Sinan Albayrak

Quantitative Analysis of Retinal Microvascular Structure and Correlation with Ocular Parameters: A Normative Database of Pediatric OCT Angiography

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Purpose To analyze the vascular structure of the healthy pediatric population using optical coherence tomography angiography (OCTA), and to investigate its relationship with ocular parameters. Materials and Method This cross-sectional, prospective study included 142 eyes of 71 healthy subjects aged 8-18 years. All patients underwent a complete ocular assessment, biometric evaluation and OCTA analysis. Anterior chamber depth, axial length, corneal thickness values were also reported and their relationship with OCTA measurements was evaluated. Results There was no statistical difference between girls and boys in terms of demographic characteristics (p>0.05). Neither vascular density in the deep and superficial capillary plexus nor FAZ area was significantly related to the ocular parameters or age of any patient in the study. Conclusions Despite the relatively small number of participants, this study may represent normative data for the Turkish pediatric population. It was al...

Early-term Optical Coherence Tomography Angiographic Findings in Pediatric Patients Infected with COVID-19

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Purpose: The aim of this study was to investigate possible vascular changes in pediatric patients infected with COVID-19 and to compare these with an age-matched control group. Methods: All patients underwent an ocular assessment and optical coherence tomography angiography examination. Two vascular networks were analyzed as the superficial and deep regions. Results: Evaluation was made of 40 eyes of 20 patients who had recently recovered from COVID infection and 80 eyes of 40 healthy individuals. The DCP-VD values of the COVID group were significantly lower than the control group in most quadrants. The FAZ PERIM and FAZ area values in the COVID patients were higher than the control group, but not statistically significant (p>.05). Conclusion: Pediatric cases of COVID-19 may differ from adults based on structural and immune response differences, and that OCTA can be a noninvasive guide for analysis of the end-organ effects of pediatric COVID disease. ( Read Full Article )

Optical Coherence Tomography-Signal Strength Index following Trifocal and Monofocal Intraocular Lens Implantation

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Purpose To evaluate the influence of trifocal and monofocal intraocular lens implantation on the optical coherence tomography-signal strength index values obtained during macular and peripapillary scanning. Method Study group included 60 eyes of 60 patients with intraocular lens (Acriva BB UD 613 monofocal in 30 eyes and Acriva Trinova UD trifocal in 30 eyes) implantation after uneventful phacoemulsification. Thirty eyes of 30 healthy subjects without any intraocular surgery were selected as the control group. Eyes with best corrected visual acuity less than 20/20 due to any media opacity, high refractive errors excluded. Macular and retinal nerve fiber layer scans were generated by optical coherence tomography after pupillary dilation. Intergroup comparisons of signal strength index values of the macular and peripapillary scans were performed between eyes implanted with two different intraocular lenses and control group. Results The mean signal strength index of the peripapillary a...

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