Showing papers by "Lyndon Jones published in 1991"
TL;DR: Two cases are outlined in which a possible allergic‐type reaction occurred shortly after the instillation of 1% cyclopentolate hydrochloride in ‘Minims’ form, and practitioners are warned about the possibility of such reactions and ways of avoiding their occurrence.
41 citations
TL;DR: In this paper, three cases of Pseudomonas corneal ulceration occurred in a population of 120 patients who wore Acuvue disposable contact lenses on a daily wear basis for an average of 6.3 months (representing an annualized incidence of 4.8%).
35 citations
Journal Article•
01 Apr 1991-Centre for Health Research; Faculty of Health; Institute of Health and Biomedical Innovation
TL;DR: It is advocated that disposable contact lenses used on a daily wear basis should be subjected to surfactant cleaning prior to overnight disinfection.
Abstract: Three cases of pseudomonas corneal ulceration occurred in a population of 120 patients who wore Acuvue disposable contact lenses on a daily wear basis for an average of 6.3 months (representing an annualized incidence of 4.8%). Factors thought to be of etiological significance in the development of the ulcers include (1) omission of surfactant cleaning, (2) omission of a rub and rinse step, (3) use of a disinfecting solution of marginal efficacy, (4) use of a lens that attracts and rapidly deposits protein, and (5) patient non-compliance. We advocate that disposable contact lenses used on a daily wear basis should be subjected to surfactant cleaning prior to overnight disinfection.
30 citations
Journal Article•
01 Oct 1991-The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc
TL;DR: The results indicate that protein accumulation is highly material dependent, whereas lipid deposition is primarily patient dependent, and surfactant cleaning appears to be of little benefit in reducing deposits during the early stages of wear.
Abstract: One of the problems with hydrophilic contact lenses is that they are susceptible to spoilage. This study investigated the degree of spoilage associate with lenses of various surface changes during the early stages of wear and the effect of surfactant cleaning of lenses at this stage. Ten patients wore a control HEMA lens on one eye and either an ionic (Bufilcon A) or non-ionic (Tetrafilcon A) lens on the other for one week and used a peroxide system for disinfection. The lenses were then replaced with identical lenses, which were also worn for 1 week, with surfactant cleaning added to the care regimen. The lenses then were examined by fluorescence spectroscopy in order that the extent of lipid and protein deposition could be assessed. The results indicate that protein accumulation is highly material dependent, whereas lipid deposition is primarily patient dependent. Also the term "ionic" does not necessarily indicate equally enhanced deposition in all lenses so termed. Surfactant cleaning appears to be of little benefit in reducing deposits during the early stages of wear, its benefit in the long-term being of much greater significance.
14 citations
1 citations