To evaluate and compare the wavefront characteristics of normal eyes with and without hydrogel soft contact lenses for correction of myopia.
Higher order aberrations (HOA) of 30 eyes of 15 soft contact lens users who had no ocular diseases other than myopia were quantified with a Nidek Marco three dimensional Wave wavefront analyzer. Zernike’s polynomial was used to describe the wavefront measurements. Root mean square (RMS) values of the total HOAs, total coma, total trefoil and total spherical aberrations were obtained in the same eyes with and without soft contact lenses. We used paired sample t-test to analyze the data.
Mean RMS values for all higher order aberration components with and without soft contact lenses were: total HOA 0.364 ± 0.129 μm without lenses and 0.456 ± 0.175 μm with lenses (P = 0.01), total coma 0.203 ± 0.095 μm without lenses and 0.220 ± 0.133 μm with lenses (P = 0.51), total trefoil 0.193 ± 0.074 μm without lenses and 0.254 ± 0.153 μm with lenses (P = 0.06), total spherical aberration 0.126 ± 0.121 μm without lenses and 0.148 ± 0.095 μm with lenses (P = 0.36).
Wavefront analysis showed soft contact lenses for myopia induced a significant increase in total HOA. Though total coma, trefoil and spherical aberrations were also higher with contact lenses they were not statistically significant when individually evaluated and compared to values without contact lenses.