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Assessment of dysphotopsia following implantation with trifocal intraocular lenses

Poster Details

First Author: E.Law UK

Co Author(s):    R. Aggarwal   H. Kasaby   P. Buckhurst   H. Buckhurst           

Abstract Details


To assess dyphotopsia following bilateral implantation of the AT LISA Trifocal IOL using a patient quality of life questionnaire and the Zeiss Glare Simulator.


BMI Southend Private Hospital, UK


This study comprised 25 patients who had bilateral implantation of the AT LISA 839MP Trifocal IOL after routine phacoemulsification. A quality of life questionnaire was used to score patient satisfaction and difficulty experienced due to dysphotopsia. The Zeiss Glare simulator was used, allowing patients to recreate glare and halos experienced and attribute a score to this dysphtopsia. Patients were assessed at 3 and 6 months post-operatively.


All eyes had VA ≥ 6/7.5 and no post-operative astigmatism > 0.75DS. No patient experienced post-operative complications and no significant posterior capsular opacification was noted. A comparison of scores achieved by the simulation software and the quality of life questionnaire show that there is no direct relationship between dysphotpsia seen and the difficulty experienced by the patient. Both measures show an improvement in dysphotpsia scores over time, with halo score reducing from 50.4 ± 9.5 to 25.2 ± 9.0 at the second visit. Images have been created to illustrate the dysphotopsia experienced by individual patients.


The Zeiss Glare Simulator provides a valuable insight into dysphotopia experienced by patients following implantation of the AT LISA 839MP trifocal IOL. Comparison of simulator scores and quality of life questionnaire indicate that there is no direct correlation between size/intensity of halos and the difficulty these halos cause a patient, suggesting that patient lifestyle and personality traits may be more causative of difficulties from dysphotopsia. The improvement in scores over time indicates that there is neural adaptation to dysphotopsia and a larger study is required to fully investigate the phenomenon in these and other multifocal lenses.

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