S Kaynak

Dokuz Eylul University, İzmir, Izmir, Turkey

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Publications (22)31.43 Total impact

  • Article: Phacoemulsification and intraocular lens implantation in eyes with long axial length.
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    ABSTRACT: We evaluated the results of phacoemulsification and intraocular lens implantation in 414 eyes with long axial length and classified them according to axial length (AL): Group A: AL: 25-28 mm, Group B: AL >28 mm. Intraoperative maneuvers, pre- and postoperative photocoagulation for predisposing retinal lesions and retinal detachment rates were significantly higher in Group B than Group A. Eyes with an axial length over 28 mm are prone to more problems when compared to those with an axial length between 25 and 28 mm.
    Annals of Ophthalmology 09/2007; 39(3):217-21. · 0.16 Impact Factor
  • Article: Phacoemulsificatıon and Intraocular Lens Implantation in Eyes with Long Axial Length
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    ABSTRACT: We evaluated the results of phacoemulsification and intraocular lens implantation in 414 eyes with long axial length and classified them according to axial length (AL): Group A: AL: 25–28mm, Group B: AL >28mm. Intraoperative maneuvers, pre- and postoperative photocoagulation for predisposing retinal lesions and retinal detachment rates were significantly higher in Group B than Group A. Eyes with an axial length over 28mm are prone to more problems when compared to those with an axial length between 25 and 28mm.
    Annals of Ophthalmology 06/2007; 39(3):217-221. · 0.16 Impact Factor
  • Article: Unilateral Purtscher-like retinopathy after weight-lifting.
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    ABSTRACT: To report a case of Purtscher-like retinopathy after weightlifting. A 17-year-old man presented with a sudden visual loss in his left eye after weightlifting two weeks ago. Fundus examination of the left eye showed cotton-wool spots and scattered retinal hemorrhages in the posterior pole. Fluorescein angiography and indocyanine green angiography with a scanning laser ophthalmoscope were performed. Angiography showed hypofluorescent areas adjacent to the optic disc and in the posterior pole and partial filling insufficiency in the inferior and inferotemporal branch retinal veins. Complete venous filling was noted in late phases of angiography. The pathogenesis of weightlifting suggests the Purtscher-like changes as a result of Valsalva maneuver in our case. To our knowledge, this is the first reported case of Purtscher-like retinopathy associated with weightlifting.
    European journal of ophthalmology 06/2003; 13(4):395-7. · 0.96 Impact Factor
  • Article: Management of free floating iris cysts in the anterior chamber: a case report.
    H F Oner, S Kaynak, N Koçak, G Cingil
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    ABSTRACT: To present a case with free iris cysts in the anterior chamber and its management with YAG laser. A 14-year-old boy presenting with the complaint of seeing a small ball-like moving mass in his left eye. Slit-lamp examination revealed a pair of free-floating iris cysts located inferiorly in the anterior chamber. After YAG laser application both the cysts collapsed. This is the first report of a case with multiple free iris cysts in the anterior chamber. Considering the possibility of endothelial damage in the long-term, it is worth noting the favorable response to YAG laser treatment.
    European journal of ophthalmology 04/2003; 13(2):212-4. · 0.96 Impact Factor
  • Article: Tilt and decentration after primary and secondary transsclerally sutured posterior chamber intraocular lens implantation.
    A Durak, H F Oner, N Koçak, S Kaynak
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    ABSTRACT: To evaluate tilt and decentration after primary and secondary implantation of transsclerally sutured posterior chamber intraocular lenses (PC IOLs). Dokuz Eylül University Medical School, Department of Ophthalmology, Izmir, Turkey. Fifty-six consecutive eyes of 53 patients who had implantation of transsclerally sutured PC IOLs were prospectively included in the study. Intraocular lens tilt and decentration after primary (14 eyes) and secondary (42 eyes) implantation were compared quantitatively using Purkinje images. The mean IOL tilt was 6.09 degrees +/- 3.80 (SD) in all eyes, 5.71 +/- 3.41 degrees in the primary implantation group, and 6.22 +/- 3.94 degrees in the secondary implantation group. The mean IOL decentration was 0.67 +/- 0.43 mm (range 0 to 2.5 mm), 0.59 +/- 0.38 mm, and 0.69 +/- 0.45 mm, respectively. There were no statistically significant differences between the primary and secondary implantation groups in decentration or tilt. Decentration greater than 1.0 mm was present in 7 eyes (16.7%) after secondary implantation and in 1 eye (7.1%) after primary implantation. Tilting of more than 10 degrees was present in 7 eyes (16.7%) and 2 eyes (14.2%), respectively. There were no statistically significant differences between the 2 groups in decentration greater than 1.0 mm (chi square = 0.194, P =.834) or in tilting greater than 10 degrees (chi square = 0.834, P =.659). Clinically significant IOL tilt or decentration was rare after transscleral implantation. There were no differences in tilt or decentration between primary and secondary implantation.
