Blueberries, blackberries, and bilberries have high antioxidant levels, which have been shown to prevent macular degeneration and yield vision improvement.
I grow blueberries and blackberries and make juice out of them.
If you have a garden, then plant some thornless blackberry bushes this coming spring. Lowes and Home Depot sell them every spring.
They are easy to care for, but must be pruned to yield a lot of berries.
You'll need to eat them the rest of your life, so you might as well grow them.
The berries are expensive to buy.
You can also buy blueberries in jars from import stores. The tiny ones are the best for the eyes. Gordon Food stores sells them frozen in large bags.
They also help with night vision.
I drink 1/2 cup berry juice every day. They also thin the blood and prevent strokes.
I grow pears too. The juice prevents altzheimers and dementia.
You can purchase bilberry tablets online and at some health food stores.
I think Commission E in Germany has looked into bilberries for the eyes.
Search in the internet for "macular degeneration berries".
You might find some studies done on them.
The only way to keep your health is to eat what you don't want,
drink what you don't like, and do what you'd rather not.
~ Mark Twain ~