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Now showing 1 - 4 of 4
  • Publication
    Metadata only
    The effect of platelet-rich fibrin on wound healing following strabismus surgery
    Purpose To investigate the effect of platelet-rich fibrin (PRF) on post-operative wound healing following strabismus surgery in a rabbit model. Methods Nine New Zealand white rabbits were involved in the study. One of these nine rabbits was kept in control without having any operation. Both eyes of eight rabbits underwent superior rectus muscle (SRM) resection. After resection of SRM, PRF was applied to SRM of the right eyes. In the left eye, SRM was not wrapped with PRF and served as a control. The rabbits were sacrificed and enucleated 6 weeks after the surgery. Inflammation and vascular proliferation were assessed by staining with haematoxylin-eosin. Scar and fibrosis were examined by the Masson trichrome staining. Immunohistochemical staining was performed for a vascular endothelial growth factor (VEGF) and alpha-smooth muscle actin (alpha-SMA). Results There was no significant difference in terms of inflammation (p = 0.535), vascularization (p = 0.602), and fibrosis (p = 0.745) between the eyes. Immunohistochemical staining for VEGF demonstrated no significant difference (p = 0.745). However, significant staining for alpha-SMA was detected in PRF-treated eyes compared with control eyes (p = 0.037). Conclusion Consistent with the hypothesis that PRF facilitates wound healing as a biocatalyst, there was only a significant difference for alpha-SMA related to myofibroblast activity which is important for wound remodelling. Future comprehensive studies are needed to extend these results.
  • Publication
    Open Access
    Adie-Holmes syndrome associated with COVID-19 infection: A case report
    (2021-03-01T00:00:00Z) Tutar, Nurhan Kaya; Kale, Nilufer; TUĞCU, Betül; TUĞCU, BETÜL
    With increasing experience, it has been suggested that the SARS-CoV-2 virus has a neurotropic effect. Here, we present a case of a tonic pupil who developed after COVID-19 infection. A 36-year-old woman presented with progressive photophobia and blurred vision. On neurological examination, loss of deep tendon reflexes accompanying a tonic pupil was detected and brain MR imaging was normal. With this case, we aimed to describe a rare pattern of neurological involvement caused by the possible SARS-CoV-2 virus.
  • Publication
    Open Access
    Evaluation of amblyopic eyes with optical coherence tomography angiography and electrophysiological tests
    (2021-01-01T00:00:00Z) Hamurcu, Mualla; EKİNCİ, CANSU; Koca, Semra; TUĞCU, Betül; EKİNCİ, CANSU; TUĞCU, BETÜL
    Purpose: To investigate the structural and functional changes of the retina and optic nerve in amblyopia. Methods: Eighteen patients with unilateral anisometropic amblyopia and 27 age-matched healthy controls were involved in this study. All patients underwent optical coherence tomography angiography (OCTA), pattern visual evoked potential (pVEP), and flash electroretinogram (fERG). Results: There was no statistically significant difference in terms of the fovea] avascular zone (FAZ), perifoveal superficial density, whole superficial density, parafoveal deep density, perifoveal deep density among the eyes (P > 0 0.05). Significant differences were found only in superficial capillary plexus (SCP) vessel density in whole (P = 0.029) and parafoveal (P = 0.008) image. In electrophysiological tests, while VEP latencies of the amblyopic eyes increased compared to nonamblyopic eyes and controls (P = 0.027), VEP amplitudes decreased in amblyopic and nonamblyopic eyes compared to controls (P = 0.01), amplitudes of the rod (P = 0.027) and cones (P < 0.001) also decreased in amblyopic eyes compared to nonamblyopic and healthy eyes. When we assessed the correlation between the parameters of OCTA and electrophysiological test, only a significant correlation was found between parafoveal SCP vessel density and VEP amplitudes (r = 0.341). Conclusion: We found a significant decrease only in SCP vessel density of the OCTA parameters in amblyopic eyes compared to healthy eyes. We detected a significant relationship between parafoveal SCP vessel density and VEP parameters, which might be associated with the underlying pathophysiology of the amblyopia.
  • Publication
    Open Access
    Management of Ophthalmic Complications Secondary to Functional Endoscopic Sinus Surgery
    (2015-04-01T00:00:00Z) TUĞCU, Betül; Araz-Ersan, Bilge; Inci, Ercan; Gulkilik, Gokhan; TUĞCU, BETÜL
    Orbital complications of functional endoscopic sinus surgery (FESS) may cause irreversible damage to the orbital structures, including optic nerve, extraocular muscles, and lacrimal drainage system. The clinical diagnosis and management of these patients may be extremely difficult because of the complexity and severity of the injuries. We describe a patient with ocular motility disturbances, anisocoria, and optic neuropathy in the right eye secondary to FESS. Early medical and surgical intervention resulted in symptom resolution.