Yazar "Doganay, Derya" seçeneğine göre listele

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    Active silicone oil removal with 23 gauge transconjunctival system; ‘’Doganay silicone oil extraction system’’
    (2019) Doganay, Derya; Doganay, Selim; Cankaya, Cem
    Aim: To describe a new and simple silicone oil removal method with 23-gauge (G) transconjunctival vitrectomy system. Material and Methods: This is a prospective, single center, interventional clinical trial. A hundred thirty-three eyes of 133 patients were enrolled in this study. 1000 centistoke (cSt) silicone oil was removed with our new method. Main outcome measurements were silicone oil removal time, number of sutured 23 G sclerotomy sites, intraoperative and postoperative complications, preoperative and postoperative intraocular pressure (IOP) alterations, and preoperative and postoperative visual acuity changes. Results: The mean time between pars plana vitrectomy surgery with silicone oil endotamponade and silicone oil removal was 8.5±3.5 months. Mean silicone oil removal time was 141.7±37.7 seconds. 210 of total 293 sclerotomies sites required suture. A statistically significant decrease in postoperative IOP was found only on day 1 (p<0.05). Mean preoperative (before silicone oil removal) best correct visual acuity (BCVA) was LogMAR 1.39±0.74 and mean postoperative BCVA at the final visit was LogMAR 1.23±0.88 (p<0.05). Mean postoperative follow-up was 7.2±6.2 months. Postoperative transient hypotony occurred in 23 eyes (IOP < 7 mm-Hg), revitreous hemorrhage occurred in 5 eyes and retinal re-detachment occurred in 7 (5.3%) eyes. Conclusion: Removal of 1000 cSt silicone oil with our new method is effective, safe, easy, and fast.
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    Assessment of ganglion cell complex, macular thickness, and optic disc parameters in keratoconus patients
    (Wolters Kluwer Medknow Publications, 2020) Orman, Gozde; Firat, Penpe Gul; Doganay, Selim; Doganay, Derya
    PURPOSE: Keratoconus (KC) is bilateral noninflammatory corneal disorder characterized by progressive corneal thinning, protrusion, and scarring. The purpose of this study was to evaluate ganglion cell complex(GCC), macula thickness(MT) and optic head disc parameters in keratoconus patients. METHODS: A hospital based prospective clinical case series was performed in Inonu University School of Medicine. 52 eyes of 52 keratoconus patients and 50 eyes of 50 normal patients were enrolled. RESULTS: There is no statistically significant in MT between groups. GCC in nasal superior, temporal superior and temporal inferior 9 mm from macula were found statistically significant decrease in keratoconus group (p<0,05). In optic disc analysis fifth and the eleventh clock-hour quadrants of peripapiller retina nerve fiber layer and cup area ratio were found statistically significant decrease in keratoconic eyes (p<0,05). CONCLUSION: We thought that structural retinal changes seem in keratoconus eyes; keratoconus pathogenesis may affect not only cornea but also retina and optic nerve head.
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    Corneal tattooing for esthetic purposes in patients with corneal opacities
    (Wolters Kluwer Medknow Publications, 2020) Doganay, Derya; Doganay, Selim; Cankaya, Cem
    Purpose: This study evaluated corneal tattooing for esthetic purposes in patients with corneal opacification. Methods: Eight eyes of eight patients were included in the study (four males and four females). Corneal tattooing was achieved by stromal puncture in five patients, femtosecond laser-assisted corneal tattooing in two patients, and femtosecond laser-assisted corneal tattooing and stromal needling (combined procedure) in one patient. In six of the patients, the entire cornea was stained black; in one patient, the center of the cornea (3 mm) was stained black and the periphery was stained dark brown; and in the last patient, the corneal periphery was stained dark brown. Patient satisfaction was evaluated on the first day after surgery and at the last visit as follows: Very satisfied (4), satisfied (3), moderately satisfied (3), and not satisfied (1). Results: The patients ranged in age from 11-80 years. The mean satisfaction score of the patients was 4 and 3.5 on the first postoperative day and at the last visit, respectively. No complication occurred during or after surgery. Conclusion: Corneal tattooing for esthetic purposes was successful in both blind eyes and seeing eyes.
