Loss of power with flexure of hydrogel plus lenses.
Both clinical impressions and theoretical analysis suggest a slight loss of power with flexure of low-plus-power hydrogel contact lenses. Low-minus-power hydrogel lenses do not appear to change power. This study confirms this effect.
D003263:Contact Lenses, Hydrophilic; D006801:Humans; D055095:Optics and Photonics; D012030:Refractive Errors