title: [Assessment of a 3D digital orthoptic test platform].
abstract: OBJECTIVE
  To compare standard orthoptic tests with a novel digital 3D orthoptic platform, 3DeltaEasy(©) from Orthoptica(®).
  
  
  METHODS
  This study tests the 3D digital orthoptics platform, 3DeltaEasy(©) from Orthoptica(®) and compares it to the corresponding standard orthoptic tests. This platform consists of a computer equipped with dedicated software, a video projector and 3D liquid crystal glasses. Three tests were compared: Wirt test, measurement of horizontal and vertical phorias, and the horizontal fusional amplitude in convergence and divergence. A total of 102 subjects, 53 males (52 %) and 49 females (48 %), aged between 9 years and 72 years (mean age 33±16.4 years) were examined at the ophthalmologic department of the Brest Hospital (France) and included in this observational cross-sectional study. Subjects recruited in this study were patients requiring orthoptic screening or therapy. Patients without their optimal visual corrections were excluded. All patients underwent both ophthalmological and orthoptic examination including Wirt fly stereotest with polarizing spectacles, cover tests to evaluate and measure the horizontal and vertical deviation of the lines of sight, horizontal vergence ranges using prism bar and their equivalent tests implemented in the digital 3D orthoptic tests 3DeltaEasy(©) from Orthoptica(®).
  
  
  RESULTS
  All data were processed using MedCalc Statistical Software version 14.12.0 (MedCalc Software bvba, Ostend, Belgium). The main result of this study is that 3DeltaEasy(©) and the classical Wirt test are correlated (Spearman's coefficient of rank correlation: ρ=0.74; P<0.0001), cover tests are equivalent for intermediate and far vision (paired t-test; P=0.46 and P=0.51), and horizontal and vertical vergence range are comparable for distance vision (paired t-test; P=0.34 and P=0.94).
  
  
  CONCLUSIONS
  New digital 3D tools could easily substitute for some orthoptic tests with better ergonomics. Eventually, by increasing the number of tests performed, it could substitute for nearly all tests.
authors.affiliation: Université de Bretagne occidentale, 3, rue des Archives, CS 93837, 29238 Brest cedex 3, France; LaTIM-Inserm UMR 1101, laboratoire de traitement de l'information médicale, Bat 1, CHU Morvan, 29609 Brest cedex, France. Electronic address: mathieu.lamard@univ-brest.fr.
authors.forename: M
authors.initials: M
authors.lastname: Lamard
authors.affiliation: LaTIM-Inserm UMR 1101, laboratoire de traitement de l'information médicale, Bat 1, CHU Morvan, 29609 Brest cedex, France; Télécom Bretagne, CS 83818, 29238 Brest cedex 3, France.
authors.forename: S
authors.initials: S
authors.lastname: Ferragut
authors.affiliation: Service d'ophtalmologie, centre hospitalier régional universitaire, 5, avenue Foch, 29609 Brest cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Hugny-Larroque
authors.affiliation: Télécom Bretagne, CS 83818, 29238 Brest cedex 3, France.
authors.forename: J-L
authors.initials: JL
authors.lastname: De Bougrenet De La Tocnaye
authors.affiliation: Université de Bretagne occidentale, 3, rue des Archives, CS 93837, 29238 Brest cedex 3, France; LaTIM-Inserm UMR 1101, laboratoire de traitement de l'information médicale, Bat 1, CHU Morvan, 29609 Brest cedex, France; Service d'ophtalmologie, centre hospitalier régional universitaire, 5, avenue Foch, 29609 Brest cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Cochener
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003290:Convergence, Ocular; D003430:Cross-Sectional Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods; D008875:Middle Aged; D009988:Orthoptics / Q000295:instrumentation* / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013285:Strabismus / Q000628:therapy; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods*; D015348:Vision, Binocular / Q000502:physiology*; D055815:Young Adult
keywords: 3D platform; Binocular vision; Orthoptic test; Plateforme 3D; Tests orthoptiques; Vision binoculaire