Hill, J F Eighteen-month clinical experience with extended wear silicone contact lenses on 400 patients. [electronic resource] - American journal of optometry and physiological optics Jul 1983 - 578-81 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0093-7002 Standard No.: 10.1097/00006324-198307000-00004 doi Subjects--Topical Terms: AdolescentAdultChildContact Lenses, Hydrophilic--standardsEvaluation Studies as TopicHumansMiddle AgedSilicone ElastomersTime Factors