What question did this study set out to answer?

The study aims to evaluate the differences between predicted and measured residual astigmatism in eyes fitted with corneal contact lenses.

February 19, 2026

Corneal Toricity and Predicted Residual Astigmatism

Key Points

The study aims to evaluate the differences between predicted and measured residual astigmatism in eyes fitted with corneal contact lenses.
Analyzed 113 eyes adapted to corneal contact lenses.
Compared predicted vs. measured residual astigmatism based on corneal toricity.
Examined data across different types of corneal toricity.
Measured residual astigmatism was consistently less than predicted.
For with-the-rule corneas with 0.75 D or more toricity, the difference reached up to 0.25 D.

Abstract

Predicted vs. measured residual astigmatism for 113 eyes adapted to corneal contact lenses was analyzed on the basis of corneal toricity. For all types of corneal toricity, measured was less than predicted astigmatism by small amounts. Only for with‐the‐rule corneas of 0.75 D or more toricity did the measured differ from predicted residual astigmatism by as much as 0.25 D.

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Cite This Study

William D. Dellande (Wed,) studied this question.

synapsesocial.com/papers/6996a82decb39a600b3eea86 https://doi.org/https://doi.org/10.1002/j.2330-9474.1971.tb04262.x

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