Resumen de Comparison of visual function with aspheric yellow, aspheric clear and spherical clear intraocular lenses
PURPOSE: To compare visual outcomes, contrast sensitivity, color vision and patient satisfaction after implantation of yellow-tinted aspheric intraocular lenses (IOLs) or clear (untinted) IOLs with either aspheric or spherical designs.
SETTING: Eye Surgery Center, Erlangen, Germany.
METHODS: Patients with senile monocular cataract were randomly assigned to receive either a blue light-filtering aspheric IOL (Aspira-aAY group), its clear aspheric counterpart (Aspira-aA group) or the clear spherical model (AS group). The primary outcome measures were visual acuity for distance, intermediate (1 m), near (40 cm), contrast sensitivity under photopic (85 cd2 ) and mesopic (3 cd2 ) conditions, with and without glare (Optec 6500 Vision Tester), color vision (Farnsworth-Munsell 100-hue test, photopic conditions) and patient satisfaction.
RESULTS: One-year postoperatively, there were 28 eyes in the Aspira-aAY group; 19 eyes in the Aspira-aA group and 24 eyes in the AS group. There were no significant differences between the 3 groups in terms of uncorrected and distance corrected visual acuity for far, intermediate and near and for color vision. Contrast sensitivity under all lighting conditions tested and patient satisfaction were similar between the Aspira-aAY and Aspira-aA groups.
The AS group achieved slightly worse contrast sensitivity scores and patient satisfaction levels than the other groups. Slitlamp examinations revealed no glistening, IOL decentration or tilt in any of the cases.
CONCLUSIONS: One year postoperatively, the yellow-tinted and clear aspheric IOLs gave similar outcomes for visual acuity, contrast sensitivity, color perception and patient satisfaction. The spherical IOL provided slightly worse contrast sensitivity and patient satisfaction.
