Premium
Contact lens wear in dry environments
Author(s) -
Nilsson Sven Erik G.,
Andersson Lennart
Publication year - 1986
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.1755-3768.1986.tb06904.x
Subject(s) - lens (geology) , relative humidity , contact lens , humidity , optometry , ophthalmology , optics , materials science , medicine , meteorology , geography , physics
The relation between relative humidity at the place of work and subjective discomfort as well as a number of objective parameters was studied in 34 contact lens wearers. Subjects in a low relative humidity (< about 30%) showed significantly shorter BUT on the lens and more prominent lens deposits than subjects in a higher relative humidity (> 40%). A short BUT on the lens was associated with lens deposits (and vice versa) and restricted lens movements. Discomfort was particularly prominent when humidity was less than about 25%, when BUT on the lens was < 20 sec, and when lens deposits were present. An experiment where relative humidity was manipulated between about 20 and 50% showed that subjects with a short BUT on the lens and prominent lens deposits were much more sensitive to a low relative humidity than other subjects. Enzymatic cleaners, frequent lens replacements, and loose fits were valuable to lessen discomfort.