title: Nitric oxide levels in tears of patients with mild forms of papillary conjunctivitis induced by rigid gas-permeable contact lenses.
abstract: OBJECTIVE
  To determine whether nitric oxide (NO) is detectable in the tear fluid of patients with mild forms of papillary conjunctivitis who wear rigid gas-permeable contact lenses.
  
  
  METHODS
  Tear samples were taken from 12 users of rigid gas-permeable contact lenses and 12 healthy controls. Samples were analyzed, and the levels of NO were determined.
  
  
  RESULTS
  The mean level of NO in those who wore contact lenses was 118.98 micromol/L (95% CI: 91.85-146.10 micromol/L); whereas the level of NO found in the control subjects was 114.84 micromol/L (95% CI: 102.54-127.14 micromol/L). The difference was statistically insignificant (P>0.05).
  
  
  CONCLUSIONS
  Nitric oxide levels in the tear fluid of rigid gas-permeable contact lens users did not correlate with the presence of mild symptoms of papillary conjunctivitis.
authors.affiliation: Department of Ophthalmology, Erciyes University Faculty of Medicine, Kayseri, Turkey. sarper2002@yahoo.com
authors.forename: Sarper
authors.initials: S
authors.lastname: Karaküçük
authors.forename: G Ertuğrul
authors.initials: GE
authors.lastname: Mirza
authors.forename: Inci
authors.initials: I
authors.lastname: Karaküçük
authors.forename: Ali
authors.initials: A
authors.lastname: Akal
authors.forename: Mustafa
authors.initials: M
authors.lastname: Er
mesh_terms: D000293:Adolescent; D000328:Adult; D003233:Conjunctivitis, Allergic / Q000209:etiology / Q000378:metabolism*; D003261:Contact Lenses / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D009569:Nitric Oxide / Q000378:metabolism*; D013666:Tears / Q000378:metabolism*
chemical_list: D009569:Nitric Oxide