Visual acuity in hard and soft contact lens wearers: a comparison. Journal of the American Optometric Association [J Am Optom Assoc] Journal article

Visual acuity measurements with spectacles, with hard contact lenses and with hard contact lenses plus overrefraction were made on 75 eyes. Similar data was taken on 75 eyes wearing soft contact lenses. In each case, some eyes showed a decrease in visual acuity with contact lenses but the soft lenses wearers showed a greater percentage of eyes with visual acuity decrease.

Journal of the American Optometric Association [J Am Optom Assoc]

Contact Lenses
Contact Lenses, Hydrophilic
Eyeglasses
Humans
Refraction, Ocular
Refractive Errors
Visual Acuity