collagen photocrosslinking On the Use of Optical Clearing in Strengthening the Sclera by Collagen Photocrosslinking Authors: Shvachkina M. E., Pravdin A. B. In the paper, the first evaluation results on the effect of optical clearing on the efficiency of the technique of eye sclera strengthening through the formation of riboflavin / ultraviolet collagen photocrosslinks are presented.