Sferik Kontakt Lens Kullanan Hastalarda Farklı Kontakt Lens Tasarımlarının Görme Kalitesine Olan Etkisi

Purpose: To evaluate the effects of different lens designs on visual quality among soft spherical contact lens users.\udMaterial and Method: Forty eyes of twenty patients from our contact lens unit were included in this study. Refractive errors of the patients\udwere between -0.50 and -6.0 diopters with <0.75 diopters of astigmatism. Patients wore aspherical designed Balafilcon A (Purevision- Bausch\udand Lomb) and spherical designed Senofilcon A (Acuvue Oasys- Johnson and Johnson) in a random order. We recorded and compared\udthe visual acuity with Snellen chart, contrast sensitivity values with Bailey-Lovie chart in letters, mean root mean square (rms) of corneal\udaberration values measured by Nidek Magellan Mapper for each eye of all patients with contact lenses on and off and with glasses.\udResults: Mean age of the patients included in the study was 24.55 (±4.63) years. 85% (n=17) of patients were female and 15%(n=3) were\udmale. Best-corrected visual acuity was 1.0 (10/10) lines with both glasses and contact lenses. During low contrast sensitivity measurements,\udwe observed 4-5 letters of mean increase with both contact lenses compared to glasses. We did not observe significant difference of contrast\udsensitivity between spheric and aspheric contact lenses (p>0.05). Total higher order aberration mean rms value was 0.29±0.10 µm without\udglasses, while it was 0.33±0.10 µm with Balafilcon A lenses and 0.31±0.10 µm with Senofilcon A lenses. Higher order aberration values\udmeasured after contact lens application did not show a significant difference for two contact lens designs (p>0.05).\udDiscussion: High and low contrast sensitivity values were better with spectacles compared to contact lenses. We did not observe significant\uddifference in higher order aberration values and visual quality between aspheric and spheric designed lenses. (Turk J Ophthalmol 2013; 43:\ud321-5