Mehmet Sahin Sevim

Publications (8)12.12 Total impact

• Article: Primary probing for congenital nasolacrimal duct obstruction with manually curved Bowman probes.

  Didem Serin, Ibrahim Bulent Buttanri, Mehmet Sahin Sevim, Bahtinur Buttanri
  [show abstract] [hide abstract]
  ABSTRACT: To evaluate the effect of the shape of Bowman probes on the success of primary probing for congenital nasolacrimal duct obstruction. Records of 42 nasolacrimal duct obstructions in 37 children who underwent probing with straight Bowman probes (group A) and 128 nasolacrimal duct obstructions in 110 children who underwent probing with Bowman probes manually bent to mimic the natural curve of the bony nasolacrimal pathway (group B) were evaluated and compared. All children were under 2 years of age. The main outcome was successful probing. Successful probing was defined as a complete resolution of signs and symptoms. The mean age of the patients was 16.4 ± 4.1 months (range 8-24 months) in group A and 16.8 ± 4.2 months (range 7-24 months) in group B. No canalicular or nasolacrimal sac pathologies were diagnosed during probing. The success rate was 76.2% (32/42) in group A and 91.4% (117/128) in group B. The difference was statistically significant (P < 0.01). Manually curved probes can be used efficiently during probing and increase the success rates.
  Clinical ophthalmology (Auckland, N.Z.) 01/2013; 7:109-12.
• Article: Effect of Intravitreal Bevacizumab Injection before Ahmed Glaucoma Valve Implantation in Neovascular Glaucoma.

  Mehmet Sahin Sevim, Ibrahim Bulent Buttanri, Suleyman Kugu, Didem Serin, Semra Sevim
  [show abstract] [hide abstract]
  ABSTRACT: Purpose: To assess the efficacy of preoperative intravitreal bevacizumab injection (IVB) before Ahmed glaucoma valve (AGV) implantation in the treatment of neovascular glaucoma (NVG). Methods: This retrospective, comparative and consecutive case series study included 41 eyes from 41 patients who underwent AGV implantation for treatment of NVG. The study group was composed of 19 patients (19 eyes) to whom IVB was administered before surgery, while the control group was composed of 22 patients (22 eyes) to whom IVB was not administered before AGV implantation. Findings such as intraocular pressures measured before and after surgery, surgical success rates, and postoperative complications were compared between the groups. Results: There were no significant differences in preoperative data between groups. The surgical success rate in the study group (79%) was better than in the control group (64%), but this difference was not statistically significant (p = 0.28). Early postoperative complications such as fibrinous reaction in the anterior chamber as well as hyphema were less frequently observed in the study group. Conclusions: Intravitreal bevacizumab is a useful preparatory step to safely and effectively implant an aqueous shunting tube in eyes with severe NVG and intractable intraocular pressure.
  Ophthalmologica 01/2013; 229(2):94-100. · 1.42 Impact Factor
• Article: Corneal biomechanical properties in patients with recurrent anterior uveitis.

  Ece Turan-Vural, Banu Torun Acar, Mehmet Sahin Sevim, Ibrahim Bulent Buttanri, Suphi Acar
  [show abstract] [hide abstract]
  ABSTRACT: Purpose: This study aimed to investigate the biomechanical changes in cornea in patients with recurrent anterior uveitis in comparison to healthy controls. Methods: Eighty-five eyes in 51 patients with inactive recurrent anterior uveitis (25 male, 26 female) and 34 eyes of 34 age-matched control subjects (16 male, 18 female) were included. The following measurements were done and compared between patients and controls: corneal hysteresis, corneal response factor, intraocular pressure, and central corneal thickness. Results: Patients had significantly lower mean corneal hysteresis (8.57 ± 1.60 versus 10.91 ± 1.41, p = .001) and corneal resistance factor (9.24 ± 1.68 versus 11.56 ± 1.46, p = .001) when compared to controls. Among patients, corneal hysteresis and corneal resistance factor did not correlate with duration of the disease or number of attacks per year. Conclusions: Anterior uveitis seems to be associated with impaired biomechanical strength of the cornea, although no correlations with the duration of illness or attack frequency could be determined.
  Ocular immunology and inflammation 07/2012; 20(5):349-53. · 0.72 Impact Factor
• Article: Reply: Anterior capsulorhexis creation in modified capsular tension ring implantation.