    Journal of Cataract [?] Refractive Surgery 03/2001; 27(2):227-32. · 2.26 Impact Factor
  • Article: Retinal breaks and rhegmatogenous retinal detachment in association with branch retinal vein occlusion.
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    ABSTRACT: To report the incidence and clinical characteristics of retinal breaks and/or rhegmatogenous retinal detachment (RRD) in patients with branch retinal vein occlusion (BRVO). We reviewed the clinical records of 230 eyes of 214 patients with BRVO and identified eyes with retinal breaks and/or RRD. Patients had at least 6 months of follow-up. Seven of 230 eyes (3%) had retinal breaks and 3 eyes (1.3%) had RRD. One of the eyes with RRD had subclinical retinal detachment. All 7 eyes had ischemic disease documented by fluorescein angiography. Two of 7 eyes had concurrent retinal neovascularization. Four eyes with breaks, but without RRD, and the eye with subclinical RRD were managed by argon green laser. Two eyes with RRD were managed successfully with scleral buckling surgery and postoperative supplemental argon green laser. The mean follow-up period was 14.8 +/- 8.3 months. Patients with BRVO should be monitored closely for possible retinal break formation and RRD development.
    Ophthalmic surgery and lasers 05/1999; 30(4):285-8.
  • Article: Pars plana vitrectomy with pars plana tube implantation in eyes with intractable glaucoma.
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    ABSTRACT: Intractable glaucoma is glaucoma resistant to medical therapy and conventional surgical procedures. In this study, a planned surgical technique is discussed for controlling the increased intraocular pressure in selected cases with intractable glaucoma. Total pars plana vitrectomy with pars plana tube implantation was performed in 17 eyes of 17 cases with intractable glaucoma. Patients with neovascular glaucoma were not included in this study. The mean age of these patients (seven men, 10 women) was 44.6 (SD 22.1) years and mean follow up period was 30.3 (15.5) months (range 4-71). Drainage implants with a disc were used in 16 cases, whereas, a tube with scleral buckle (Schocket surgery) was preferred in one case. An intraocular pressure below or equal to 20 mm Hg without any adjunctive medication or with only one type of antiglaucomatous drop was considered as an adequate operative outcome. 16 out of 17 eyes maintained adequate pressure control. Only three out of these 16 eyes required prophylactic antiglaucomatous medications. One patient underwent reoperation for pressure control. The most severe complications observed postoperatively were intravitreal haemorrhage (one case), choroidal detachment (one case), implant failure (one case), total retinal detachment (two cases), and corneal endothelial decompensation (five cases). Pars plana placement of drainage tube following pars plana vitrectomy should be considered as an alternative method for controlling increased intraocular pressures in selected patients with intractable glaucoma.
    British Journal of Ophthalmology 01/1999; 82(12):1377-82. · 2.90 Impact Factor
  • Article: Magnetic resonance imaging in the evaluation of eyes treated with silicone oil.
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    ABSTRACT: To evaluate the sensitivity of magnetic resonance imaging (MRI) in detecting retinal detachment (RD) in eyes filled with silicone oil, and to determine the MRI characteristics of silicone oil in vivo. Seven eyes of seven patients with RD and eight eyes of eight patients without RD after silicone oil surgery were included in the study. All of the patients had clear media. MRI was performed in these patients. The results of ophthalmic examinations were compared with MRI findings. MRI detected six of the seven detached retinas. The multiplanar imaging capability of MRI helped in showing the RDs in various locations. The chemical shift artifact exaggerated the retinal thickness and made the detached retina visible. Fat suppressed images showed the silicone oil-corneal contact clearly. MRI is an effective technique for demonstrating RD in eyes filled with silicone oil and can be used successfully in eyes with opaque media.
    Ophthalmic surgery and lasers 01/1997; 27(12):1019-23.
