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ÇAM, FURKAN

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    PublicationOpen Access
    Choroidal vascularity index as an activity criterion and a treatment response measure in chronic central serous chorioretinopathy
    (2023-01-01) ŞAHİN, ÖZLEM; SEVİK, MEHMET ORKUN; ÇAM, FURKAN; DERİCİOĞLU, VOLKAN; SEVİK M. O., Aykut A., ÇAM F., DERİCİOĞLU V., ŞAHİN Ö.
    Purpose: This study aimed to evaluate the choroidal vascularity index (CVI) as an activity criterion in chronic central serous chorioretinopathy (CSC) and as a measure of treatment response after full-dose-full-fluence photodynamic therapy (fd-ff-PDT). Methods: This fellow-eye-controlled, retrospective cohort study included 23 patients with unilateral chronic CSC treated with fd-ff-PDT (6 mg/m2; 50 μcm2; 83 s). Subfoveal choroidal thickness (SFCT, μm) and CVI (%) of the affected and fellow eyes at baseline as well as at 1, 3 and 6 months after fd-ff-PDT were compared. Results: The patients\" mean age was 43.4 ± 7.3 years, and 18 (78.3%) were male. CVI was comparable between the affected and fellow eyes at baseline (66.09 ± 1.56 vs. 65.84 ± 1.57, p = 0.59). However, it became significantly lower in the affected eyes 1 (64.45 ± 1.68 vs. 65.87 ± 1.19, p = 0.002), 3 (64.21 ± 2.08 vs. 65.71 ± 1.59, p = 0.009) and 6 (64.47 ± 2.19 vs. 65.62 ± 1.52, p = 0.045) months after fd-ff-PDT. The mean SFCT and the mean CVI were significantly decreased in the affected eyes at all follow-up visits compared with baseline after fd-ff-PDT (p < 0.001). Conclusion: At baseline, CVI was comparable between affected and fellow eyes. Therefore, its use as an activity criterion in chronic CSC patients is questionable. However, it was significantly decreased in fd-ff-PDT-treated eyes, supporting its role as a measure of treatment response in chronic CSC.
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    PublicationOpen Access
    Untitled reply
    (2022-07-01) SEVİK, MEHMET ORKUN; ÇAM, FURKAN; ŞAHİN, ÖZLEM; DERİCİOĞLU, VOLKAN; SEVİK M. O., ÇAM F., Aykut A., DERİCİOĞLU V., ŞAHİN Ö.
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    PublicationOpen Access
    Spectral Domain Optical Coherence Tomography Findings of Subacute Sclerosing Panencephalitis Presenting with Macular Necrotizing Retinitis: A Case Report
    (2022-09-01) ÇAM, FURKAN; DERİCİOĞLU, VOLKAN; ÇELİKER ATABERK, HANDE; ÇAM F., DERİCİOĞLU V., ÇELİKER H.
    Purpose: To report the fundus photographs and spectral domain optical coherence tomography (SD-OCT) findings of a patient with subacute sclerosing panencephalitis (SSPE) presenting merely with ocular symptoms. Case report: A 20-year-old patient presented with sudden loss of vision in the left eye (LE). Fundus photograph showed a yellow lesion in the macula and SD-OCT showed increased reflectivity of the inner retinal layers. Disorganization of the necrotizing retinal layers in the LE gradually progressed to the atrophic retina. Then, visual complaints began in the right eye (RE) accompanied by neurological symptoms. SD-OCT revealed the inner and outer plexiform layers edema and interruption of the ellipsoid zone in RE. Fundus photographs showed macular atrophy for both eyes on the day patient died. Conclusion: This case report demonstrates the SD-OCT findings of SSPE retinitis with close follow-up from the acute retinitis to the total atrophic macula. These unique findings may be considered as characteristical for the diagnosis.
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    Choroidal vascularity index changes during the Valsalva manoeuvre in healthy volunteers
    (2021) ÇAM, FURKAN; Sevik, Mehmet Orkun; Çam, Furkan; Aykut, Aslan; Dericioğlu, Volkan; Şahin, Özlem
    PURPOSE: To evaluate the effects of the Valsalva manoeuvre (VM) on the choroidal vascularity index (CVI) in healthy volunteers. METHODS: This prospective, cross-sectional study included 60 eyes of 30 healthy volunteers. Enhanced depth imaging-optical coherence tomography scans of both eyes involving the fovea were taken, and a 1500 μm subfoveal choroidal area was selected for image binarization with open-access Fiji software. The binarized image was segmented into the stromal area (SA) and luminal area (LA), and CVI was calculated as the ratio (%) of LA to the total choroidal area (TCA). CVI, subfoveal choroidal thickness (SFCT), IOP, systolic and diastolic blood pressure were evaluated at rest and during the VM. RESULTS: During the VM, a mean ± standard deviation increase in LA (0.02 ± 0.05 mm2 , p < 0.001) and CVI (1.72 ± 2.83%, p < 0.001) was observed, whereas SA (-0.02 ± 0.05 mm2 , p < 0.001) decreased. There was no significant change in TCA (0.00 ± 0.03 mm2 , p = 0.55) or SFCT (1.05 ± 10.92 μm, p = 0.46). There was a moderate positive correlation between the spherical equivalent refractive error (SE) and SFCT both at rest and during VM (r58  = 0.49, p < 0.0005 and r58  = 0.49, p < 0.0005, respectively). However, there was no significant correlation between SE and CVI either at rest or during VM (p = 0.11 and 0.06, respectively). In a multiple linear regression analysis, CVI was only associated with SFCT; however, SFCT was also associated with SE, both at rest and during VM (p < 0.001). CONCLUSION: Valsalva manoeuvre increases CVI by choroidal vascular dilation as demonstrated by an increase in LA and a decrease in SA. Researchers should be careful about unintentional VM during examinations.