Zaheer N, et al. - In the treatment of progressive keratoconus, researchers drew a comparison between the intraoperative changes in central corneal thickness (CCT) during corneal cross-linking, using 2 different isotonic riboflavin solutions either with dextran or with hydroxy propyl methylcellulose. A significant decrease in corneal thickness was noted during cross-linking, isotonic riboflavin with dextran. On the other hand, a notable increase in corneal thickness was seen to be caused by the dextran-free isotonic riboflavin, hence facilitating the procedure.