Posters - A CLINICAL COMPARISON OF LIMBAL AND PARALIMBAL SUPERIOR EPITHELIAL ARCUATE LESIONS (SEALs) IN HIGH DK EW.

Home

This Month

Editorial
Market Utilization of Silicone Hydrogel Lenses up to 2010
> more

Meeting Synopsis
American Academy of Optometry 2009 Meeting, part 2
> more

Posters
UV Blocking Silicone Hydrogels prevent UV induced damage
> more

In The Practice
Endothelium and SiH lens fitting considerations
> more

Tell a friend

> Home
> About Us
> Affiliates
> Contact Us
> Disclaimer
> Site Map

Quick Vote:
What proportion of your new fits are with silicone hydrogel materials? click

Would you like to subscribe to our monthly newsletter? > click

The Silicone Hydrogels website is partially supported through an educational grant from CIBA VISION

Posters

December 2001

A CLINICAL COMPARISON OF LIMBAL AND PARALIMBAL SUPERIOR
EPITHELIAL ARCUATE LESIONS (SEALs) IN HIGH DK EW.

Nicole O'Hare, Thomas Naduvilath, Deborah F. Sweeney, Brien A. Holden
Cornea and Contact Lens Research Unit, School of Optometry and
Cooperative Research Centre for Eye Research and Technology, University of New South Wales, Australia.

Purpose:

SEALs have been observed to occur in two locations during high Dk EW:
- limbal (<0.8mm from the limbus)
- paralimbal (>0.8mm from the limbus).
The purpose of this study was to determine if the clinical features, symptoms, exposure to high Dk EW and recurrence rates associated with these 2 locations of SEALs were different.

Method:

Twenty four cases of SEALS in 14 subjects wearing prototype high Dk lenses on a 6 or 30 night EW schedule were examined at the slit lamp biomicroscope and completed a symptoms questionnaire at the time of presentation. After white light examination (magnification, 16-25x) for the presence of infiltrates, sodium fluoroscein was instilled and the cornea was immediately examined with cobalt blue light (magnification, 16x) and a thin optic white light section (25-40x magnification) for depth of the staining. Chi squared analysis was used to compare the proportion of the 2 locations of SEALs and Fisher's Exact Test for the clinical features of each group.

Results:

There was a significantly higher proportion of limbal (71%) compared to paralimbal (29%) events, (p=0.04). The incidence of diffuse infiltrates was higher in the paralimbal (86%) compared to the limbal (41%) group, (p=0.08). The paralimbal group also reported a higher proportion of symptoms and had a higher recurrence rate in the same eye, however this did not reach statistical significance.

Conclusions:

While SEALs found within 0.8mm from the limbus are more prevalent, SEALs outside this limbal zone maybe more likely to have underlying infiltration.

Download PDF of Poster:

A CLINICAL COMPARISON OF LIMBAL AND PARALIMBAL SUPERIOR EPITHELIAL ARCUATE LESIONS (SEALS) IN HIGH DK EW - 212KB

You will need Version 4 or later of Adobe Acrobat Reader to view some documents on this site. You can get the latest version from the Adobe Home site.