Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses
| ISSN: |
1573-2630
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|---|---|
| Keywords: |
computer assistance ; contact lens ; corneal physiology ; high Dk material ; keratoconus
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Medicine
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| Notes: |
Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798296653756628992 |
|---|---|
| autor | Kok, J. H. C. Cheng, K. H. |
| autorsonst | Kok, J. H. C. Cheng, K. H. |
| book_url | http://dx.doi.org/10.1007/BF00171029 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLM194443515 |
| iqvoc_descriptor_keyword | iqvoc_00000092:material |
| issn | 1573-2630 |
| journal_name | International ophthalmology |
| materialart | 1 |
| notes | Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications. |
| package_name | Springer |
| publikationsjahr_anzeige | 1991 |
| publikationsjahr_facette | 1991 |
| publikationsjahr_intervall | 8009:1990-1994 |
| publikationsjahr_sort | 1991 |
| publisher | Springer |
| reference | 15 (1991), S. 263-266 |
| schlagwort | computer assistance contact lens corneal physiology high Dk material keratoconus |
| search_space | articles |
| shingle_author_1 | Kok, J. H. C. Cheng, K. H. |
| shingle_author_2 | Kok, J. H. C. Cheng, K. H. |
| shingle_author_3 | Kok, J. H. C. Cheng, K. H. |
| shingle_author_4 | Kok, J. H. C. Cheng, K. H. |
| shingle_catch_all_1 | Kok, J. H. C. Cheng, K. H. Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses computer assistance contact lens corneal physiology high Dk material keratoconus computer assistance contact lens corneal physiology high Dk material keratoconus Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications. 1573-2630 15732630 Springer |
| shingle_catch_all_2 | Kok, J. H. C. Cheng, K. H. Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses computer assistance contact lens corneal physiology high Dk material keratoconus computer assistance contact lens corneal physiology high Dk material keratoconus Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications. 1573-2630 15732630 Springer |
| shingle_catch_all_3 | Kok, J. H. C. Cheng, K. H. Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses computer assistance contact lens corneal physiology high Dk material keratoconus computer assistance contact lens corneal physiology high Dk material keratoconus Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications. 1573-2630 15732630 Springer |
| shingle_catch_all_4 | Kok, J. H. C. Cheng, K. H. Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses computer assistance contact lens corneal physiology high Dk material keratoconus computer assistance contact lens corneal physiology high Dk material keratoconus Abstract Keratoconus is a condition in which the cornea assumes a complex irregular curvature caused by central corneal thinning. The abnormal topography of the cornea in combination with central corneal scarring results in an impaired visual acuity. Even in mild cases spectacles do not correct vision adequately. The use of hard contact lenses with a spherical geometry in the past has already given a marked therapeutic improvement. The use of these lenses however, is complicated by hypoxia and mechanical trauma of the cornea. These complications could theoretically be avoided by fitting elliptical lenses with a high oxygen transmission. To investigate this hypothesis we compared low oxygen-permeable spherical lenses with high oxygen-permeable elliptical contact lenses in a group of twenty patients with mild keratoconus. Our results showed both a marked subjective and objective visual improvement after fitting elliptical lenses with a low incidence of complications. 1573-2630 15732630 Springer |
| shingle_title_1 | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| shingle_title_2 | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| shingle_title_3 | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| shingle_title_4 | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| sigel_instance_filter | dkfz geomar wilbert ipn albert fhp |
| source_archive | Springer Online Journal Archives 1860-2000 |
| timestamp | 2024-05-06T09:55:31.938Z |
| titel | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| titel_suche | Improvement of visual acuity and corneal physiology in keratoconus by fitting aspherical, high oxygen-permeable contact lenses |
| topic | WW-YZ |
| uid | nat_lic_papers_NLM194443515 |