Method: This retrospective comparative study includes the dry eye (DE) patients who were treated with topical CsA.
Purpose: To evaluate and compare the visual performance and quality of life (QOL) associated with refractive/extended depth of focus (EDOF) intraocular lenses (IOLs) and diffractive trifocal IOLs in refractive lens exchange patients.
Materials And Methods: This was a comparative interventional study of patients undergoing implantation of Lucidis (Swiss Advanced Vision, SAV‑IOL SA, Neuchâtel, Switzerland) or AT LISA tri 839MP (Carl Zeiss Meditec AG, Germany) IOLs. Near, intermediate, and distance best corrected and uncorrected visual acuities were collected at 1 and 3 months postoperatively.
Objectives: To evaluate the early effects of femtosecond laser-assisted in situ keratomileusis (LASIK) surgery on retinal ganglion cell thickness (GCT), peripapillary retinal nerve fiber thickness (NFT), and central macular thickness (CMT) obtained by spectral domain optical coherence tomography (SD-OCT) in a healthy population.
Materials And Methods: This case-control study included data from the right eye of 40 subjects without any disease other than refractive error and who had undergone femtosecond LASIK surgery. The preoperative, postoperative 1-hour, and postoperative 3-week GCT, NFT, and CMT values obtained by SD-OCT were compared.
Objectives: To compare the asphericity and higher-order aberration (HOA) outcomes of single-step transepithelial photorefractive keratectomy (tPRK) and conventional alcohol-assisted PRK (aaPRK) in patients with myopia and myopic astigmatism.
Materials And Methods: Of the 108 eyes of 54 patients enrolled in the study, tPRK was performed on 54 (50%) eyes and aaPRK was performed on 54 (50%) eyes. The following parameters were compared: corrected distance visual acuity (CDVA), spherical equivalent (SE), flat and steep keratometry, intraocular pressure, central corneal thickness, asphericity, and HOAs including horizontal and vertical coma, horizontal and vertical trefoil, spherical aberration, second-order vertical coma, and aberration coefficient.
Background: To evaluate the preliminary effects of treating the half of high latent hyperopia on refractive and visual outcomes of femtosecond laser-assisted in situ keratomileusis (LASIK) in young subjects with hyperopia.
Methods: This non-randomized comparative study includes 120 eyes of 60 subjects who underwent femtosecond LASIK to correct hyperopia. Group 1 (n = 60) includes subjects with ≤ 1D algebraic difference (DRSE) between cycloplegic (CRSE) and manifest (MRSE) refraction spherical equivalents and was treated by entering manifest refraction values.
: To compare the outcomes of non-invasive break-up time (NI-BUT) test and the other conventional dry eye tests.: The right eyes of 170 subjects were included in the study. In order to evaluate the tear quality of the patients, NI-BUT levels were measured by the Scheimplug-Placido disk system (Sirius topography).
View Article and Find Full Text PDFPurpose: To investigate the corneal topometric and tomographic findings that can be used in the diagnosis of subclinical keratoconus.
Methods: A retrospective cohort study. The study group was selected from patients with clinically evident keratoconus in one eye and subclinical keratoconus without evident topographic findings in fellow eye.
To evaluate the postoperative higher-order aberration (HOA) differences and visual quality outcomes of wavefront-optimised photorefractive keratectomy (PRK) surgery in 6.5-mm and 7.0-mm optic zones.
View Article and Find Full Text PDFBackground: Corneal cross-linking treatment is the unique treatment method that can cease the progression of keratoconus disease. Because of the long duration of conventional treatment, accelerated cross-linking treatment methods are being developed.
Aims: To compare two different accelerated corneal cross-linking protocols in terms of postoperative visual acuity and topographic findings (higher-order aberrations and keratometry values).
Objective Accommodation Amplitude Measurements Using a New Autorefractometer Device.
