Rotational and centration stability of the Rayner 600s intraocular lens over the 6 months post implantation

Session Details

Session Title: Pseudophakic IOLs: Monofocal

Session Date/Time: Monday 09/10/2017 | 16:30-18:00

Paper Time: 17:35

Venue: Room 2.1

First Author: : G.Bhogal-Bhamra UK

Co Author(s): :    S. Kolli   J. Wolffsohn                 

Abstract Details

Purpose:

Rotational stability is essential for a toric intraocular lens (IOL) to be able to adequately correct corneal astigmatism. A requirement of the American National Standards Institution (ANSI) standard (Z80.30-2010) is that rotational stability of at least 90% of patients is within 5 degrees over a 3 month period. This study examined whether this was the case for the new Rayner 600s IOL.

Setting:

National Health Service Ophthalmology Department, Queen Elizabeth Hospital, Birmingham, UK

Methods:

Twenty seven patients (aged 72.3±7.9 years) with healthy eyes were implanted monocularly with the 600s (Rayner, Worthing, UK). An image of the IOL was captured through a maximally dilated pupil (tropicamide 1.0% and phenylephrine 2.5%) immediately after surgery, after 1-3 days, 1 month and 3-6 months using a Keeler Symphony digital slit-lamp biomicroscope. The orientation of the IOL markings were image analysed compared to conjunctival blood vessel landmarks visible across all time points to correct for head and eye rotation. Centration was assessed by drawing ovals to circumscribe the IOL, pupil and limbus to compare the centres (0.01mm-per-pixel resolution).

Results:

Fibrosis presented the analysis or rotation and IOL centration in one subject. Of the remainder, the average rotation from immediately post-surgery to 1-3 days was 0.65±1.80 degrees (-3.21 to 5.61 [minus indicated anticlockwise]), to 1 month was 0.49±2.28 degrees (-4.49 to 4.91) and to 3 month was -0.36±2.60 degrees (-4.60 to 4.35). The average centration relative to the limbus immediate after surgery was 0.10±0.31mm horizontally, 0.17±0.28mm vertically, at 1-3 days 0.07±0.28mm/0.17±0.28mm, at 1 month 0.09±0.30mm/0.14±0.28mm and at 3 months -0.08±0.62mm/0.01±0.52mm [negative temporal and superior].

Conclusions:

The Rayner 600s IOL was found to be stable in terms of its rotation and centration after implantation, meeting the USA Food and Drug Administration prescribed ANSI standard.

Financial Disclosure:

research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented