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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
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Related Experiment Video

Updated: May 19, 2026

How to Obtain Reliable Visual Event-related Potentials in Newborns
07:39

How to Obtain Reliable Visual Event-related Potentials in Newborns

Published on: October 24, 2019

Delayed visual maturation in otherwise normal infants.

Roua Azmeh1, Gregg T Lueder

  • 1Department of Ophthalmology and Visual Sciences and Pediatrics, St Louis Children's Hospital, Washington University School of Medicine, St Louis, MO 63110, USA.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|August 28, 2012
PubMed
Summary
This summary is machine-generated.

Otherwise healthy infants with decreased visual responsiveness have a good prognosis. Key indicators for a positive outcome include light reaction, normal pupils, no nystagmus, and no structural eye issues.

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Area of Science:

  • Ophthalmology
  • Pediatric Medicine
  • Developmental Pediatrics

Background:

  • Infants may exhibit decreased visual responsiveness, often linked to systemic or ocular issues.
  • A subset of these infants presents without identifiable medical or ocular problems.

Purpose of the Study:

  • To evaluate prognostic factors for decreased visual responsiveness in otherwise normal infants.
  • To determine predictors of visual acuity and developmental status in this specific pediatric population.

Main Methods:

  • Retrospective cohort study of infants evaluated for decreased visual responsiveness.
  • Inclusion criteria: no premature birth or systemic issues; exclusion: lack of follow-up.
  • Prognostic indicators: light reaction, pupil response, nystagmus, ocular structure; outcomes: visual acuity, development.

Main Results:

  • Thirty-two infants met study criteria; follow-up ranged from 3 months to 11 years.
  • One patient developed strabismus requiring surgery.
  • The majority of patients demonstrated normal vision and development.

Conclusions:

  • Otherwise normal infants with decreased visual responsiveness have a favorable prognosis when specific ocular findings are present.
  • Normal vision and development are expected outcomes for these infants.
  • No additional testing is indicated at initial evaluation if key prognostic factors are met.