This web site is no longer actively maintained. Please visit for up to date information.
Powered by Google
This Month
Ocular Surface Characteristics of the Asian Eye
Meeting Synopsis
Academy 2010
pective Analysis of Risk Factors Associated With Contact Lens Induced Inflammatory Events During Continuous Wear
Feature Review
Adequate tear mixing under a soft contact lens may play an important role in minimizing certain > more
Tell a friend
> Home
> About Us
> Affiliates
> Contact Us
> Disclaimer
> Site Map


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

Posters | Archive
November 2005


Case Report: Silicone Hydrogel Microbial Keratitis

Guillon, Michel, Will Ayliffe, Marine Gobbe, Nita Mahalingham (Optometric Technology Group), Alex Day


BACKGROUND: The case report relates to a contact lens wearing patient referred with painful, photophobic red eye to Croydon Eye Hospital casualty by a local optometrist. The report describes a case of pseudomonas aeriginosa ulcer with 30 day continuous wear silicone hydrogel, highlighting contributory factors to the severity of the event that lead to vision loss and permanent scarring.

CASE REPORT(S): The patient, a 26-year-old female, had successfully worn Easy Vision All Day All Night (Lotrafilcon A) contact lenses for 3 years, changing her contact lenses monthly, and wearing them without removal on average of 30 days. She presented to her contact lens practitioner at midday complaining of pain, itchiness, redness, and light sensitivity. After examination, she was instructed not to wear contact lenses and was sent home. The following day the patient consulted an optometrist local to her home with increased lacrimation, redness and pain and was immediately referred. She was diagnosed to have microbial keratitis and corneal scrapping isolated pseudomonas aeruginosa. Aggressive treatment was immediate (Ofloxacin hourly, Gentamicin hourly) and included hospitalization. Examination one month post-event included LogMAR visual acuity, videokeratoscopy, videoaberroscopy, slit lamp photography, confocal microscopy. It revealed permanent VA loss, increased corneal aberrations, multiple deep corneal scarring within the pupillary area and endothelial cell loss.

CONCLUSIONS: The poster will describe in details this case history that confirms that despite full respect of the cornea oxygen physiological needs, silicone hydrogel can produce mechanical corneal damage that facilitates bacterial penetration and infection. The case highlights the need for rapid and correct diagnosis and the very grave consequences of delay in treatment.

Download PDF of Poster:
Download - 289 KB
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. 


All rights reserved, copyright 2002 - 2007