July 2019
Volume 60, Issue 9
Free
ARVO Annual Meeting Abstract  |   July 2019
Quantitative visual acuity measurement in young children using tablet-based optokinetic nystagmus videography
Author Affiliations & Notes
  • Monte Mills
    Ophthalmology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
    Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, United States
  • Elise Ciner
    Optometry, Salus University, Philadelphia, Pennsylvania, United States
  • Gui-shuang Ying
    Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, United States
  • Ebenezer Daniel
    Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, United States
  • E Revel Martin
    Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, United States
  • Siva Meiyeppen
    Optometry, Salus University, Philadelphia, Pennsylvania, United States
  • Elizabeth DeSouza
    Vifant, LLC, Philadelphia, Pennsylvania, United States
  • Lauren Peirish
    Optometry, Salus University, Philadelphia, Pennsylvania, United States
  • Footnotes
    Commercial Relationships   Monte Mills, Vifant, LLC (P), Vifant, LLC (I), Vifant, LLC (S); Elise Ciner, None; Gui-shuang Ying, None; Ebenezer Daniel, None; E Revel Martin, None; Siva Meiyeppen, None; Elizabeth DeSouza, Vifant LLC (I), Vifant LLC (S); Lauren Peirish, None
  • Footnotes
    Support  NSF SBIR Phase 1 Grant 1746353
Investigative Ophthalmology & Visual Science July 2019, Vol.60, 4416. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Monte Mills, Elise Ciner, Gui-shuang Ying, Ebenezer Daniel, E Revel Martin, Siva Meiyeppen, Elizabeth DeSouza, Lauren Peirish; Quantitative visual acuity measurement in young children using tablet-based optokinetic nystagmus videography. Invest. Ophthalmol. Vis. Sci. 2019;60(9):4416.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose : Quantitative measurement of visual acuity in young children can be challenging, but is important for detecting early childhood vision abnormalities. Optokinetic nystagmus (OKN) is present in very young children. The purpose of this pilot study is to demonstrate the feasibility of a custom software app (Vifant OKN) using a consumer-grade tablet computer for quantitative assessment of resolution acuity by OKN in young children.

Methods : Nine children with normal eye exams and normal visual development, from 9 to 40 months of age (mean 17.6 months), were tested with the Vifant OKN app binocularly and then monocularly. The visual target consisted of black and white gratings varying in 5 increments from 0.2 - 2.4 cycles per degree (CPD), at a rate of 10 degrees per second at 44 cm. The gratings were presented for 3 seconds each, sequentially from lowest to highest frequency with a short animation presented between each increment to help maintain attention.
Trained video image readers graded videos taken from each testing period, counting the number of pursuit and saccadic eye movements, blinks, head movements and inattention.

Results : All 9 subjects demonstrated gradable binocular and monocular eye movements. Eight of 9 subjects binocularly and 5 of 9 monocularly demonstrated pursuit and saccadic movements at the highest frequency measured (2.4 CPD). Blinks and head movements were similar in binocular and monocular tests and did not interfere with detection of saccadic or pursuit movements. Inattention was more frequent with monocular testing.

Conclusions : Quantitative measurement of resolution visual acuity in young children with OKN response is feasible using a consumer-grade tablet computer and a custom app (Vifant OKN), with trained graders interpretation of video recordings of eye movements. OKN responses are detected with 3 second intervals of kinetic gratings under both binocular and monocular conditions. Inattention was more frequent with monocular testing, and maximal resolution was better with binocular testing.
Incorporation of automated eye tracking may allow automated, real-time visual acuity measurement in pre-verbal and verbal young children.

This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×