saffron name is enough.

Saffron for Macular Degeneration: Super Spice for Eye Health. There is a lot of buzz around saffron and its ability to support optimal eye health. The benefits of saffron for the eyes are the result of high concentrations of natural carotenoids that can help protect the lens and the retina of aging eyes.

Saffron Improves Vision in Aging Humans. Macular degeneration is the leading cause of irreversible blindness in Americans age 50 and older. Scientists first discovered that saffron can improve visual acuity as well as sensitivity to light, even in people with early macular degeneration.
Saffron And Honey:
Mix 20 mg of organic saffron or kesar powder to two teaspoon of honey and have it. Consumption of this, once daily will increase the retinal response and sensitivity to light and improve vision.
Saffron Tea:
To one cup of boiled milk, add sugar and ten strands of saffron. Boil it on low flame and switch off after 5 minutes. There is no need of straining the tea. Sip this and get the benefits of saffron for eye.
care should be take while taking or consumption of saffron.