title: The clinical performance of hard gas-permeable lenses.
abstract: Selected properties of hard gas-permeable materials are discussed in relation to their practical significance to the contact lens practitioner. Several factors to be considered when fitting hard gas-permeable lenses are reviewed and emphasis is placed upon the need for greater care in their handling and cleaning compared to PMMA lenses.
authors.affiliation: Department of Optometry and Visual Science, The City University, London, UK.
authors.forename: R M
authors.initials: RM
authors.lastname: Pearson