  Ibrahim Bulent Buttanri, Mehmet Sahin Sevim, Didem Serin
  Journal of cataract and refractive surgery 07/2012; 38(7):1303-4. · 2.75 Impact Factor
• Article: Ability of Fourier-domain Optical Coherence Tomography to Detect Retinal Ganglion Cell Complex Atrophy in Glaucoma Patients.

  Mehmet Sahin Sevim, Bulent Buttanri, Banu Torun Acar, Alev Kahya, Ece Turan Vural, Suphi Acar
  [show abstract] [hide abstract]
  ABSTRACT: PURPOSE:: To evaluate the diagnostic ability of Fourier-domain optical coherence tomography (FD-OCT) measurements in both normal individuals and patients with different stages of glaucoma. PATIENTS AND METHODS:: A total of 113 patients diagnosed with glaucoma and classified into different stages of glaucoma according to Glaucoma Staging System 2 and 30 healthy individuals were included in this study. In all patients, parameters of both the retinal ganglion cell complex (GCC) and the peripapillary retinal nerve fiber layer were measured by FD-OCT (RTVue-100). Comparisons were made from measurements in patients with different stages of glaucoma. RESULTS:: Both GCC and retinal nerve fiber layer thickness values of patients with glaucoma were statistically significantly lower compared with those of healthy individuals. As the stage of glaucoma progressed, the mean GCC and retinal nerve fiber layer thickness values decreased. CONCLUSIONS:: GCC and retinal nerve fiber layer thickness measurements performed by FD-OCT showed high diagnostic ability in detecting glaucoma. Mean thickness values can be determined for each glaucoma stage.
  Journal of glaucoma 03/2012; · 1.74 Impact Factor
• Article: Modified capsular tension ring implantation in eyes with traumatic cataract and loss of zonular support.

  Ibrahim Bulent Buttanri, Mehmet Sahin Sevim, Didem Esen, Banu Torun Acar, Didem Serin, Suphi Acar
  [show abstract] [hide abstract]
  ABSTRACT: To evaluate the outcomes of implantation of a Cionni modified capsular tension ring (CTR) and a posterior chamber intraocular lens (PC IOL) in patients with traumatic cataract and loss of zonular support. Eye Clinic II, Haydarpasa Numune Education and Research Hospital, Istanbul, Turkey. Case series. Eyes with traumatic cataract and loss of zonular support had phacoemulsification with implantation of a foldable IOL and a 1- or 2-eyelet modified CTR. Preoperative features, preoperative and postoperative corrected distance visual acuity (CDVA), intraoperative performance, IOL position, and complications were evaluated. The study enrolled 16 eyes (16 patients). The mean CDVA was 0.89 logMAR ± 0.41 (SD) preoperatively and 0.33 ± 0.43 logMAR at the last postoperative examination (P=.001). Postoperatively, the mean spherical equivalent was -0.23 diopter (D) (range -1.50 to +1.00 D) and the mean postoperative astigmatism, 1.59 D (range 0.50 to 4.00 D). Eight eyes (50.0%) had phacodonesis preoperatively; no eye had pseudophacodonesis postoperatively. Preoperatively, 10 eyes (62.5%) had symptomatic decentration. Two eyes (12.5%) had asymptomatic nonprogressive decentration in the early postoperative period; no eye had symptomatic decentration throughout the follow-up. Three eyes (18.8%) preoperatively and 1 eye (6.2%) postoperatively had vitreous in the anterior chamber. Four eyes (25.0%) required anterior vitrectomy. Other complications were symptomatic posterior capsule opacification in 8 eyes (50.0%) and transient increased intraocular pressure in 2 eyes (12.5%). The use of a modified CTR preserved the capsular bag and resulted in good PC IOL centration with few significant complications in patients with traumatic cataract and loss of zonular support. No author has a financial or proprietary interest in any material or method mentioned.
  Journal of cataract and refractive surgery 03/2012; 38(3):431-6. · 2.75 Impact Factor
• Article: Corneal endothelial cell loss in post-penetrating keratoplasty patients after cataract surgery: phacoemulsification versus planned extracapsular cataract extraction.

