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First Author: M.Pande UK
Co Author(s): A. Bourne E. Proudfoot
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The optical designs of the a one piece aspheric full zone diffractive and an asymmetric zonal refractive multifocal IOLs have signifcant differences in the light energy distribution at its multiple foci. This report compares and contrasts the functional vision and objective task assessment outcomes between eyes with a one piece aspheric full zone diffractive multifocal IOL and an asymmetric zonal refractive multifocal IOL
Private Practice & Research Centre
2 groups of 20 eyes each who underwent refractive cataract surgery or lens exchange surgery by a single surgeon using a one piece aspheric full zone diffractive multifocal IOL and an Asymmetric zonal refractive multifocal IOL had functional vision assessment using the PANFOCAL VA method 4 to 8 weeks after surgery. At the same examination, an objective task assessment for intermediate computer vision and a range of near vision reading tasks in photopic and mesopic conditions was also carried out. Non parametric tests were used to test the differences identified.
Functional vision assessment showed very similar visual acuities for distance and photopic near vision. Differences were identified in mesopic near vision acuities in favour of the one piece aspheric full zone diffractive multifocal IOL. Intermediate visual acuities were variable in both groups although there was trend towards the asymmetric zonal refractive multifocal IOL. Objective task assessments showed that both gruops were able to perform near vision tasks in photpic conditions very well while significant differences identified in mesopic near vision task performance. Intermediate task performance was variable in both groups
The functional vision performance and objective task assesswment in the two groups was comparable for distance and photopic near vision. Differences were identified in the mesopic near vision between the groups.Objective task assessments were consistent with the functional vision results.
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