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VARIATIONS IN CENTRAL CORNEAL THICKNESS DURING THE FIRST YEAR OF CONTACT LENS WEAR
Author(s) -
HØVDING GUNNAR
Publication year - 1982
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1982.tb05782.x
Subject(s) - ophthalmology , contact lens , lens (geology) , effects of long term contact lens wear on the cornea , medicine , swelling , cornea , silicone hydrogel , biology , pathology , paleontology
Variations in central corneal thickness during the first year of hard, hydro‐philic or silicone lens wear are reported. The mean corneal swelling after 1/2, 3 and 6 months was 4.7‐3.0% in the first 2 groups ( P < 0.001 ‐ P = 0.005), but only 1.3‐0.8% in the latter group ( P = 0.011 ‐ 0.050). These differences were statistically significant ( P < 0.001 ‐ P = 0.046) and are ascribed to a higher oxygen tension under the silicone lenses. An over‐all reduction of corneal oedema was noted after 1/2 month ( P = 0.025). One year after lens fitting a similar and not significant corneal swelling was found in the 3 lens groups. In addition to an initial ‘osmotic’ adaptation our results indicate that a further corneal adaptation to hard and hydrophilic lenses may take place between 6 and 12 months after lens fitting. Development of lens intolerance was not correlated to the degree of corneal oedema after 1/2 month of lens wear.