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Corneal power and astigmatism.

I K Kragha

    Annals of Ophthalmology
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    This study on corneal power and astigmatism in Nigerian patients found average corneal power around 43 diopters and low astigmatism. Findings suggest nutrition may have a lesser impact on corneal astigmatism than previously thought.

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    Area of Science:

    • Ophthalmology
    • Optometry
    • Corneal Physiology

    Background:

    • Corneal power and astigmatism are key refractive parameters.
    • Understanding ethnic variations in corneal properties is crucial for optometric practice.
    • Previous research has suggested a role for nutrition in corneal health.

    Purpose of the Study:

    • To investigate the corneal power and degree of astigmatism in a Nigerian population.
    • To explore potential differences in corneal properties based on sex.
    • To evaluate the influence of nutrition on corneal astigmatism.

    Main Methods:

    • A cross-sectional study involving 520 patients at a university optometry clinic.
    • Measurement of corneal power and astigmatism using standard optometric equipment.

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  • Statistical analysis to compare corneal properties between sexes and assess correlations.

    • Main Results:

    • Mean low corneal power was 42.7 +/- 1.5 diopters; mean high corneal power was 43.3 +/- 1.5 diopters.
    • Mean corneal astigmatism was 0.61 +/- 0.63 diopters.
    • Female corneas were significantly steeper than male corneas, but astigmatism did not differ significantly by sex.

    Conclusions:

    • The study provides normative data for corneal power and astigmatism in this Nigerian cohort.
    • Corneal astigmatism appears independent of sex in this population.
    • The findings question the significant role of nutrition in corneal astigmatism, contrary to some prior hypotheses.