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Öğe Bilateral severe anterior uveitis after unilateral selective laser trabeculoplasty(WILEY, 2013) Koktekir, Bengu E.; Gedik, Sansal; Bakbak, Berker[Abstract not Available]Öğe Comparison of Central Corneal Thickness Measurements With Optical Low-Coherence Reflectometry and Ultrasound Pachymetry and Reproducibility of Both Devices(LIPPINCOTT WILLIAMS & WILKINS, 2012) Koktekir, Bengu E.; Gedik, Sansal; Bakbak, BerkerPurpose: To compare the accuracy of optical low-coherence reflectometry (Lenstar LS 900; Haag Streit, Koniz, Switzerland) and conventional ultrasound pachymetry (UP) (US 4000; Nidek, Japan) for measuring central corneal thickness and to assess the interexaminer reproducibilities of both devices. Methods: Department of Ophthalmology, Selcuklu Faculty of Medicine, Selcuk University was the study setting. Central corneal thickness (CCT) was measured in both eyes of 65 emmetropic patients by the same examiner using Lenstar LS 900 noncontact biometry and UP. To assess the interexaminer reproducibility, 2 different examiners consecutively obtained CCT measurements in 16 eyes with Lenstar LS 900 noncontact biometry and UP. Results: Mean CCT measurements with Lenstar LS 900 noncontact biometry and ultrasound biometry were 541.09 +/- 33.8 and 545.69 +/- 34.0, respectively. Significant correlation was present between these 2 measurements; intraclass correlation coefficient was found to be 95.8% (95% confidence interval: 93.2%-97.4%) (P < 0.001). Interexaminer reproducibility with Lenstar was high, and the intraclass correlation was found to be 99.3% (95% confidence interval: 98.0%-99.7%). We have also investigated the interexaminer reproducibility with UP in these 16 patients, and the results showed a 99.2% (95% confidence interval: 97.7%-99.7%) intraclass correlation. Conclusions: The results of Lenstar LS 900 noncontact biometry correlated with the results of UP. It may be used as an alternative method to UP for measuring CCT. Because of the mild underestimation of CCT by Lenstar, the measurements should be carefully evaluated in patients whose intraocular pressure must strictly be monitored.Öğe Comparison of pupil diameter measurement with Lenstar LS 900 and OPD Scan II. Not interchangeable devices(SAUDI MED J, 2012) Gedik, Sansal; Koktekir, Bengu E.; Bakbak, Berker; Gonul, Saban[Abstract not Available]Öğe Dry Eyes and Migraines: Is There Really a Correlation?(LIPPINCOTT WILLIAMS & WILKINS, 2012) Koktekir, Bengu E.; Celik, Guner; Karalezli, Aylin; Kal, AliPurpose: The purpose of this study was to evaluate the tear film functions and clinical symptoms of patients with migraines. Methods: This observational comparative study consisted of 33 migraine (26 women and 7 men) patients referred from neurology clinics and 33 (22 women and 11 men) control subjects referred from ophthalmology outpatient clinics. The control subjects had neither systemic nor ocular disease nor any type of headache. All 66 patients underwent a complete ophthalmic examination and diagnostic tests for dry eye, including tear break-up time, Schirmer test with topical anesthesia, lissamine green staining, and an ocular surface disease score. Patients with migraine were classified as migraine with an aura, migraine without an aura, and basilar migraine; a pain score from 1 to 4 was determined for each patient, based on the American Headache Society's Migraine Disability Assessment Test. Results: Of the 33 patients who participated in the migraine group, 17 (51%) suffered from migraine with aura, 11 (33%) suffered from migraine without aura, and 5 (15%) suffered from basilar migraine. Significant differences in dry eye scores were found between the patients with migraine and the control subjects. In the migraine group, the mean tear break-up time was 7.75 +/- 2.37 seconds, whereas in the control group it was 9.15 +/- 1.93 seconds. For the Schirmer test, the migraine group had a mean value of 12.09 +/- 4.95 mm/5 minutes, whereas the control group had a mean value of 14.90 +/- 4.26 mm/5 minutes. Testing with lissamine green staining resulted in a mean value of 1.00 +/- 0.16 in the migraine group and 0.30 +/- 0.46 in the control group. In the migraine group, the mean for the ocular surface disease index scoring was 36.27 +/- 17.54. In the control group, it was 28.42 +/- 9.0. A significant difference (P < 0.05) was found in the dry eye syndrome testing results between the 2 groups in this study. Conclusions: An increased frequency of dry eye disease was found to occur in patients with migraine, which might suggest that migraine headaches are related to dry eye disease. Some migraine attacks may be aggravated in the presence of dry eye syndrome.Öğe The Effect of Pupil Dilation on Biometric Parameters of the Lenstar 900(LIPPINCOTT WILLIAMS & WILKINS, 2013) Bakbak, Berker; Koktekir, Bengu E.; Gedik, Sansal; Guzel, HuseyinPurpose: To evaluate the effect of pupil dilation on the biometric parameters of the Lenstar LS 900 (Haag Streit AG, Koeniz, Switzerland). Methods: In this cross-sectional study of 33 eyes with cataracts, axial length (AL), anterior chamber depth, intraocular lens (IOL) power, keratometry, and pupil diameter measurements were performed using Lenstar biometry before and after pupil dilatation. Intraobserver repeatability was assessed by taking 2 consecutive recordings of biometric parameters using Lenstar biometry in the undilated pupils of 30 eyes with cataracts. Results: The mean difference in AL measurements from intraobserver readings was -0.001 +/- 0.01 mm. The study group showed a statistically significant change in the first keratometry reading and anterior chamber depth values (P < 0.05); however, the mean difference in AL and IOL power was statistically insignificant between the undilated and dilated pupil Lenstar biometry readings. Three cases in the study group (9.1%) and 1 case in the control group (3.3%) demonstrated changes in IOL power >0.50 diopter. Conclusions: Dilated and undilated pupil size did not affect the measurement of IOL using the Lenstar biometry.Öğe Iatrogenic Cerebrospinal Fluid Oculorrhea(LIPPINCOTT WILLIAMS & WILKINS, 2014) Chi, Mijung; Kim, H. Jane; Koktekir, Bengu E.; Vagefi, Reza; Kersten, Robert C.Cerebrospinal fluid leakage into the orbit (CSF orbitorrhea) or through the orbit to the exterior (CSF oculorrhea) occurs when there is a communication between orbit and subarachnoid space. It has rarely been described. We report a case of CSF oculorrhea following surgery for recurrent sphenoid wing meningioma. A 67-year-old patient who underwent craniotomy for a recurrent sphenoid wing meningioma complained of tearing from the ipsilateral eye. Fluid collection was observed in the right periorbital area contiguous with craniotomy wound. With wide retraction of eyelids, a 1-cm longitudinal full-thickness laceration through the conjunctiva toward the lateral orbital rim was visualized in the area of the lateral canthal tendon. Steady leakage of pink-tinged serous fluid through the forniceal laceration was observed. With a presumed diagnosis of iatrogenic CSF oculorrhea, the patient was treated conservatively with resolution by postoperative day 6.
