The listings of research below represents a compilation of scientific articles found on the topic, with a very brief overview description of each article/study. This compilation of research articles does not necessarily imply that there are adequate results to demonstrate safe and/or effective human use of any herb listed.
In this human study, Ginkgo biloba extract significantly increased end diastolic velocity in the opthalmic artery and could be useful to treat glaucomatous optic neuropathy and other ischemic ocular diseases. From: Chung, H. S., Harris, A., Kristinsson, J. K., Ciulla, T. A., Kagemann, C., & Ritch, R. (1999). Ginkgo biloba extract increases ocular blood flow velocity. Journal of ocular pharmacology and therapeutics, 15(3), 233-240.
Ginkgo biloba extract reduced preexisting visual field damage in some patients with normal tension glaucoma. From: Quaranta, L., Bettelli, S., Uva, M. G., Semeraro, F., Turano, R., & Gandolfo, E. (2003). Effect of Ginkgo biloba extract on preexisting visual field damage in normal tension glaucoma. Ophthalmology, 110(2), 359-362. Link: http://dx.doi.org/10.1016/S0161-6420(02)01745-1
In this small population sample of people with senile macular degeneration, those treated with ginkgo had a statistically significant improvement in long distance visual acuity. From: Lebuisson, D. A., Leroy, L., & Rigal, G. (1986). Treatment of senile macular degeneration with Ginkgo biloba extract. A preliminary double-blind drug vs. placebo study. Presse medicale (Paris, France: 1983), 15(31), 1556-1558.
This drug review of forskolin (a diterpene in coleus) as an antiglaucoma with research on its intraocular pressure changes in rabbits, monkeys, and humans. From: Wagh, V. D., Patil, P. N., Surana, S. J., & Wagh, K. V. (2012). Forskolin: upcoming antiglaucoma molecule. Journal of postgraduate medicine, 58(3), 199.
A small but growing number of people in the USA use herbs to treat various eye diseases. From: Bromfield, S. G., & McGwin Jr, G. (2013). Use of complementary and alternative medicine for eye-related diseases and conditions. Current eye research, 38(12), 1283-1287.
The following herbs were combined to make an eye drop that was effective without side effects for a variety of eye conditions: Carum copticum, Terminalia belirica, Emblica officinalis, Curcuma longa, Ocimum sanctum, Cinnamomum camphora, Rosa damascena and meldespumapum. These herbs were chosen for their anti-infective and anti-inflammatory potential. From: Biswas, N. R., Gupta, S. K., Das, G. K., Kumar, N., Mongre, P. K., Haldar, D., & Beri, S. (2001). Evaluation of Ophthacare® eye drops—a herbal formulation in the management of various ophthalmic disorders. Phytotherapy Research, 15(7), 618-620.