Beyoglu Eye J
December 2019
Objectives: To measure the value of objective accommodation amplitude (AA) in patients using the new autorefractometer device and to evaluate the effects of age, refraction errors, pupil diameter on objective AA measurements.
Methods: Three hundred subjects who were divided into five groups according to age were enrolled in this study. AA and pupil diameter were measured three times from both eyes using Tonoref III (NIDEK Co.
Aim: To compare the postoperative one-year outcomes of asphericity (Q) and high order aberration (HOA) values of 9.0 and 9.2 mm diameter flap groups in hypermetropia and hypermetropic astigmatism subjects who underwent femtosecond laser in-situ keratomileusis (LASIK).
View Article and Find Full Text PDFPurpose: To investigate the effect of topical pilocarpine on topical cycloplegia and on the results of refractive surgery.
Methods: The study included 100 eyes of 100 patients who underwent laser-assisted in situ keratomileusis. Group 1 comprised patients who wanted to undergo surgery on the same day after cycloplegic examination and were applied with 2% pilocarpine hydrochloride; group 2 comprised patients whose pupils spontaneously went into the natural position.
Purpose: To investigate the clinical effects of different orientation and magnitude of cyclotorsion on the compensation capacity of the WaveLight EX500 photorefractive keratectomy (PRK) platform.
Methods: This retrospective study comprised 400 eyes of 200 patients who underwent bilateral simultaneous PRK due to compound myopic astigmatism. The subjects were separated according to the orientation of cyclotorsion into incyclotorsion and excyclotorsion groups, and by the magnitude of cyclotorsion into group 1 (0.
Objectives: To evaluate the additive effect of topical nepafenac on pupil diameter (PD) in patients with diabetes mellitus (DM) and cataract.
Methods: This prospective comparative study included the patients having cataract surgery with and without DM. Two consecutive PD measurements were taken using an automatic quantitative pupillometry system (MonPack One, Metrovision).
Purpose: To evaluate the postoperative high-order aberration differences of femto-LASIK surgery in 6.5 and 7 mm optic zones.
Patients And Methods: We retrospectively reviewed 80 eyes of 40 patients with myopia or myopia with astigmatism who underwent femtosecond LASIK surgery.
Purpose: To compare the efficacy of Samfilcon A and Lotrafilcon B bandage contact lenses after photorefractive keratectomy (PRK).
Methods: In this study, patients with bilateral PRK were assigned for the fitting of Lotrafilcon B lens and Samfilcon A lens. The patients were examined on the day of surgery and on postoperative days 1, 2 and 3.
Purpose: To compare the refractive outcomes and aberration data analysis of wavefront-optimized (WFO) ablation and topography-guided Contoura ablation (TGCA) (Contoura on the WaveLight laser; WaveLight GmbH, Erlangen, Germany) in patients who had laser-assisted in situ keratomileusis (LASIK) for myopia or myopic astigmatism.
Methods: In this comparative contralateral eye study, patients who underwent LASIK with TGCA in one eye and with WFO ablation in the fellow eye were analyzed. Aberration measurements and corneal topography were analyzed using the WaveLight Oculyzer II diagnostic device (Alcon Laboratories, Inc.
Purpose: To investigate the corneal densitometry in subclinical keratoconus with normal elevation and pachymetric parameters.
Methods: Patients with clinical keratoconus in one eye and subclinical keratoconus in the fellow eye were identified. The study group was selected from patients with subclinical keratoconus who showed normal results from topographic and Belin-Ambrósio Enhanced Ectasia Display III (BAD) analysis (Kmean <47.
Purpose: To evaluate the effect of pterygium and pterygium surgery on corneal biomechanics by ocular response analyzer (ORA, Reichert, USA).
Methods: This study considered 68 eyes (from 34 patients with a mean age of 21.2±7.
Purpose:: To investigate the relationship between biomechanical properties of the cornea and postoperative refractive changes in patients with low-level astigmatism after cataract surgery.
Methods:: This prospective study recruited patients undergoing cataract surgery involving 2.8-mm superior incisions.