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Aqueous humor ascorbate concentration and open-angle glaucoma

P Lee, K W Lam, M Lai

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |February 1, 1977
    PubMed
    Summary
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    This study found that aqueous ascorbate levels are generally not deficient in open-angle glaucoma patients. Ascorbate supplementation is unlikely to benefit primary open-angle glaucoma management.

    Area of Science:

    • Ophthalmology
    • Biochemistry
    • Glaucoma Research

    Background:

    • Open-angle glaucoma is a leading cause of irreversible blindness worldwide.
    • The role of ascorbate (vitamin C) in ocular health and glaucoma pathogenesis is not fully understood.
    • Previous research has yielded conflicting results regarding ascorbate levels in glaucoma patients.

    Purpose of the Study:

    • To investigate aqueous humor ascorbate concentrations in patients with open-angle glaucoma.
    • To determine if ascorbate deficiency is a contributing factor in primary open-angle glaucoma.
    • To evaluate the potential therapeutic value of ascorbate in managing open-angle glaucoma.

    Main Methods:

    • Aqueous humor samples were collected from 35 patients diagnosed with open-angle glaucoma.

    Related Experiment Videos

  • Aqueous ascorbate concentrations were measured using a standardized biochemical assay.
  • Data were compared to normative values and to a small cohort of cataract patients.

    • Main Results:

    • The mean aqueous ascorbate concentration in open-angle glaucoma patients was 22.4 +/- 12.9 mg/100 ml.
    • This level is not indicative of a significant ascorbate deficiency in the majority of glaucoma eyes.
    • Aqueous ascorbate levels in glaucoma patients showed considerable variation, potentially linked to trabecular meshwork function.

    Conclusions:

    • The findings suggest that ascorbate deficiency is not a primary characteristic of open-angle glaucoma.
    • Ascorbate supplementation is unlikely to offer therapeutic benefits for primary open-angle glaucoma.
    • Variations in aqueous ascorbate may reflect factors affecting aqueous outflow rather than ciliary body metabolism.