The point-to-point variation of oxygen delivery to a cornea covered by a hydrogel contact lens in the open eye |
| |
| Affiliation: | 1. Brien Holden Vision Institute, Sydney, Australia;2. School of Optometry and Vision Science, University of New South Wales, Sydney, Australia;3. Vision CRC, Sydney, Australia;1. Departmento de Termodinámica Aplicada. Escuela Técnica Superior de Ingenieros Industriales (ETSII), Universitat Politécnica de Valencia, Campus de Vera s / n, 46020 Valencia, Spain;2. Department de Física, Universitat Jaume I- 12080, Castellon, Spain;3. Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;4. Centro de Investigación en Acuicultura y Medio Ambiente (ACUMA), Universitat Politècnica de València, Campus de Vera s / n, 46020 Valencia, Spain;5. Department of Polymers, Materials Research Institute, National Autonomous University of Mexico, Ap Postal 70-360, Coyoacan, Mexico City, Mexico |
| |
| Abstract: | The amount of oxygen reaching a point on a cornea covered by a stationary hydrogel contact lens depends upon the oxygen transmissibility of that portion of the lens immediately anterior to that point. Calculation of the oxygen flux to the cornea requires that the oxygen tension at the lens-cornea interface be known. Previously published investigations give this oxygen tension for a variety of hydrogel lenses, thereby permitting calculation of areal distribution of oxygen delivery to the cornea. The difference in oxygen flux to the cornea from the lens center to the periphery for an optically powered lens is less extreme than is predicted from center-to-periphery variation in lens thickness. The uniformity of oxygen flux from center to periphery may explain why hydrogel lenses of high optical power can be worn successfully. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
