title: Assessing the effect of colored filters on glare sensitivity of post refractive surgery patients.
abstract: OBJECTIVE
  The use of colored filters is one recommended way for patients to reduce glare. This study assessed the effect of colored filters for reducing glare symptoms in post refractive surgery patients.
  
  
  METHODS
  Log MAR visual acuity was determined in 70 participants (140 eyes) who had undergone PRK refractive surgery using three colored filters (Yellow, Green, and Red) in different light conditions.
  
  
  RESULTS
  Measured visual acuity was significantly reduced with red and green filters in glare and nonglare conditions when compared to its measurement without a filter. An asymmetrical light condition also revealed a significant difference in the visual acuity of the right and left eye when compared to each other. However, no significant differences were observed for the yellow filter in either the measured visual acuity of each eye in both light conditions or of the right and left eyes compared to each other.
  
  
  CONCLUSIONS
  Red and green filters are poor choices for reducing glare in post refractive surgery patients but a yellow filter could be used to decrease glare and improve acuity.
authors: S
authors: S
authors: Ghorbanhosseini
authors: E
authors: E
authors: Jafarzadehpur
authors: H
authors: H
authors: Hashemi
authors: A
authors: A
authors: Mirzajani
authors: M
authors: M
authors: Khabazkhoob
mesh_terms: D003116:Color; D015350:Contrast Sensitivity; D005260:Female; D005374:Filtration / Q000295:instrumentation; D019466:Glare; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D018903:Photorefractive Keratectomy / Q000009:adverse effects*; D014792:Visual Acuity