Whiter, Brighter Eyes with Collyre Bleu by Laiter Eye Drops! Whether your eyes are brown, green or blue make them their brightest with the Original Collyre Bleu de Laiter by Leurquin Laboratories! This eye drop was created to remove the yellow in the whites of the eye. Collyre Bleu Laiter is tinted blue to make the whites actually appear brighter. The blue drops make eyes cleaner, clearer and more youthful.