Measurement of Corneal Sensitivity and Thickness with PMMA and Gas‐Permeable Contact Lenses
作者:
MICHEL MILLODOT,
DAVID HENSON,
DANIEL O'LEARY,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1979)
卷期:
Volume 56,
issue 10
页码: 628-632
ISSN:0093-7002
年代: 1979
出版商: OVID
关键词: corneal sensitivity;corneal thickness;PMMA contact lenses;CAB contact lenses
数据来源: OVID
摘要:
Corneal sensitivity and thickness were measured in nine subjects. Two different types of hard contact lenses were fitted to each subject; a traditional polymethylmethacrylate (PMMA) lens on one eye and a gas-permeable cellulose acetate butyrate (CAB) lens on the other eye. Corneal sensitivity did not differ significantly between the two eyes after 6 and 10 hr of wear, but PMMA lenses tended to induce slightly more corneal edema than CAB lenses. As oxygen tension behind such contact lenses is different, whereas mechanical stimulation is nearly the same, this would appear to support the view that corneal sensitivity changes are related to mechanical stimulation. However, careful scrutiny of the data does not support this view unequivocally, and other suggestions are made.
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