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First Author: S.Nagappa INDIA
Co Author(s): S. Das M. Kurian M. Paryani
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Assess objectively visual acuity at different contrast levels after cataract surgery with aspheric Monofocal and multifocal intraocular lens implantation using double pass technique
Narayana Nethralaya, Tertiary eye care center, Bangalore
41 patients who underwent cataract extraction with aspheric monofocal (AMO Tecnis and Alcon Acrysof IQ) and multifocal intraocular lens (AMO Tecnis Multifocal and Alcon Acrysof IQ Restor) implantation underwent OQASTM (optical quality analysis system,Visiometrics ) test. Visual acuity at different contrast levels (contrast sensitivity visualisation) was assessed in patients with postoperative uncorrected distance visual acuities of 6/9 or better at 6weeks followup. Mean of visual acuities at contrast levels 100%, 20% and 9% were assessed for each group. Unpaired t-test was used for statistical analysis.
The mean visual acuity at 100%,20%,9% contrast levels were 1.04,0.75,0.43 in Alcon Acrysof IQ group; 0.9,0.63,0.39 in AMO tecnis monofocal group ; 0.8,0.55,0.36 in Alcon Acrysof Restor IQ group ;0.88,0.68,0.43 in AMO Tecnis multifocal group. Unpaired t-test revealed a statistically significant difference between monofocal and multifocal IOLs p-value of 0.008 at 9% contrast.
Computed visual acuity at very lower contrast is better in monofocal group as compared to multifocal group.