Evaluación del grado de deshidratación en diferentes lentes de hidrogel usados durante diez horas



Título del documento: Evaluación del grado de deshidratación en diferentes lentes de hidrogel usados durante diez horas
Revista: Ciencia & tecnología para la salud visual y ocular
Base de datos: PERIÓDICA
Número de sistema: 000367867
ISSN: 1692-8415
Autores: 1
Instituciones: 1Universidad El Bosque, Bogotá. Colombia
Año:
Periodo: Ene-Jun
Volumen: 9
Número: 1
Paginación: 11-18
País: Colombia
Idioma: Español
Tipo de documento: Artículo
Enfoque: Experimental
Resumen en inglés 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
Disciplinas: Medicina
Palabras clave: Oftalmología,
Lentes de contacto,
Deshidratación,
Hidrogeles
Keyword: Medicine,
Ophthalmology,
Contact lenses,
Dehydration,
Hydrogels
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