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Delayed visual maturation: ophthalmic and neurodevelopmental aspects.

J Tresidder1, A R Fielder, J Nicholson

  • 1University of Leicester.

Developmental Medicine and Child Neurology
|October 1, 1990
PubMed
Summary
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Delayed visual maturation (DVM) in infants, especially when presenting as blindness, is linked to an excellent neurodevelopmental outlook. This suggests potential recovery and emergence of visual system function.

Area of Science:

  • Ophthalmology
  • Neurodevelopmental Pediatrics
  • Visual System Development

Background:

  • Delayed visual maturation (DVM) presents in various forms, from isolated anomalies to those compounded by perinatal issues, neurodevelopmental delay, or ocular anomalies like nystagmus.
  • DVM classification includes type 1A (isolated), type 1B (perinatal problems), type 2 (neurodevelopmental delay), and type 3 (ocular anomalies/nystagmus).

Purpose of the Study:

  • To investigate the neurodevelopmental and ophthalmic characteristics of infants diagnosed with DVM.
  • To quantitatively assess visual improvement, visual acuity acquisition, and long-term outcomes in infants with DVM.
  • To explore the potential relationship between DVM presentation and the development of the visual system.

Main Methods:

  • Studied 26 infants diagnosed with DVM.

Related Experiment Videos

  • Employed an adapted acuity card procedure to quantitatively measure visual improvement and acuity.
  • Conducted neurodevelopmental assessments following the period of visual improvement.

    • Main Results:

    • Infants presenting with blindness due to DVM showed an excellent neurodevelopmental outlook.
    • Visual improvement onset, rate of visual acuity acquisition, and final outcomes were quantitatively analyzed.
    • Type 3 DVM, characterized by nystagmus, was observed alongside other ocular anomalies.

    Conclusions:

    • The study supports the clinical observation that DVM presenting as blindness has a favorable neurodevelopmental prognosis.
    • DVM may indicate a defect within the extrageniculostriate visual system.
    • The emergence of vision and nystagmus in DVM could signify the developing function of the geniculostriate pathway.