title: Testability of the Retinomax autorefractor and IOLMaster in preschool children: the Multi-ethnic Pediatric Eye Disease Study.
abstract: OBJECTIVE
  To determine the testability of Retinomax and IOLMaster ocular biometry in preschool children.
  
  
  METHODS
  Population-based study of inner city preschool children in Los Angeles County.
  
  
  METHODS
  Two thousand five hundred forty-five Hispanic and 2178 African American children 6 to 72 months old.
  
  
  METHODS
  Subjects were identified by door-to-door screening within previously identified contiguous census tracts. Pediatric ophthalmologists or optometrists performed comprehensive eye examinations on all subjects. Refractive error and keratometry measurements were attempted on all subjects with the Retinomax autorefractor after cycloplegia. Axial length measurements with the IOLMaster partial coherence interferometer were attempted on those subjects ages 30 to 72 months.
  
  
  METHODS
  Ability to obtain high confidence autorefraction readings or axial length measurements on both eyes.
  
  
  RESULTS
  Overall, 89% were testable in both eyes with the Retinomax device, and 91% of the children were testable with the IOLMaster. Testability rose sharply with age, so that by age 36 months 98% of children were testable with the Retinomax device and 90% were testable with IOLMaster. There were no consistent gender- or ethnicity-related differences in testability overall or when stratified by age for either device.
  
  
  CONCLUSIONS
  Young children can be reliably tested for ocular biometry with the Retinomax and IOLMaster devices. This may impact strategies for management of cataracts and refractive errors in preschool children.
authors.affiliation: Doheny Eye Institute and Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033-9224, USA. rvarma@usc.edu
authors.forename: Mark
authors.initials: M
authors.lastname: Borchert
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Kristina
authors.initials: K
authors.lastname: Tarczy-Hornoch
authors.forename: Susan
authors.initials: S
authors.lastname: Cotter
authors.forename: Jennifer
authors.initials: J
authors.lastname: Deneen
authors.forename: Stanley
authors.initials: S
authors.lastname: Azen
authors.forename: Rohit
authors.initials: R
authors.lastname: Varma
mesh_terms: D001741:Black or African American / Q000208:ethnology; D000550:Amblyopia / Q000175:diagnosis* / Q000208:ethnology; D001699:Biometry; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006630:Hispanic or Latino / Q000208:ethnology; D006801:Humans; D007223:Infant; D007368:Interferometry / Q000379:methods; D015141:Los Angeles; D008297:Male; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis* / Q000208:ethnology; D015203:Reproducibility of Results; D013285:Strabismus / Q000175:diagnosis* / Q000208:ethnology; D015351:Vision Screening / Q000295:instrumentation*