In order to study on the adequate management of soft contact lenses, especially on cleaning procedures, the author made a questionnaire about the state for soft contact lenses of 86 students, then attempted to isolate microorganism contaminating on their lenses' surface. And bacteriological experiments on germicidal activity and cleaning efficasy of commercial cleaner (Meni-clean) for soft contact lenses contaminated artificially by Staph. epidermidis were also carried out.
The results obtained were as follows:
1) In the questionnaire, the actual methods of cleaning and disinfection by boiling soft contact lenses, disinfection of the wearer's fingers, employment of Hydro-care (protein remover), exchange of storage solution in their container were investigated. Consequently, it was found that a few students followed the management exactly as shown in the guidance.
2) A bacteriological studies were made on the state of contamination of soft contact lenses of 31 students picked up at random from 86 wearers. As a result, Ps. aeruginosa, Staph. epidermidis, Gram positive cocci, Gram positive bacilli, Gram negative bacilli and Fungi were isolated in higher concentration from storage solution than the surface of soft contact lenses wearing at present.
3) Judging from the inhibition of growth rate and elongation of lag phase, it can be said that Meni-clean has bacteriocidal action for Staph. epidermidis, too.
4) A bacteriological experiment was made on cleaning efficasy of soft contact lenses by 9 kinds of cleaning methods. As a result, it was found that the best cleaning effect for soft cleaning solution: 1.0ml, the number of scrubbing: 30 times for one lense in each cleaning.
5) By and by, the daily management for soft contact lenses, especially the cleaning procedure tends to be neglected, and so it is important to check up on the daily management, whenever the periodic examination are carried out.
View full abstract