Visual performance of a new bi-aspheric, segmented, asymmetric multifocal IOL

PURPOSE: To assess the visual performance and subjective experience of eyes implanted with a new bi-aspheric, segmented, multifocal intraocular lens: the Mplus X (Topcon Europe Medical, Capelle aan den IJssel, Netherlands).

METHODS: Seventeen patients (mean age: 64.0 + 12.8 years) had binocular implantation (34 eyes) with the Mplus X. Three months after the implantation, assessment was made of: manifest refraction; uncorrected and corrected distance visual acuity; uncorrected and distance corrected near visual acuity; defocus curves in photopic conditions; contrast sensitivity; halometry as an objective measure of glare; and patient satisfaction with unaided near vision using the Near Acuity Visual Questionnaire.

RESULTS: Mean residual manifest refraction was -0.13 + 0.51 diopters (D). Twenty-five eyes (74%) were within a mean spherical equivalent of -0.50 D. Mean uncorrected distance visual acuity was +0.10 + 0.12 logMAR monocularly and 0.02 - 0.09 IogMAR binocularly. Thirty-two eyes (94%) could read 0.3 or better without any reading correction and all patients could read 0.3 or better with a reading correction. Mean monocular uncorrected near visual acuity was 0.18 + 0.16 logMAR, improving to 0.15 + 0.15 logMAR with distance correction. Mean binocular uncorrected near visual acuity was 0.11 - 0.11 logMAR, improving to 0.09 - 0.12 logMAR with distance correction. Mean binocular contrast sensitivity was 1.75 _ 0.14 log units at 3 cycles per degree, 1.88 _ 0.20 log units at 6 cycles per degree, 1.66 + 0.19 log units at 12 cycles per degree, and 1.11 - 0.20 log units at 18 cycles per degree. Mean binocular and monocular halometry showed a glare profile of less than 10 of debilitating light scatter. Mean Near Acuity Visual Questionnaire Rasch score (0 = no difficulty, 100 = extreme difficulty) for satisfaction for near vision was 20.43 - 14.64 log-odd units.

CONCLUSIONS: The Mplus X provides a good visual outcome at distance and near with minimal dysphotopsia. Patients were very satisfied with their uncorrected near vision.