- Green leafy vegetables like spinach, kale, and collards
- Salmon, tuna, and other oily fish
- Eggs, nuts, beans, and other non meat protein sources
- Oranges and other citrus fruits or juices
- Oysters and pork
- Blurry vision
- Headaches
- Eyestrain
- Trouble focusing at a certain distance
- Shoulder or neck pain
- Look 20 feet away
- For 20 seconds