| Journal: | Ciencia & tecnología para la salud visual y ocular |
| Database: | PERIÓDICA |
| System number: | 000367867 |
| ISSN: | 1692-8415 |
| Authors: | Rey Rodríguez, Diana Valeria1 |
| Institutions: | 1Universidad El Bosque, Bogotá. Colombia |
| Year: | 2011 |
| Season: | Ene-Jun |
| Volumen: | 9 |
| Number: | 1 |
| Pages: | 11-18 |
| Country: | Colombia |
| Language: | Español |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | Dehydration in contact lenses causes changes in the material, which provokes alterations in the lens’ characteristics. Objective: to evaluate the degree of dehydration in three types of hydrogel contact lenses after ten consecutive hours of use. Materials and methods: 24 hydrogel contact lenses were evaluated: 8 Polymacon, 8 Ocufilcon D and 8 Vasurfilcon A. the lens was evaluated through a gravimetric method established by the IsO standards in order to determine the water content. Patients wore a contact lens in each eye for ten hours, after which the water content was once again evaluated at the laboratory in order to establish the dehydration percentages. Results: the water content of the Polymacon lens was 41.83%, which is different from the one reported by the manufacturer (38.6%), with a p-value of 0.015. the Omafilcon A lens showed a value of 58.81% different from the one reported by the manufacturer (60%), with a p-value of 0.006. the Vasurfilcon lens showed a value of 74.0%, as reported by the manufacturer, with a p-value of 0.83. A significance level of 5% was used. the average dehydration percentage after ten hours of use for the Polymacon lens was 12.1%; 3.7% for the Omafilcon; and 6.5% for the Vasurfilcon A. Conclusions: the Varsulfilcon A lens showed the same value reported by the manufacturer. the Omafilcon A lens showed a lesser degree of dehydration after using it compared to the other hydrogel lenses under study. no direct link was found between the water content and the dehydration percentage |
| Disciplines: | Medicina |
| Keyword: | Oftalmología, Lentes de contacto, Deshidratación, Hidrogeles |
| Keyword: | Medicine, Ophthalmology, Contact lenses, Dehydration, Hydrogels |
| Full text: | Texto completo (Ver HTML) |
