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A retrospective review of refractive outcomes and surgically induced astigmatism in two different intraocular lenses

Poster Details


First Author: H.Lee UK

Co Author(s): N. Patel                    

Abstract Details

Purpose:

To review and compare refractive outcomes of two different in the bag intra ocular lens implants following routine cataract extraction.

Setting:

Large district general hospital in East Kent, England

Methods:

Refractive outcomes from routine cataract surgery using lens 1 - a hydrophilic aspheric intra ocular lens implant (Rayner C-flex) and lens 2 - a hydrophobic aspheric intraocular lens implant (Zeiss CT Lucia) which are delivered via a clear corneal wound following phacoemulsification. Statistical analysis Excel Microsoft v 2003 - 2007 and Graphpad software was used to analyse data.

Results:

218 eyes for Lens 1 and 427 for Lens 2 were analysed. Lens 1 was implanted by a single consultant surgeon and Lens 2 were implanted by surgeons of consultant and registrar grades. There was no statistically significant difference between the prediction error of spherical equivalent between the two intra-ocular lenses. (unpaired t-test p = 0.9). 84.9% and 89.3% of refractive outcomes were within +/-1D of predicted for Lens 1 and Lens 2 respectively. There was a statistically significant cylindrical change pre and post op for Lens 1.

Conclusions:

There was no statistically significant difference in the prediction error of spherical equivalent between the two intra ocular lenses. Lens 1 required loading of the IOL in a provided lens injector requiring extension of the 2.75mm incision wound which may explain the change in post operative cylinder. Lens 2 was a pre-loaded IOL delivered through a 2.75mm wound. Limitation to our retrospective review is the comparison of single surgeon of Lens 1 to multi-surgeon outcomes of Lens 2. We are currently in the process of direct head to head comparison of Lens 1 and 2.

Financial Disclosure:

None

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