Error analysis identifies how corneal thickness measurements vary with changes in optical parameters, indicating implications for accuracy.
Optical devices used to measure thickness are based on specific radii of curvature and indices of refraction. Variations in anterior corneal radii produce negligible changes in the apparent comeal thickness, but changes in the index of refraction cause the cornea to appear thicker or thinner than it actually is.
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Arner et al. (1972) studied this question.
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