Eiden 2007.

Methods	RCT, cross‐over design
Participants	Inclusion criteria: 18 years old or older; current SCL wearer with symptoms and/or reduced wearing time from contact lens dryness or discomfort; spherical refractive error ranged from –1.00 to –6.00 DS; refractive astigmatism between 0.75 DC and 1.50 DC Exclusion criteria: not reported
Interventions	Galyfilcon A material: silicone hydrogel replacement frequency: monthly Balafilcon A material: silicone hydrogel replacement frequency: monthly Lotrafilcon B material: silicone hydrogel replacement frequency: monthly Omafilcon B material: hydrogel replacement frequency: monthly Ocufilcon D material: hydrogel replacement frequency: monthly
Outcomes	Primary outcomes: subjective comfort subjective and objective vision measures lens fit characteristics biomicroscopy lens preference Secondary outcomes: not specified
Notes	Sponsorship source: "The study was conducted via a non‐restricted research grant from CooperVision to EyeVis Eye and Vision Research Institute" Author's name: Barry Eiden Institution: EyeVis Eye and Vision Research Institute and a private practice Comments: whether analysis accounted for cross‐over design was unclear