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Neonatal Hypoglycaemia and Visual Development: A Review
Nabin Paudel1, Arijit Chakraborty, Nicola Anstice
1School of Optometry and Vision Science, The University of Auckland, Auckland, New Zealand.
Insights
Neonatal hypoglycaemia (NH) in newborns does not clearly impact eye or optic nerve development. Current research indicates no definitive link between NH and visual dysfunction, though effects in later childhood remain unknown.
Area of Science:
- Pediatric Neurology
- Ophthalmology
- Developmental Neuroscience
Background:
- Neonatal hypoglycaemia (NH) affects many newborns, posing potential risks to developing visual pathways.
- The occipital lobes, crucial for vision, may be vulnerable to NH-induced injury.
- Case studies suggest NH might influence eye and optic nerve development.
Purpose of the Study:
- To comprehensively review existing literature on the impact of neonatal hypoglycaemia on the visual system.
- To synthesize current evidence regarding NH's effects on visual development from infancy through childhood.
Main Methods:
- Systematic literature search across major databases: PubMed, Embase, Medline, and Google Scholar.
- Utilized prespecified Medical Subject Headings (MeSH) terms for targeted information retrieval.
- Analysis of findings from case series and large-scale prospective studies.
Main Results:
- No conclusive evidence was found linking NH to impaired eye or optic nerve development.
- Occipital lobe injuries in NH cases often co-occurred with other conditions, complicating direct links to visual dysfunction.
- A large prospective study found no adverse effects of mild-to-moderate NH on visual development by age 2.
Conclusions:
- The precise impact of neonatal hypoglycaemia on visual development remains uncertain.
- Further research is needed to determine if NH affects visual function in mid-to-late childhood.
- Longitudinal studies are essential to understand visual development outcomes in children with a history of NH.
Background:
Many newborn babies experience low blood glucose concentrations, a condition referred to as neonatal hypoglycaemia (NH). The effect of NH on visual development in infancy and childhood is of interest because the occipital lobes, which include the primary visual cortex and a number of extrastriate visual areas, may be particularly susceptible to NH-induced injury. In addition, a number of case series have suggested that NH can affect eye and optic nerve development.
Objective:
To review the existing literature concerning the effect of NH on the visual system.
Methods:
A PubMed, Embase, Medline, and Google Scholar literature search was conducted using prespecified MeSH terms.
Results:
The literature reviewed revealed no clear evidence for an effect of NH on the development of the eye and optic nerve. Furthermore, occipital and occipital-parietal lobe injuries following NH often occurred in conjunction with comorbid conditions and were not clearly linked to subsequent visual dysfunction, possibly due to difficulties in measuring vision in young children and a lack of studies at older ages. A recent, large-scale, prospective study of NH outcomes at 2 years of age found no effect of mild-to-moderate NH on visual development.
Conclusion:
The effect of NH on visual development is unclear. It is currently unknown whether NH affects visual function in mid-to-late childhood when many visual functions reach adult levels.
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