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Effect of implanting a Sulcoflex IOL in patients with negative dysphotopsia: comparison between clinical results, biometrical data and optical modelling

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Session Details

Session Title: Pseudophakic IOL Power Calculation: Photic Phenomena after IOL Implantation

Session Date/Time: Sunday 08/10/2017 | 16:30-18:00

Paper Time: 17:48

Venue: Room 3.4

First Author: : N.Makhotkina THE NETHERLANDS

Co Author(s): :    V. Dugrain   T. Berendschot   D. Purchase   R. Nuijts           

Abstract Details


Purpose: To evaluate whether the outcome of negative dysphotopsia (ND) treatment by implantation of a Sulcoflex IOL (Rayner Intraocular Lenses Ltd.) can be understood using individual biometry and optical modelling data.


Setting: University Eye Clinic, Maastricht University Medical Centre, Maastricht, The Netherlands and Rayner Intraocular Lenses Ltd., East Sussex, United Kingdom.


Methods: Optical modelling of patient-specific data from retrospective case series. Ten eyes of eight patients with ND were treated with implantation of a Sulcoflex IOL. Biometric and perimetric measurements were used for evaluation of the treatment. Pre- and postoperative patient-specific optical models of eyes with ND were constructed in Zemax OpticStudio program. The rays from a 3D Ganzfeld light source were traced for 4 different iris apertures and light irradiance was evaluated as a function of degrees of eccentricity relative to the centrum of visual field. Relationship between biometric parameters, ray-tracing data and ND course was evaluated.


Results: ND resolved completely in six, partially in two and persisted in two eyes. There was no relationship between ND course and age, IOL power, or individual biometry. Ray tracing modelling of preoperative data showed a marked decrease in light irradiance at the periphery relative to the centre of visual field. The peripheral light irradiance with 1.5 mm pupil diameter significantly increased after Sulcoflex IOL implantation (p< 0.05). For larger pupils, no improvement was observed. Although the increase in light irradiance increased with increasing resolution of ND after surgery, it did not reach statistical significance (p = 0.065).


Conclusions: Ray-tracing modelling, which combines all biometry results of a given patient, shows encouraging correlation with ND course. This provides an opportunity to predict the effect of supplementary IOL implantation on ND using patient-specific optical models.

Financial Disclosure:

is employed by a forNONEprofit company with an interest in the subject of the presentation, receives nonNONEmonetary benefits from a company producing, developing or supplying the product or procedure presented.

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