The Effect of Lifting the Lids on Corneal Astigmatism

Corneal toricity was measured using a kera-tometer with the lids in the normal position, and with the lids retracted. Lid retraction usually changed the measured toricity. In corneas with more than 1.00 D of with-the-rule astigmatism, the change was in the direction of less with-the-rule astigmatism. In corneas with astigmatism between 1 D with-the-rule and 1 D against-the-rule, the change was not systematic. The results compare with the...