Regular replacement of extended wear rigid gas permeable contact lenses

Woods, Craig A. & Efron, Nathan (1996) Regular replacement of extended wear rigid gas permeable contact lenses. The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, 22(3), pp. 172-178.


PURPOSE: While the benefits of planned replacement of soft contact lenses have been investigated, the question of whether there are any clinical benefits to planned replacement of rigid gas permeable (RGP) lenses does not appear to have been addressed experimentally. We aimed to determine the benefits of regular replacement of extended wear RGP contact lenses. METHODS: We conducted a prospective, single-center, controlled, double-masked study of 39 RGP lens wearers. The subjects were divided into two groups and wore extended wear Quantum 2 lenses (Dk = 120) for 12 months. Subjects in Group I replaced lenses every 3 months, whereas those in Group II were not scheduled to replace their lenses. The integrity of the lenses and the ocular responses to lens wear were monitored in both groups every three months. RESULTS: Compared to lenses worn by subjects in Group I, lenses worn by Group II subjects showed significantly more mucous coating, lens binding, and corneal staining over time (P < 0.05; ANCOVA). There was no difference in microcystic or tarsal conjunctiva response, lens comfort, refractive change, or visual acuity between the two groups. CONCLUSIONS: We advocate that to maintain optimal lens integrity and ocular health, RGP lenses used for extended wear should be replaced every 3 to 6 months.

Impact and interest:

14 citations in Scopus
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 3388
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see link) or contact the author. Author contact details:
Additional URLs:
Keywords: Contact Lenses, Extended, Wear, Refractive Errors, therapy, Adult, Analysis of Variance, Comparative Study, Conjunctivitis etiology, Conjunctivitis prevention & control, Double, Blind Method, Female, Follow, Up Studies, Humans, Male, Prospective Studies, Prosthesis Fitting, Refractive Errors physiopathology, Research Support, Non, U, S, Gov't, Visual Acuity
ISSN: 0733-8902
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1996 Contact Lens Association of Ophthalmologists
Deposited On: 10 Feb 2006 00:00
Last Modified: 10 Aug 2011 18:24

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page