  • Article: Axial length and hyperopia in eyes with retinal vein occlusions.
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    ABSTRACT: We performed a prospective study in order to elucidate the predisposing role of axial length and hyperopia in retinal vein occlusions. The study group comprised 39 patients with unilateral central retinal vein occlusion (CRVO), 50 patients with unilateral branch retinal vein occlusion (BRVO), 13 patients with unilateral hemispheric retinal vein occlusion (HRVO) and 45 control eyes. The axial length of affected eyes was compared to fellow eyes and control eyes in each subgroup of patients with retinal vein occlusion. No statistical difference was noted for any of the subgroups (p > 0.05). Hyperopia was detected in 12 of 39 eyes (31%) with CRVO, 14 of 50 eyes (28%) with BRVO, 4 of 13 eyes (31%) with HRVO and 15 of 45 eyes (33%) in the control group. No statistically significant difference was discovered (p > 0.05). In the light of our study, we believe that axial length and hyperopia may not be risk factors in retinal vein occlusions, in contrast to common belief.
    International Ophthalmology 12/1996; 21(4):209-11.
  • Article: Bilateral duplication of the optic canals.
    A Orhan Mağden, S Kaynak
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    ABSTRACT: During an autopsy survey of 369 human skulls, one with bilateral (0.27%) and one with unilateral (0.27%) duplication of the optic canal were reported. The anatomical findings in case of this rare anomaly are presented.
    Annals of Anatomy - Anatomischer Anzeiger 02/1996; 178(1):61-4. · 1.86 Impact Factor
  • Article: Extraocular muscle imbalance after scleral buckling.
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    ABSTRACT: Postoperative muscle imbalance was prospectively evaluated in 44 patients who underwent conventional scleral buckling operations. Strabismus was present in 27 of 44 patients (61%). Heterotropia resolved spontaneously during the first six postoperative months in nine of 27 patients (33%). Diplopia persisted in six patients (13.6%) and limitation of ductions occurred in 22 of 44 patients (50%). The risk of developing postoperative strabismus was 2.5 times longer if an implant was placed under a rectus muscle. Otherwise, presence, degree, and direction of the duction deficits did not correlate with placement of a local implant under the corresponding rectus muscles or their antagonists. Reoperation, preoperative detachment of macula and size of the local implant were not statistically correlated with extraocular muscle imbalance. We believe that decrease in postoperative swelling and increase in visual acuity that allows phoria adaptation are the main causes of spontaneous resolution.
    Strabismus 01/1996; 4(2):69-75.
  • Article: Intestinal Tl-201 activity in the thorax mimicking lung metastasis of malignant melanoma.
    H Durak, I Durak, T Berk, O Kut, S Kaynak
    Clinical Nuclear Medicine 08/1995; 20(7):650-1. · 3.67 Impact Factor
  • Article: Thallium-201 uptake in the orbits.
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    ABSTRACT: Thallium-201 uptake patterns in the orbits are not widely known. Diffuse, bilateral orbital localization of TI-201 chloride may be an incidental finding because of orbital muscle or other soft tissue uptake. Differences in orbital blood flow and soft tissue mass may be the cause of the varying uptake intensities in most cases. Focal uptakes, even when bilateral, may indicate specific pathology and should be investigated. Sample cases are presented.
    Clinical Nuclear Medicine 07/1995; 20(6):531-3. · 3.67 Impact Factor
  • Article: Somatostatin receptors in the orbits.
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    ABSTRACT: In-111 pentetreotide has been recommended for the detection of somatostatin receptor (SSR) positive tumors. Sites with increased numbers of activated lymphocytes may also show In-111 pentetreotide with Graves' ophthalmopathy (GO) compared to various other orbital disorders. Five patients with GO, three patients with necrotizing scleritis, and two patients with orbital pseudotumor were imaged at 4 hours, 24 hours, and 48 hours after injection of In-111 pentetreotide. Although planar images did not show considerable uptake, SPECT slices showed marked and persistent uptake in the orbits unilaterally in one patient, and bilaterally in three patients with GO. There was no significant correlation between the In-111 pentetreotide activity and the degree of opthalmopathy determined by Werner's classification. Pseudotumors also showed positive uptake. Early uptake was present in one patient with necrotizing scleritis because of Wegener's granulomatosis, and was completely diminished at 24 hours. Octreotide treatment in three patients with GO did not cause any clinical improvement. Although the presence of SSR, either on the infiltrated lymphocytes or on fibroblasts, implies that octreotide treatment for GO can be considered, the results are not encouraging. Nonspecific binding might be present when uptake patterns of orbits and persistence of activity during octreotide treatment are considered.