  Banu Torun Acar, Ibrahim Bulent Buttanri, Mehmet Sahin Sevim, Suphi Acar
  [show abstract] [hide abstract]
  ABSTRACT: To compare the changes in endothelial cell density (ECD) in post-penetrating keratoplasty (PKP) patients after cataract extraction with phacoemulsification or planned extracapsular cataract extraction (ECCE). Haydarpasa Numune Education and Research Hospital, Ophthalmology Clinic, Istanbul, Turkey. Clinical trial. Eyes with hard nuclear cataract that had previous PKP were randomly assigned to have phacoemulsification or ECCE. Noncontact specular microscopy was performed preoperatively and 1, 3, and 6 months postoperatively. Twenty-six eyes of 26 patients were enrolled (14 phacoemulsification; 12 ECCE). Six months postoperatively, the mean corneal ECD was statistically significantly lower in the phacoemulsification group (1869.50 cells/mm(2) ± 158.05 [SD]) than in the ECCE group (1996.00 ± 127.96 cells/mm(2)) (P=.024). The mean percentage of endothelial cell loss at 6 months was 20.3% and 12.7%, respectively (P<.05). In both groups, there was no significant difference in the percentage hexagonality between preoperatively and postoperatively (P>.05). Extracapsular cataract extraction seemed to cause less endothelial cell damage than phacoemulsification in post-PKP patients with hard nuclear cataract.
  Journal of cataract and refractive surgery 08/2011; 37(8):1512-6. · 2.75 Impact Factor
• Source

  Available from: PubMed Central

  Article: Outcomes of 23-gauge pars plana vitrectomy and internal limiting membrane peeling with brilliant blue in macular hole.

  Huseyin Sanisoglu, Mehmet Sahin Sevim, Betul Aktas, Semra Sevim, Ahmet Nohutcu
  [show abstract] [hide abstract]
  ABSTRACT: The evaluation of anatomic and visual outcomes in macular hole cases treated with internal limiting membrane (ILM) peeling, brilliant blue (BB), and 23-gauge pars plana vitrectomy (PPV). Fifty eyes of 48 patients who presented between July 2007 and December 2009 with the diagnosis of stage 2, 3, or 4 macular holes according to Gass Classification who had undergone PPV and ILM peeling were included in this study. Pre- and postoperative macular examinations were assessed with spectral-domain optical coherence tomography. 23 G sutureless PPV and ILM peeling with BB was performed on all patients. The mean age of patients was 63.34 ± 9.6 years. Stage 2 macular hole was determined in 17 eyes (34%), stage 3 in 24 eyes (48%), and stage 4 in 9 eyes (18%). The mean follow-up time was 13.6 ± 1.09 months. Anatomic closure was detected in 46/50 eyes (92%), whereas, in four cases, macular hole persisted and a second operation was not required due to subretinal fluid drainage. At follow-up after 2 months, persistant macular hole was detected in one case and it was closed with reoperation. At 12 months, an increase in visual acuity in 41 eyes was observed, while it remained at the same level in six eyes. In three eyes visual acuity decreased. There was a postoperative statistically significant increase in visual acuity in stage 2 and 3 cases (P < 0.05), however, no increase in visual acuity in stage 4 cases was observed. PPV and ILM peeling in stage 2, 3, and 4 macular hole cases provide successful anatomic outcomes, however, in delayed cases, due to photoreceptor loss, it has no effect on functional recovery. BB, used for clarity of ILM, may be beneficial due to its low retinal toxicity.
  Clinical Ophthalmology 01/2011; 5:1177-83.