title: Contact lens user statistics in Okada eye clinic.
abstract: OBJECTIVE
  To investigate the relationships between contact lens wearers, their lens wear, and treatment to provide correct instructions for use.
  
  
  METHODS
  A total of 55,056 consumers, who purchased contact lenses in the two institutions of Okada Eye Clinic in the 1-year period from April 1, 2002 to March 31, 2003, were analyzed with regard to age, sex, contact lens brands, treatments and lens-solution combinations purchased, and patterns of wear.
  
  
  RESULTS
  The 2-week frequent-replacement soft contact lenses were the most popular type of contact lens, and most wearers of these lenses were those in their 20s. Saline solution was the treatment purchased most often with conventional soft contact lenses. Hard contact lens wearers tended to buy treatments of the same brand as their hard contact lenses. Hydrogen peroxide was the most purchased product with the 2-week frequent-replacement soft contact lenses and multipurpose treatment the next, especially with consumers in their 20s. There were no significant sex gaps.
  
  
  CONCLUSIONS
  The survey was conducted on a wide age range of more than 50,000 people and can be assumed to accurately reflect the tendencies of contact lens wearers in Japan. The results clearly show the actual use of contact lenses and treatments of each age group and will be useful in instructing wearers to the correct use of their treatments.
authors.affiliation: Eye Clinic, Yokohama City University School of Medicine, Yokohama City, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kato
authors.forename: Hidenori
authors.initials: H
authors.lastname: Saito
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Nishizaki
authors.forename: Tomoko
authors.initials: T
authors.lastname: Shiota
authors.forename: Tomoko
authors.initials: T
authors.lastname: Matsuda
authors.forename: Nobuhisa
authors.initials: N
authors.lastname: Mizuki
authors.forename: Eiichi
authors.initials: E
authors.lastname: Okada
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D018639:Contact Lens Solutions; D003261:Contact Lenses / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D017755:Prosthesis Fitting; D017678:Sex Distribution
chemical_list: D018639:Contact Lens Solutions