Katz J I, Kaufman H E, Breslin C, Katz I M
Ophthalmology. 1978 Aug;85(8):787-93. doi: 10.1016/s0161-6420(78)35611-6.
The slow-release artificial tear (SRAT) is a biodegradable, cellulosic polymer without preservative which is inserted beneath the tarsus of the lower lid, and which provides continuous lubrication and tear film stability to the eye. The SR-AT has been shown to reduce both subjective symptoms and objective signs in patients with keratitis sicca, and is a valuable adjunct to therapy in patients with this disease.