Background: Daily disposable contact lenses are considered to be the pinnacle of safe contact lens wear, yet it has been suggested that it takes some period of wear for the lens surface to reach optimal compatibility with the ocular surface. This study assesses the influence of brief treatment with a conditioning drop on the ocular response to new contact lenses over a single day of wear. Methods: The study was a single-masked, paired (contralateral) comparison of the signs
BACKGROUND: A number of studies have highlighted the problems with driving reported by wearers of monovision contact lens corrections. In this study, we wished to investigate this further, by determining whether driving performance as measured on the open road under daytime conditions is worse when drivers wear their monovision contact lenses compared to their habitual correction. METHODS: Thirteen subjects with healthy eyes and corrected visual acuity of 6/6 were selected. Each had worn monovision contact lenses for at least three months. All subjects had their driving performance assessed while driving their own vehicles on an open road course, with both monovision contact lenses and their other habitual correction (spectacles or unaided). RESULTS: No statistically significant differences were found in driving performance when subjects wore their monovision contact lenses compared to when they wore their habitual distance correction. CONCLUSIONS: The results indicate that monovision does not adversely affect driving performance in daylight hours for adapted wearers. However, limitations in the study design are acknowledged, including the relatively small sample size, lack of standardisation of the habitual correction and the use of adapted wearers. Future studies are recommended to investigate these issues further.
A case of unilateral Salzmann's nodular degeneration of the cornea is reported. The elevated corneal nodules were accompanied by a prominent Hudson‐like, iron line.
In a prospective study, we have investigated the effect of lens care system instructions on the rate of compliance of 44 subjects who each used three different lens care systems (cross‐over design), each system for a two‐week period. All three lens care system instructions recommended hand washing prior to lens handling, a daily cleaning procedure, a daily disinfection procedure, but varied in the recommended frequency of case cleaning. Compliance was assessed by observing the subject's normal care routine at an aftercare consultation and by questioning the subject. The compliance with daily cleaning and disinfection procedures was high throughout the six weeks. Compliance with hand washing instructions was initially relatively poor, but improved over time. The frequency of case cleaning was significantly influenced by the lens care system instructions and by patient‐specific factors. Compliance was not significantly influenced by the optometrist delivering lens care instructions, however, with some aspects of compliance this association approached statistical significance.
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