Patented Formulations, Nanotherapeutics and Herbal Compound Applications for Dry Eye: A Review

The defining features of dry eye syndrome, a frequent tear and ocular surface multifactorial disorder, are changes in the ocular surface epithelia linked with less tear production and elevated sensitivity of the ocular surface, which trigger an inflammatory response. Aqueous deficit dry eye and evaporated dry eye are the two common types of dry eye. A few of the testing methods used to detect Dry Eye Disease are the Schirmer’s test, Tear Meniscus Volume, Tear Break-up Time, Tear Film Thickness, Meibomian Gland Infrared Meibography, Lissamine Green Staining, and Rose Bengal Staining. Hyperosmolarity and instability are the main pathogenic processes of dry eye disease. These systems are intricately linked to one another and create a "vicious circle" that never ends. The objective of this review was to describe patented formulations, novel drug delivery systems and herbal drugs for Dry Eye Disease. Following a thorough assessment, the current study has elaborated a number of patented formulations in the form of contact lenses, biomarkers, novel approaches, and emulsions (traditional dosage forms) as well as natural medicines. In comparison to standard dosage forms, contact lenses and novel approaches have longer contact times and higher bioavailability. In this paper, the diagnostic methods of dry eye disease, the outcomes of pathophysiology, herbal treatments, nanotherapeutics, and current patented medicine formulations are described.