Browsing by Author "Savasan, Mesut"

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Phototoxic Maculopathy Due To Extreme Usage of Infrared Illuminator-Assembled Night-Vision Handheld Scope
(Sage Publications Ltd, 2020) Ozer, Muhammet Derda; Batur, Muhammed; Seven, Erbil; Tekin, Serek; Savasan, Mesut
Night-vision handheld scopes are of wide use in military operations at dark conditions. In some cases in the battlefield, as in our case report, if there is no light coming from any source (neither from Moon nor from Stars), infrared light-emitting diode illumination can be coupled with night-vision goggles. Reflected illumination from the target is mostly blue filtered through the night-vision goggles objective lens. Retinal damage induced by unfiltered blue light and visible light has been previously reported. We described a phototoxic maculopathy induced by night-vision handheld scope assembled with infrared light-emitting diode illuminator in two soldiers who are on duty at nights for nearly two-thirds of the last year. The phototoxic maculopathy can represent with typical optical coherence tomography findings such as intraretinal hyperreflective accumulation particularly located on the surface of outer retinal segments defect or presumably in the vicinity of the light passageway. Here, we presented a unique factor causing phototoxic maculopathy.
The Profi Le and the Treatment Outcomes of Pediatric\rmicrobial Keratitis in a Tertiary Referral Center
(2021) Seven, Erbil; Batur, Muhammed; Tekın, Serek; Ozer, Muhammet Derda; Savasan, Mesut
Purpose: To evaluate the predisposing factors, clinical and microbiologic features, and treatment results of pediatric microbial keratitis.\rMaterials and Methods: The medical records of 34 eyes with bacterial keratitis in 34 children were retrospectively reviewed. Demographic\rfeatures, predisposing factors, clinical features of the infi ltration, bacteriologic culture results, and treatment outcomes were analyzed.\rResults: The male to female ratio was 1.8:1. The mean age at presentation was 7.3±5.5 years (0.5-16 years). The most common detectable\rpredisposing factor was trauma (38.2%). Four (25%) of 16 cases in which corneal swaps were obtained for pathogen analyses, were culture\rpositive. Coagulase-negative Staphylococcus was observed in three cases, and Bacillus Cereus was found in one case. The fi nal mean bestcorrected\rvisual acuity (BCVA) was increased signifi cantly compared to the initial BCVA (Z=-2.9, p=0.004). The risk factors leading to poor\rvisual outcomes were initial poor BCVA, deep stromal infi ltration, and hypopyon existence at presentation (R=-0.60 and p=0.01, R=-0.55 and\rp=0.02, R=0.80 and p<0.001, respectively).\rConclusion: The most common identifi able risk factor for childhood microbial keratitis was corneal trauma. The most common bacteria\risolated were coagulase-negative Staphylococcus. Initial poor BCVA, deep stromal infi ltration, and hypopyon existence at presentation were\rpredictive for poor visual outcome. Early diagnosis, and intensive drug therapy, may effectively improve the prognosis of pediatric microbial\rkeratitis.