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Vision01:24

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Related Experiment Video

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Subjective Refraction Test Using a Smartphone for Vision Screening
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Implementing a School Vision Screening Program in Botswana Using Smartphone Technology.

Tomas Andersen1, Maipelo Jeremiah2, Keitumetse Thamane2,3

  • 1Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.

Telemedicine Journal and E-Health : the Official Journal of the American Telemedicine Association
|February 23, 2019
PubMed
Summary
This summary is machine-generated.

Smartphone vision screening effectively identified visual impairment in Botswana schoolchildren. This mobile health approach shows promise for national eye health programs in low-resource settings.

Keywords:
BotswanaPeek Visioneye healthm-Healthtelemedicinevision screening

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Area of Science:

  • Public Health
  • Ophthalmology
  • Mobile Health Technology

Background:

  • Child eye health is a critical public health concern in low- and middle-income countries.
  • Traditional vision screening methods are often expensive and require specialized personnel.
  • Smartphone-based technologies offer a low-cost, portable alternative for vision screening.

Purpose of the Study:

  • To evaluate the implementation of smartphone-based vision screening using Peek Vision technology in Botswana schoolchildren.
  • To assess the effectiveness of mobile health in identifying and managing visual impairment in a resource-limited setting.

Main Methods:

  • The Peek Vision application was used by trained non-specialists to screen 12,877 schoolchildren in 49 schools.
  • Visual acuity <6/12 in the better eye was the threshold for visual impairment.
  • Referrals were made for optometric care, with follow-up at triage camps.

Main Results:

  • 16% of screened children were identified with visual impairment.
  • 96% of referred children attended optometry triage.
  • Spectacles were provided to 42%, medications to 5%, and further ophthalmic care to 3% of attendees.

Conclusions:

  • Comprehensive vision screening is essential for schoolchildren in Botswana.
  • Smartphone-based mobile health technology demonstrates significant potential for widespread vision screening programs in similar countries.