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The Symfony IOL: a review of 500 cases and determination of the ideal postoperative spherical equivalent

Poster Details

First Author: A.Hamid UK

Co Author(s):    A. Sokwala   C. Stephenson   B. Ilango   J. Moayedi   M. Saeed   V. Savant     

Abstract Details


To determine the ideal range of post operative spherical equivalent which will give both good distance uncorrected visual acuity (UCVA) and Near uncorrected visual acuity (NUCVA).


Optimax and Ultralase Eye Clinics, London, UK


Retrospective review of 500 consecutive cases performed by several surgeons in a multi centre review. The ideal spherical equivalent was determined by the greatest numbers of yes with UCVA of 20/25 or better and NUCVA of N8 or better.


The ideal postoperative spherical equivalent was between -0.25 to +0.25D. This achieves the highest percentage of patients with both UCVA of 20/25 (77%) or better and (68%) N8 or better. A negative defocus of -0.25D from emmetropia increases the number of patients with better near UCVA with no sacrifice of Distance UCVA. A positive defocus from emmetropia of up to +0.5D reduces near UCVA significantly while maintaining good levels of distance UCVA.


Aiming for a post operative spherical equivalent close to emmetropia allows excellent levels of both Distance UCVA and Near UCVA. A slight negative defocus allows for better levels of near UCVA.

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