Contact lens wear in dry environments

Acta Ophthalmol (Copenh). 1986 Apr;64(2):221-5. doi: 10.1111/j.1755-3768.1986.tb06904.x.


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 (less than about 30%) showed significantly shorter BUT on the lens and more prominent lens deposits than subjects in a higher relative humidity (greater than 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 less than 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.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Age Factors
  • Climate*
  • Contact Lenses, Hydrophilic / adverse effects*
  • Female
  • Humans
  • Humidity*
  • Light
  • Male
  • Microclimate*
  • Sex Factors
  • Temperature
  • Time Factors