    Clinical Nuclear Medicine 04/1995; 20(3):237-42. · 3.67 Impact Factor
  • Article: Semi-voluntary luxation of the globe.
    Acta ophthalmologica 11/1994; 72(5):652-3. · 2.44 Impact Factor
  • Article: Nd:YAG laser posterior hyaloidotomy in subhyaloid hemorrhage.
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    ABSTRACT: Subhyaloid hemorrhage is usually a benign condition that generally improves spontaneously and rarely causes visual loss. However, because subhyaloid hemorrhage may be associated with permanent macular changes before it spontaneously resolves, posterior Nd:YAG hyaloidotomy may be indicated in selected patients. We performed Q-switched Nd:YAG laser posterior hyaloidotomy via the transcorneal route in two cases of subhyaloid hemorrhage. The hemorrhage instantaneously drained into the vitreous cavity, resulting in a dramatic increase in visual acuity.
    Ophthalmic surgery 08/1994; 25(7):474-6.
  • Article: Restrictive myopic myopathy: computed tomography, magnetic resonance imaging, echography, and histological findings.
    S Kaynak, I Durak, D Ozaksoy, T Canda
    British Journal of Ophthalmology 06/1994; 78(5):414-5. · 2.90 Impact Factor
  • Article: Improving estimation of corneal refractive power by measuring the posterior curvature of the cornea.
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    ABSTRACT: We developed a formula to measure the posterior curvature of the cornea. In our study, real corneal power in 51 eyes was calculated by using anterior and posterior curvatures and corneal thickness. The corneal refractive index was found to be a variable value between 1.3243 and 1.3339 (mean 1.3304 +/- 0.0003).
    Journal of Cataract [?] Refractive Surgery 04/1994; 20(2):129-31. · 2.26 Impact Factor
  • Article: Magnetic resonance imaging and computed tomography in the detection and localization of intraocular foreign bodies.
    U Gunenc, A Maden, S Kaynak, T Pirnar
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    ABSTRACT: In this experimental study, various foreign bodies were inserted into fresh bovine eyes, in different localizations. Twenty-one magnetic and non-magnetic foreign bodies, dimensions of which varied from 1.5 x 1.5 x 2 mm to 3.5 x 6 x 7 mm, were tried to detect by computed tomography (CT) and magnetic resonance imaging (MRI) scanning. In addition, further dissections were applied to check the ocular damage attributable to movement of the foreign bodies. Ferromagnetic foreign bodies have been shown to move in the eye and the risk of torsional forces being applied to the ferromagnetic foreign body seemed to cause intraocular complications during MRI scanning. All of the foreign bodies that were implanted in bovine eyes were recognized on CT scanning, except intraocular lenses. As a general rule, metallic foreign bodies produced beam-hardening artifacts, but these artifacts did not cause any problem in detecting the localizations of foreign bodies.
    Documenta Ophthalmologica 02/1992; 81(4):369-78. · 2.11 Impact Factor
  • Article: Preserved human amniotic membrane transplantation in the treatment of primary pterygium.
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    ABSTRACT: To assess the outcome of simple excision with preserved human amniotic membrane transplantation in the treatment of primary pterygium. A total of 59 eyes with primary pterygium underwent surgical excision. In Group 1, 28 eyes were treated with simple excision and preserved human amniotic membrane transplantation. In Group 2, 31 eyes were treated with bare sclera excision. These two groups were compared in recurrence, final appearance of the operation site, and complications. Patients were followed for at least 10 months. During a mean follow up of 14.9 months, we observed 3 (10.7%) recurrences in Group 1 and 20 (38.7%) recurrences in Group 2 (P:0.03). In Group 1, 20 (71.4%) eyes and 14 (45.2%) eyes in Group 2 had a satisfactory final operation site appearance (P:0.041). No serious complication was observed in both groups. Simple excision and preserved human amniotic membrane transplantation appears to be a safe and effective way of treating primary pterygium because of the lack of serious complications and a relatively low rate of recurrence.
    Ophthalmic surgery and lasers 32(6):464-9.