Visual performance of silicone hydrogel daily disposable contact lenses (original) (raw)

To analyze the variation in vertical coma and the rest of ocular aberrations before and after fitting prismatic soft contact lenses (PSCL). Method: Thirty-seven eyes of 20 healthy subjects (24.30 ± 2.03 years) were evaluated in order to analyze the variation in ocular wavefront aberrations before and after fitting PSCL of different base-down prism values (1.0, 1.5 and 2.0 PD), designed to study its influence in the compensation of vertical coma aberration. A Hartmann-Shack sensor with a wavelength of 780 nm was used, considering a pupil size of 3 mm. Additionally, the influence of PSCL in visual function under photopic conditions in terms of highcontrast visual acuity and contrast sensitivity was evaluated. Results: There were statistically significant differences (p < 0.05) in ocular aberrations from 1st to 7th order after fitting PSCL, but only the differences in vertical tilt, horizontal tilt, defocus, vertical astigmatism and vertical coma were clinically relevant (Strehl Ratio < 0.8). The mean of vertical coma (m) was 0.