[Measurement of visual acuity at different distances after implantation of ReSTOR multifocal intraocular lenses].

OBJECTIVE

To measure visual acuity (VA) at different distances after implantation of ReSTOR multifocal intraocular lens (MIOL) and to evaluate the variation of VA with different distances.

METHODS

It was a prospective case series study. Thirty eyes of 22 patients received the ReSTOR MIOL in this prospective case series study. VA was measured at several distances, and was recorded in a defocused range of 0 to -4.5 diopters (D) with gradually reduced minus spectacles based on distant refraction. A questionnaire was used to assess the satisfaction about VA of different distances. The mean follow-up time was three months.

RESULTS

Postoperatively, the manifest refraction spherical equivalent was within +/- 1.00 D in 28 of 30 eyes (93.3%) and the astigmatism was within 1.00 D in 23 of 30 eyes (76.7%). The mean uncorrected distance (5 m), intermediate (60 cm) and near (33 cm) VA were 0.91, 0.40 and 0.64, respectively. The mean VA at 0 D, -1.50 D and -3.00 D pseudoaccommodation were 1.00, 0.49 and 0.79, respectively. On the questionnaire, five patients complained of unreality when walking, and two computer workers complained that they could not see screen clearly, and one hair-cutter complained that he could not see hair clearly. Self-score of satisfaction about distant, intermediate and near VA were 8.0, 7.5 and 8.0, respectively.

CONCLUSIONS

Implantation of the ReSTOR MIOL offers excellent distant and near VA. The VA decreases significantly at intermediate range as compared to distant and near vision, which might reduce the quality of life for patients who need excellent vision at intermediate range.