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Differences of optical bench analysis between spherical and aspheric optic designs of a hydrophilic IOL platform

Poster Details

First Author: R.Khoramnia GERMANY

Co Author(s):    T. Tandogan   S. Liebing   M. Holzer   G. Auffarth           

Abstract Details

Purpose:

To analyze the optical bench quality of a spherical and an aspheric design of the same intraocular lens (IOL) model.

Setting:

David J Apple International Laboratory for Ocular Pathology, University Eye Hospital Heidelberg, Heidelberg, Germany

Methods:

We analyzed 26 D spherical C-flex 570 C and aspheric C-flex 970 C IOLs (Rayner Intraocular Lenses Limited, UK) using the OptiSpheric (Trioptics, Germany) optical bench. We evaluated the modulation transfer function (MTF) at 50 lp/mm and 100 lp/mm and the Strehl ratio using a 3 mm (photopic) and 4.5 mm (mesopic) aperture, respectively.

Results:

At 50 lp/mm, the MTF values were 0.713/0.805 (C-flex 570 C / C-flex 970 C) for a 3 mm aperture and 0.294/0.591 for a 4.5 mm aperture. At 100 lp/mm, the MTF values were 0.524/0.634 for a 3 mm and 0.198/0.344 for a 4.5 mm aperture. The Strehl ratio was 0.806/0.925 for a 3 mm and 0.237/0.479 for a 4.5 mm aperture.

Conclusions:

The aspheric IOL design achieved higher MTF values at both apertures. The differences between the aspheric and spherical design were more pronounced at mesopic conditions. This suggests that patients with larger pupil sizes and/or working in mesopic conditions might benefit more from an aspheric IOL design.

Financial Disclosure:

One or more of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, One or more of the authors travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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