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    Differences in Choroidal Vascularity Index Between Migraine Patients in the Attack-free Period and Normal Individuals
    (Gazi Eye Foundation, 2023) Sezer, T.; Ayaslı, A.A.H.; Meydan, B.
    Purpose: Migraine is a neurovascular disorder characterized by recurrent headaches. The relationship between migraine disease and the choroid, has been examined in an attempt to elucidate the underlying pathophysiological mechanisms. This study evaluated CT (choroidal thickness) and choroidal vascularity index (CVI) in chronic migraine patients. Materials and Methods: In this prospective study, we compared CT and CVI values of 36 chronic migraine patients (30 women and 6 men) during an attack-free period with those of 36 healthy individuals (30 women and 6 men) with no systemic or ocular disease, including headache. All patients underwent a detailed eye examination. Migraine patients were grouped as those with and without aura and were asked to rate their headache severity on visual analog scale (VAS; range 1-10) and estimate their monthly migraine frequency. Results: The mean subfoveal CT (SFCT) was 300.52 ± 88.30 µm in the migraine group and 262.85 ± 70.68 µm in the control group. The mean CVI was 71.8% ± 6.2% in the migraine group and 70.7% ± 5.3% in the control group. SFCT and CVI did not differ significantly between the migraine and control groups (p>0.05). VAS pain score was 8.17 ± 0.33 in the migraine group and was not correlated with SFCT (r=0, p=0.998) or CVI (r=-0.06, p=0.731). The monthly migraine frequency was 5.60 ± 3.60 and was not correlated with SFCT (r=-0.17, p=0.328) or CVI (r=-0.06, p=0.731). Conclusion: CT and CVI showed no significant differences from controls in chronic migraine patients during an attack-free period. © 2023 Gazi Eye Foundation. All rights reserved.
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    The effect of different blood groups on visual evoked potentials
    (Publishing Office of the University of Rzeszow, 2023) Eski, M.T.; Yabalak, A.; Şahan, H.; Ayaslı, A.A.H.; Sezer, T.
    Introduction and aim. Purpose of the study is to determine whether it is required to use different standards when evaluating visual evoked potential (VEP) measurements of healthy individuals with different blood groups. Material and methods. The study consisted of healthy individuals with different blood groups who have applied to the ophthalmology and neurology outpatient clinic of Düzce University Medical Faculty from January to December 2022. The patients went through detailed ophthalmologic examination and VEP test and only the ones with normal results were included to the study. Results. The study consisted of 119 individuals, with a blood group distribution of 30 A, 29 B, 30 AB and 30 O. VEP latency and amplitude changes were compared and no significant difference was observed within 4 groups in terms of P100 and N70 latency and amplitudes. There was N70 latency prolongation in Rh- group and this difference was found to be statistically significant (p=0.009). Rh+ group was found to be high in terms of P100 amplitudes and this was considered statistically significant (both p=0.023). Conclusion. There was no statistically significant difference in the VEP parameters of the individuals with the ABO blood groups hence same VEP normal values can be used for ABO blood groups. © 2023 Authors. All rights reserved.