title: Comparison between refraction measured by Spot Vision Screening™ and subjective clinical refractometry.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the accuracy of Spot Vision Screening™ as an autorefractor by comparing refraction measurements to subjective clinical refractometry results in children and adult patients.
  
  
  METHODS
  One-hundred and thirty-four eyes of 134 patients were submitted to refractometry by Spot and clinical refractometry under cycloplegia. Patients, students, physicians, staff and children of staff from the Hospital das Clínicas (School of Medicine, University of São Paulo) aged 7-50 years without signs of ocular disease were examined. Only right-eye refraction data were analyzed. The findings were converted in magnitude vectors for analysis.
  
  
  RESULTS
  The difference between Spot Vision Screening™ and subjective clinical refractometry expressed in spherical equivalents was +0.66±0.56 diopters (D), +0.16±0.27 D for the vector projected on the 90 axis and +0.02±0.15 D for the oblique vector.
  
  
  CONCLUSIONS
  Despite the statistical significance of the difference between the two methods, we consider the difference non-relevant in a clinical setting, supporting the use of Spot Vision Screening™ as an ancillary method for estimating refraction.
authors.affiliation: Disciplina de Oftalmologia e Otorrinolaringologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo/, SP, Brazil.
authors.forename: Daniela Lima
authors.initials: DL
authors.lastname: de Jesus
authors.affiliation: Disciplina de Oftalmologia e Otorrinolaringologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo/, SP, Brazil.
authors.forename: Flávio Fernandes
authors.initials: FF
authors.lastname: Villela
authors.affiliation: Disciplina de Oftalmologia e Otorrinolaringologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo/, SP, Brazil.
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Orlandin
authors.affiliation: Disciplina de Oftalmologia e Otorrinolaringologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo/, SP, Brazil.
authors.forename: Fernando Naves
authors.initials: FN
authors.lastname: Eiji
authors.affiliation: Departamento de Computação, Universidade Federal de Sergipe, São Cristóvão/, SE, Brazil.
authors.forename: Daniel Oliveira
authors.initials: DO
authors.lastname: Dantas
authors.affiliation: Disciplina de Oftalmologia e Otorrinolaringologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo/, SP, Brazil.
authors.forename: Milton Ruiz
authors.initials: MR
authors.lastname: Alves
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis*; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods; D055815:Young Adult