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    Evaluation of corneal biomechanical properties after uneventful standard coaxial phacoemulsification surgery
    (2018) Cankaya, Cem; Ulas, Fatih; Doganay, Derya; Firat, Penpegul; Doganay, Selim
    Aim: This study was designed to investigate the alteration of intraocular pressure measurements and biomechanical properties of the cornea in patients who underwent uneventful standard coaxial phacoemulsification cataract surgery through 2.75 mm corneal main incision with intraocular lens implantation. Material and Methods: 15 eyes of 15 patients admitted to our clinic because of the cataract problems in the study. Corneal hysteresis (CH), corneal resistance factor (CRF) measurements, Goldmann correlated (IOPg), and corneal compensated intraocular pressure (IOPcc) values were recorded by ocular response analyzer (ORA) before and 1 day, 1 week and 1 month after surgery. Results: The mean age of the patients was 64.3 ± 8.06 years. Preoperative mean CH, CRF, IOPg and IOPcc values were 8.23±2.10, 9.33±2.27, 18.54±3.42 and 19.66±3.22, respectively. The mean CH, CRF, IOPg and IOPcc values were 5.50±2.07, 8.69±2.04, 22.29±3.37 and 23.83±3.32, respectively on the first day after the surgery. The mean CH, CRF, IOPg and IOPcc values were 5.25±1.83, 8.29±2.10, 18.86±2.72 and 20.20±3.37, respectively of the first week after the surgery. The mean CH, CRF, IOPg and IOPcc values were 7.88±1.99, 8.37±1.83, 15.81±2.60 and 16.41±2.80, respectively in the first month after the surgery. Conclusion: These results revealed that the biomechanical properties of the cornea may change during the first one month period after uneventful standard coaxial phacoemulsification surgery
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    Pars plana vitrectomy combined with pan-retinal photocoagulation, Ahmed glaucoma valve implantation, and/or phacoemulsification for complicated neovascular glaucoma treatment
    (Consel Brasil Oftalmologia, 2024) Doganay, Derya; Doganay, Selim; Cankaya, Cem
    | Purpose: To present long-term results of pars plana vitrectomy combined with pan-retinal endolaser pho-tocoagulation, Ahmed glaucoma valve implantation, and/or phacoemulsification in patients with complicated neovascular glaucoma. Methods: The study comprised 15 eyes from 15 patients with neovascular glaucoma as a complication of diabetic retinopathy and owing to ischemic central retinal vein occlusion. There was a vitreous hemorrhage n all of the patients. Further-more, 8 of the cases showed varying degrees of hyphema. All subjects received an intravitreal injection of bevacizumab three days before surgery. In 12 phakic patients, phacoemulsification, pars plana vitrectomy, and Ahmed glaucoma valve implantation were performed. Pars plana vitrectomy and Ahmed glaucoma valve implantation were performed in 3 pseudophakic patients. Perioperative and postoperative complications, intraocular pressure values, and best-corrected visual acuity scores were also recorded. Results: The mean follow-up was 24.4 +/- 14.56 months. The mean preoperative intraocular pressure was 50.06 +/- 7.6 mmHg. At 1 day, 7 days, and 1-, 3-, 6-, 12-month, and last visit following surgery, the mean intraocular pressure was 11.06 +/- 8.22, 12.66 +/- 7.27, 13.8 +/- 7.73, 18.64 +/- 7.05, 19.28 +/- 4.61, 16.28 +/- 1.68, and 16.92 +/- 2.12 mmHg, respectively (p=0.001 for every follow-up visit). The mean visual acuity on the most recent appointment was 1.18 +/- 0.42 logMar (p=0.001 for each subsequent visit). As postoperative early complications, varying degrees of hyphema and fibrin reactions were recorded. During follow-up, one patient developed phthisis bulbi. In 4 cases, Ahmed glaucoma valve revision surgery was required. Conclusions: In patients with complicated neovascular glaucoma, combined surgical procedures are safe, effective, and preferable both in terms of controlling high intraocular pressure and providing reasonable visual abilities.
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    Surgical removal of subfoveal perfluorocarbon liquid using combined 41 gauge needle and active aspiration under perfluorocarbon liquid
    (2021) Doganay, Derya; Doganay, Selim; Cankaya, Cem
    A 57 years old patient underwent uneventfully 23-gauge pars plana vitrectomy (PPV) surgery containing perfluorocarbon liquid (PFCL) injection, endolaser retinopexy, fluid-air exchange, and silicone-oil implantation due to rhegmatogenous retinal detachment. The patient has admitted to the clinic due to decreased visual acuity caused by subfoveal retained PFCL detected with optical coherence tomography (OCT) 4 weeks after surgery. The patient underwent a reoperation to remove the residual subfoveal PFCL partially with a new technique.
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    Surgical removal of subfoveal perfluorocarbon liquid usingcombined 41 gauge needle and active aspiration underperfluorocarbon liquid
    (2021) Doganay, Selim; Doganay, Derya; Görgel, Ahmet
    A 57 years old patient underwent uneventfully 23-gauge pars plana vitrectomy (PPV) surgery containing perfluorocarbon liquid (PFCL) injection, endolaser retinopexy, fluid-air exchange, and silicone-oil implantation due to rhegmatogenous retinal detachment. The patient has admitted to the clinic due to decreased visual acuity caused by subfoveal retained PFCL detected with optical coherence tomography (OCT) 4 weeks after surgery. The patient underwent a reoperation to remove the residual subfoveal PFCL partially with a new technique.