What you could do is possibly increase your intake of Beta-carotene and Lutein.
Lutein obviously protects against Macular degneration, and is prevalent in things like Corn, Spinach and Kale as examples.
You can get it in Egg Yolks, but owing to the 60/40 approximate HDL / LDL Cholesterol split, I'd avoid any more than 1 Yolk a day, incase you ingest more LDL then is wise to.
Intake I understand only needs to be at a max 4mg daily, and a Yolk for example has about 1-1.2mg.
Obviously Carrots for Beta-carotene, but also things like a lot of Fruits, Broccoli, Parsley, Spinach will too. Sweet Potato can, and so can interestingly Pistachios, to name but some.
Those should have useful benefits on the eyes, and might possibly help, but I can't say conclusively they will.
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