title: Increased concentration of hyaluronan in tears after soaking contact lenses in Biotrue multipurpose solution.
abstract: OBJECTIVE
  This study was conducted to determine 1) the concentration of hyaluronan (HA) in the tear films of contact lens (CL) wearers versus non-CL wearers and 2) whether HA sorbed from Biotrue, an HA-containing multipurpose solution (MPS), onto senofilcon A lenses affects the concentration of HA in tears after 2 hours of wear.
  
  
  METHODS
  Tears of habitual CL wearers and non-CL wearers were collected on Schirmer strips at baseline and after 2 hours of wear of senofilcon A CLs that had first been either rinsed with Sensitive Eyes Saline or soaked in Biotrue MPS for 14 hours. HA concentrations were measured by enzyme-linked immunosorbent assay (ELISA) and adjusted for sample volumes.
  
  
  RESULTS
  No difference in baseline concentrations of HA in tears was found between CL wearers and non-CL wearers (P=0.07), nor between males and females (P=0.06). However, age was significantly negatively associated with HA concentration (P<0.01), and mostly, CL wear contributed to a significant association (P<0.01). Among saline-rinsed CL wearers, no change in HA concentration in tears was observed after 2 hours of wear (P=0.38). By contrast, a significant increase in HA concentration was observed in the tears from eyes that had worn CLs soaked in Biotrue MPS when compared to baseline (P=0.01) or to saline-rinsed control (P=0.03).
  
  
  CONCLUSIONS
  1) In this study population, no difference in baseline concentration of HA was observed between CL wearers and non-CL wearers, and 2) after 2 hours of wear of senofilcon A lenses that were soaked in Biotrue MPS, HA concentrations in the tear films of CL wearers increased.
authors: Vision Care, Bausch & Lomb Incorporated, Rochester, NY, USA.
authors: Catherine A
authors: CA
authors: Scheuer
authors: Vision Care, Bausch & Lomb Incorporated, Rochester, NY, USA.
authors: Marjorie J
authors: MJ
authors: Rah
authors: Vision Care, Bausch & Lomb Incorporated, Rochester, NY, USA.
authors: William T
authors: WT
authors: Reindel
keywords: MPS; contact lens; dry eye; hyaluronan