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Central corneal thickness in high myopia.

Lene Pedersen1, Jesper Hjortdal, Niels Ehlers

  • 1Department of Ophthalmology, Aarhus University Hospital, Arhus Sygehus, Arhus, Denmark. lenep74@hotmail.com

Acta Ophthalmologica Scandinavica
|September 29, 2005
PubMed
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Central corneal thickness (CCT) was similar in individuals with emmetropia and high myopia. This suggests that myopia progression does not significantly alter the central cornea.

Area of Science:

  • Ophthalmology
  • Optometry
  • Corneal Physiology

Background:

  • Central corneal thickness (CCT) is a key ocular biometric parameter.
  • Variations in CCT can influence intraocular pressure measurements and refractive error.
  • Understanding CCT in different refractive states is crucial for accurate eye health assessment.

Purpose of the Study:

  • To investigate potential differences in CCT between emmetropic and high myopic individuals.
  • To determine if high myopia is associated with a systematically altered central cornea.

Main Methods:

  • A comparative study involving 57 emmetropic subjects and 48 high myopic subjects.
  • Central corneal thickness was measured using a Haag-Streit Optical Low-Coherence Reflectometry (OLCR) pachymeter.

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  • High precision pachymetry with a standard deviation of 1 micrometer for repeated measurements was employed.

    • Main Results:

    • The mean CCT for emmetropes was 538.6 micrometers (SD = 32.1).
    • The mean CCT for high myopes was 527.7 micrometers (SD = 35.0).
    • No statistically significant difference was found in mean CCT or variance between the two groups (p > 0.05).

    Conclusions:

    • Central corneal thickness is not systematically altered in individuals with high myopia.
    • The progression of myopia does not appear to influence the central cornea to a measurable degree.