View clinical trials related to Refractive Errors.
Filter by:The purpose of this study is to determine if reduced lens deposits and increased comfort can be achieved by using Multipurpose disinfecting solutions (MPDS) in a no-rub format but in conjunction with an intensive cleaner, rather than using MPDS in a rub format.
The purpose of this study was to measure front surface deposits on contact lenses when worn for ten hours.
The purpose of this study was to determine whether ocular surface sensitivity to pneumatic, mechanical and chemical stimulation would be affected by the use of the combination of a specific silicone hydrogel lens material with two lens care products over a four week period.
This study seeks to evaluate the clinical fitting performance of a new daily disposable contact lens to an existing daily disposable contact lens.
This study seeks to evaluate the clinical and subjective performance of a new daily disposable soft contact lens.
This study seeks to evaluate the impact of wearing a new daily disposable soft contact lens on the neophyte population.
This study seeks to evaluate the clinical and subjective performance of two established soft contact lenses.
This research project will compare two methods of correcting refractive error (long or short-sightedness) with spectacle lenses. The primary outcome is the proportion of the population requiring spectacle correction who's needs are met through each scheme. Secondary outcomes are the cost effectiveness of these schemes and development of guidelines for identification of those amongst the population suitable for 'ready-made' spectacles. There are two sites involved in this research. Those with uncorrected refractive error will be identified by their distance vision. Those who have impaired vision (at least 20/40) which improves with spectacles will be invited to participate in this research. Participants will be randomly allocated to one of two groups. The first group will receive spectacles with full correction in both eyes and the second group will receive spectacles from a limited inventory. The two schemes will be compared by how many people continue to use the spectacles, vision with the new spectacles, change in the level of visual functioning and quality of life after wearing new spectacles for one month. At the one month visit, if the spectacles provided are not useful, one new pair of custom spectacles will be dispensed.
This study seeks to evaluate the clinical performance of a recently released contact lens designed to correct astigmatism to an established contact lens that has historically been used in these patients.
This study seeks to evaluate the clinical performance of a new CE marked daily disposable contact lens that contains a wetting agent to a recently improved daily disposable contact lens.