Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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Subject: search.filters.subject.Contrast sensitivity

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    Visual Outcomes at 12 Months in Patients Following Implantation of a Diffractive Multifocal Intraocular
    (2015) Baykara, Mehmet; Akova, Yonca Aydin; Arslan, Osman Sevki; Cinhuseyinoglu, Necdet; Takmaz, Tamer; Gucukoglu, Ahmet; Usta, Yildirim Beyazit; 25825014
    Introduction: The aim of this study was to assess distance, intermediate, and near visual acuity, contrast sensitivity, and patient satisfaction outcomes of a multifocal intraocular lens (IOL). Methods: This multicenter, prospective clinical study was conducted at seven study sites in Turkey. Patients who underwent bilateral cataract removal and implantation of a diffractive, acrylic, hydrophobic, multifocal IOL (Acriva UD Reviol MFB 625; VSY Biotechnology, Istanbul, Turkey) were included. The uncorrected and best corrected distance visual acuities (UCDVA and BCDVA), uncorrected and best corrected intermediate visual acuities (UCIVA and BCIVA), and uncorrected and best corrected near visual acuities (UCNVA and BCNVA) were measured preoperatively and at postoperative 1, 6, and 12 months. Distance and near visual acuity scores (VAS) contrast sensitivities were measured at these time points. Quality of life was evaluated by visual function-14 (VF-14) questionnaire. Results: Two hundred eyes of 100 patients were included. Monocular and binocular visual acuities at all distances showed improvement at postoperative 12 months compared to preoperative measurements (P < 0.001). Monocular and binocular UCIVA and binocular BCIVA at postoperative 12 months were significantly improved compared to measurements at 1 month (P < 0.001). Binocular contrast sensitivity at distance showed significant improvement from postoperative 1 month to postoperative 12 months, except for 3 cycles per degree (cpd; without glare) and 18 cpd (with glare). VAS improved from 75.96 at postoperative 1 month to 76.85 at postoperative 12 months. VF-14 score was 98.2 +/- 4.6. Conclusion: The Acriva UD Reviol MFB 625 appears to provide a good level of distance and near visual acuity, quality of life, and patient satisfaction. Further studies with longer follow-up will provide valuable insight into the long-term stability of these visual outcomes.
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    Contrast Sensitivity in Microtropic and Anisometropic Eyes of Successfully Treated Amblyopes
    (2017) Bayar, Sezin Akca; Oner, Ozlem; Oto, Sibel; Gokmen, Onur; Tekindal, Mustafa Agah; 0000-0003-0171-4200; 0000-0002-6058-4226; 0000-0002-4060-7048; 0000-0001-5109-755X; 28405480; AAJ-4668-2021; AAB-1096-2021; U-9270-2018; AAJ-2406-2021
    Objectives: To assess and compare contrast sensitivity function in the previously amblyopic and non-amblyopic "normal" eyes of patients with microtropia and anisometropia who achieved 20/20 visual acuity after occlusion therapy. Materials and Methods: Contrast sensitivity was tested monocularly on both eyes of 34 successfully treated microtropic and 15 anisometropic subjects (visual acuity 20/20 in both eyes). Contrast sensitivity function was evaluated by CSV-1000E and age-matched nomograms were used (spatial frequencies of 3, 6, 12, and 18 cycles per degree [cpd]) for comparison. Results: The mean age of subjects was 11.2 +/- 1.3 years in the microtropic group, 9.8 +/- 1.7 years in the anisometropic group (7-12 years); the mean follow-up time was 16.4 +/- 3.2 months (12 to 92) in the microtropic group and 27.7 +/- 1.8 months (12-84) in the anisometropic group. Statistical comparison of the microtropic amblyopic eyes versus non-microtropic eyes showed significant differences at spatial frequencies of 3, 12 and 18 cpd (3 cpd, t= 2.8, p= 0.007; 6 cpd, t= 1.1 p= 0.261; 12 cpd, t= 2.2, p= 0.033; 18 cpd, t= 2.2, p= 0.030). When anisometropic eyes were compared with non-anisometropic eyes, there was a significant difference only at 12 cpd (t= 2.1 p= 0.049). The comparison of non-amblyopic eyes versus age-matched nomograms revealed no differences at any of the spatial frequencies (p> 0.05 for all). Conclusion: Contrast sensitivity was decreased in patients with amblyopia, especially in the microtropic group. The assessment of contrast sensitivity function may serve as a new parameter for termination of occlusion therapy.