Jean-Paul Nutraceutical ColloRX Collagen Eye DropJean Paul Nutraceutical ColloRX Collagen Eye Drop (10ml)Aids in corneal lesion and dry eyes. Item is fragile and requires refrigeration. CORNEAL ULCERSThe cornea is the outermost layer of the eye, serving as a barrier to protect the eye from outside bacteria, chemicals and anything that can damage the eye. Corneal ulcers can be caused commonly by trauma to the eye like a scratch or puncture, or sometimes due to an infection or dry eye and entropion.