title: Do UV-blocking Soft Contact Lenses Meet ANSI Z80.20 Criteria for UV Transmittance?
abstract: OBJECTIVE
  To compare ultraviolet (UV) ray transmission in four UV-blocking soft contact lenses with Z80.20 standards set by the American National Standards Institute (ANSI).
  
  
  METHODS
  Four soft contact lenses including Acuvue Oasys (Johnson & Johnson, Ireland), Acuvue 2 (Johnson & Johnson, Ireland), Zeiss CONTACT Day 30 (Zeiss, Germany), and Sauflon 55 UV (Sauflon, UK) were evaluated for UV transmission. One-way ANOVA testing was performed to compare mean values of UVA and UVB transmission for the contact lenses.
  
  
  RESULTS
  Acuvue Oasys, Acuvue 2, Zeiss CONTACT Day 30 and Sauflon 55 UV showed UV-B transmittance values of 0.24%, 1.46%, 10.37%, and 2.52%, respectively. Corresponding values for UV-A transmittance were 20.81%, 33.49%, 44.03% and 42.53%, respectively. One-way ANOVA showed a statistically significant difference among the tested contact lenses in terms of UV-B (P < 0.001) and UV-A (P < 0.001) transmission.
  
  
  CONCLUSIONS
  Acuvue Oasys met the ANSI criteria for UV transmission and may thus be a good choice for eye and vision care specialists and contact lens wearers seeking UV protection.
authors.affiliation: School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahmani
authors.affiliation: School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohadeseh Mohammadi
authors.initials: MM
authors.lastname: Nia
authors.affiliation: School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Alireza Akbarzadeh
authors.initials: AA
authors.lastname: Baghban
authors.affiliation: School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Nazari
authors.affiliation: School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ghassemi-Broumand
keywords: ANSI Z80.20 Standard; Spectral Transmittance; UV-blocking Contact Lens