To compare visual performance of extended depth-of-focus (EDOF) prototypes with a new, center-near, commercial, multifocal contact lens.Methods:
Presbyopic participants (n=57) wore 1-Day ACUVUE MOIST MULTIFOCAL (1DAMM) and an EDOF prototype for one week in a double-masked, prospective, cross-over, randomized clinical trial. Manufacturers' guide was used to select the first pair of lens to be fit based on subjective distance refraction and near addition. After one week, high- and low-contrast visual acuities were measured at distance (6 m), intermediate (70 cm) and near (50 and 40 cm), and stereopsis at 40 cm. Subjective performance was assessed on a 1 to 10 numeric rating scale for vision clarity and lack of ghosting at distance, intermediate and near, vision stability, haloes at night time, overall vision satisfaction, and ocular comfort. Linear mixed models were used for analysis and the level of significance was set at 5%.Results:
1DAMM was not significantly different from EDOF for high- or low-contrast visual acuity at any distance, or for stereopsis. Subjectively, EDOF was significantly better than 1DAMM for vision clarity at intermediate (P=0.033) and near (P<0.001), overall lack of ghosting (P=0.012), vision stability (P=0.004), and overall vision satisfaction (P=0.005). For all other subjective variables, there were no differences between EDOF and 1DAMM (P>0.05).Conclusions:
EDOF prototype lenses offer improvements over the newly marketed 1DAMM lenses for several subjective variables.