Profile: Delta Life Science, Inc. designs & manufactures silicone punctum plugs and related products used by eye care specialists. Collagen plugs are designed to be inserted through the punctual opening into the canaliculus to block tear drainage through the lacrimal system. Our punctum plugs are used in the treatment of dry eye disorder. Insertion of the plug is intended to stop the outflow of tears in order to increase tear flow on the surface of the eye.