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Homocysteine, folates, and the eye

A D Wright1, N Martin, P M Dodson

  • 1Department Ophthalmology, Birmingham Heartlands Hospital, Birmingham, UK.

Eye (London, England)
|December 8, 2007
PubMed

Insights

Elevated plasma homocysteine is a risk factor for vascular and eye diseases. Folic acid may help prevent stroke and cognitive decline, with ongoing research for retinal vascular disease prevention.

Area of Science:

  • Ophthalmology
  • Neurology
  • Cardiovascular Medicine

Background:

  • Elevated plasma homocysteine is a recognized risk factor for arterial disease, including retinal artery and vein occlusions.
  • The efficacy of folic acid in preventing vascular disease progression remains under investigation.
  • While secondary prevention of coronary artery disease with folic acid has shown limited success, primary prevention of stroke and cognitive decline appears promising.

Purpose of the Study:

  • To evaluate the role of plasma homocysteine in vascular and eye diseases.
  • To assess the effectiveness of folic acid supplementation in preventing vascular events.
  • To discuss the implications of homocysteine reduction for retinovascular disease and public health initiatives like flour fortification.

Main Methods:

  • Review of existing clinical trials and epidemiological data on plasma homocysteine levels and vascular disease.
  • Analysis of outcomes from studies investigating folic acid supplementation for primary and secondary prevention of vascular and neurological conditions.
  • Consideration of public health strategies, such as flour fortification, in relation to homocysteine levels and disease prevention.

Main Results:

  • Plasma homocysteine is linked to arterial disease and occlusive events in the eye.
  • Folic acid treatment has not definitively proven effective for secondary prevention of vascular disease, but shows promise in primary stroke and cognitive function prevention.
  • Further data are needed, but homocysteine measurement and reduction are suggested for retinovascular disease.

Conclusions:

  • Plasma homocysteine is a significant risk factor for vascular and ocular diseases.
  • Folic acid supplementation shows potential for primary prevention of stroke and cognitive impairment, and is suggested for secondary prevention in retinovascular disease.
  • Ongoing debates regarding flour fortification highlight the broader public health implications of managing homocysteine levels for vascular and neural tube defect prevention.

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