Gingko Biloba shown to protect optic nerve cells from injury

Oral consumption of Ginkgo biloba led to a higher survival rate of optic nerve cells (retinal ganglion cells). The effect was dosage-dependent - the higher concentrations of Ginkgo resulted in higher optic nerve cell survival rates. The dosages of Ginkgo were comparable to those an average person could safely consume.

Dosage dependence of the effect of Ginkgo biloba on the rat retinal ganglion cell survival after optic nerve crush - Abstract