Corneal Edema for Daily Wear of Soft Contact Lenses of High and Low Transmissibility

Abstract

<em><strong>Objective:</strong></em> To determine the behavior in corneal thickness during 30 days using high and low lens transmissibility (Dk/t). <em><strong>Materials and methods:</strong></em> 26 eyes of 13 non contact lens wearers were studied. On the right eye, a high Dk lens was adapted, lotrafilcon A and in the left eye a low Dk lens, vasurfilcon A, for 30 days in daily use. Before adaptation, the corneal thickness was measured with the Oculus Pentacam, the test was repeated on the first day within 4 and 8 hours and then within 3, 8, 15, 20, 25 and 30 days. In each control, the corneal thickness was measured after 6 hours of use. The Anova test was used, as well as the Student’s t test and the Pearson correlation coefficient. <em><strong>Results:</strong></em> During daily use for 30 days with lotrafilcon A, significant differences (p<0.05) in edema (0.76 ± 2.05 %) were found within 8 days of use. With vasurfilcon A, increment occurred after 4 hours of use, being statistically significant (p<0.05), edema (1.27 ± 1.64) within 3 days of use. anova showed significant differences (p<0.05) in the percentage of edema during the month ofuse of each type of lens, but not in the intergroup variance (p>0.05). <em><strong>Conclusion:</strong></em> The lotrafilcon A and vasurfilcon A lenses in daily use did not induce significant changes in corneal thickness, with edemas lower than 2 %.