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Maternal alcohol consumption during pregnancy frequently causes fetal alcohol syndrome (FAS) with significant eye abnormalities in children. These include optic nerve hypoplasia and retinal vessel changes, leading to reduced vision.
Area of Science:
- Ophthalmology
- Teratology
- Developmental Biology
Background:
- Maternal alcohol abuse during pregnancy is a leading cause of preventable birth defects.
- Fetal alcohol syndrome (FAS) encompasses a range of physical, cognitive, and behavioral issues.
- Ocular abnormalities are prevalent in children with FAS, impacting vision and eye development.
Purpose of the Study:
- To review the spectrum and frequency of eye malformations in fetal alcohol syndrome.
- To highlight the typical ocular defects associated with prenatal alcohol exposure.
- To emphasize the critical developmental periods for ocular vulnerability to alcohol.
Main Methods:
- Review of existing literature on fetal alcohol syndrome and associated ocular findings.
- Analysis of reported frequencies of specific eye malformations.
- Correlation of developmental timelines with potential alcohol teratogenicity.
Main Results:
- Up to 90% of children with FAS exhibit eye abnormalities.
- Optic nerve head hypoplasia (up to 48%) and increased retinal artery tortuosity (up to 49%) are common.
- Visual acuity is frequently reduced, ranging from moderate to severe.
Conclusions:
- Prenatal alcohol exposure poses a significant risk for diverse eye malformations.
- Alcohol can adversely affect eye structures throughout gestation.
- Early and consistent intervention is crucial for managing vision impairment in affected children.
Abstract:
Maternal alcohol abuse during pregnancy causes malformations of the eyes with serious consequences to the vision of the affected children. A high percentage (up to 90%) of children suffering from the fetal alcohol syndrome have eye abnormalities, including malformation in the outer eye region, disorders of motility, and defects of different intraocular structures. Two kinds of malformations stand out as most typical--hypoplasia of the optic nervehead (up to 48%) and increased tortuosity of the retinal vessels, especially of the arteries (up to 49%). Visual acuity is often moderately or severely reduced. Considering the developmental timing of different tissues of the eye, one can presume that there is a risk for deleterious effects of alcohol on eye structures at any point of time from early gestation until development is completed.