A graph showing no significant correlation between the magnitudes of anterior and posterior corneal astigmatism (Pearson correlation coefficient r = 0.1010, P = 0.2918) in eyes against-the-rule (ATR) anterior corneal astigmatism.

<p>A graph showing no significant correlation between the magnitudes of anterior and posterior corneal astigmatism (Pearson correlation coefficient r = 0.1010, P = 0.2918) in eyes against-the-rule (ATR) anterior corneal astigmatism.