Glaucoma treating eye drops developed by University of British Columbia researchers may help ease glaucoma symptoms while we sleep, finds a new study. Cannabinoids based hydrogel formula is being used to treat glaucoma. The findings of this study are published in the journal of Drug Delivery and Translational Research.
"Medicated eye drops are commonly used to treat glaucoma, but they're often poorly absorbed. Less than five percent of the drug stays in the eye because most of the drops just roll off the eye," said lead researcher Vikramaditya Yadav, a professor of chemical and biological engineering, and biomedical engineering at UBC.
"Even when the drug is absorbed, it may fail to reach the back of the eye, where it can start repairing damaged neurons and relieving the pressure that characterizes glaucoma."
They applied the drops on donated pig corneas, which are similar to human corneas, and found that the drug was absorbed quickly and reached the back of the eye.
"You would apply the eye drops just before bedtime, and they would form a lens upon contact with the eye. The nanoparticles slowly dissolve during the night and penetrate the cornea. By morning, the lens will have completely dissolved," said Yadav.
Previous research shows that cannabinoids like CBGA are effective in relieving glaucoma symptoms, but no cannabis-based eye drops have so far been developed because cannabinoids don't easily dissolve in water, according to the researchers.
"By suspending CBGA in a nanoparticle-hydrogel composite, we have developed what we believe is the first cannabinoid-based eye drops that effectively penetrate through the eye to treat glaucoma. This composite could also potentially be used for other drugs designed to treat eye disorders like infections or macular degeneration," said study co-author Syed Haider Kamal, a research associate in Yadav's lab.