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Related Experiment Videos

Accuracy and accommodation capability of a handheld autorefractor.

W Wesemann1, B Dick

  • 1School of Optometry (HFAK), Cologne, Germany.

Journal of Cataract and Refractive Surgery
|January 26, 2000
PubMed
Summary

The Nikon Retinomax handheld autorefractor is accurate in adults but requires cycloplegia for reliable measurements in children. Without cycloplegia, 24% of pediatric measurements were overcorrected, highlighting the need for accurate refractive error assessment.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Pediatric Eye Care

Background:

  • Accurate refractive error assessment is crucial for pediatric eye health.
  • Handheld autorefractors offer potential for convenient vision screening.
  • Understanding accommodation's role in autorefraction is vital for pediatric populations.

Purpose of the Study:

  • To evaluate the measurement accuracy of the Nikon Retinomax handheld autorefractor.
  • To assess the device's effectiveness in relaxing accommodation in pediatric patients.
  • To compare handheld autorefractor readings with established methods like subjective refraction and cycloplegic retinoscopy.

Main Methods:

  • Comparative measurements were conducted on healthy young adults and children aged 2-12 years.
  • Autorefractor readings were compared against subjective refractions in adults.

Related Experiment Videos

  • Autorefractor readings were compared against cycloplegic retinoscopy in children.

    • Main Results:

    • Handheld autorefractor accuracy in adults was comparable to conventional tabletop autorefractors.
    • Pediatric autorefractor measurements were reliable when cycloplegia was administered.
    • In the absence of cycloplegia, 24% of pediatric measurements showed overcorrection exceeding -2.0 diopters.

    Conclusions:

    • Cycloplegia is frequently essential for achieving accurate autorefractor measurements in children.
    • The Nikon Retinomax demonstrates good accuracy in adults but requires specific protocols for pediatric use.
    • Careful consideration of cycloplegic agents is recommended for pediatric autorefraction.