Trouble with vision makes senior living difficult for millions of Americans. In fact, according to the National Eye Institute, an estimated 1.75 million people in the U.S. have age-related macular degeneration (AMD) - the leading cause of blindness among seniors. Certain nutrients have often been seen as a good way for adults to protect their vision, and although recent research has cast doubt as to whether supplements are an effective path to take, there are still many natural sources of nutrients such as vitamins A, C and E as well as omega-3 fatty acids.

Orange juice
The American Optometric Association (AOA) cites vitamin C as one of the best nutrients for eye health. Specifically, the antioxidant helps promote the well-being of ocular blood vessels, and experts have found people who get plenty of vitamin C have a lower risk of developing cataracts. Most citrus fruits are good sources of this helpful nutrient, and drinking orange juice is one of the best ways to add vitamin C to one's diet. Lemons, grapefruits and limes are other good options if you'd like to mix it up once and a while. 

Kale
If there's one food that can seemingly do it all, it's kale. The leafy green vegetable has been shown to be particularly beneficial for brain and heart health, and, according to The Huffington Post, it can also aid in maintaining your eyesight. The benefits are drawn from two antioxidants known as lutein and zeaxanthin, which help remove damage from free radicals that form due to blue light intensity. Experts say including kale in your diet could cut the development of AMD by approximately 18 percent. 

Tuna and Salmon
Omega-3 fatty acids are among the most important nutrients for senior health, and that's no different for maintaining good vision. According to WebMD, these fatty acids have shown to protect against both cataracts and AMD, and fish are one of the best sources for omega-3. In fact, a 2010 study from Johns Hopkins University found that people who had diets that were higher in fish also enjoyed a lower rate of AMD, notes WebMD. Salmon and tuna are good options, but other seafood can have high levels of the nutrient as well, with oysters, trout and mackerel all proving to be good options.