Yes, you can read books when you are in travel it won’t cause any damage to your vision. Even though your eyes get strained they will get back to normal once you have completed it.
Yes, your eyes require enough rest so that they could get good blood circulation. The lack of sleep may lead to certain eye conditions blurry vision, light sensitivity, and dry eyes.
Yes, spinach and leafy vegetables are rich in antioxidants and other essential nutrients for good vision. So taking them not only improves your vision but also helps you in having long-term good vision.
Yes, both smoking and alcohol consumption for the longer term will have a greater influence on your eyesight. People who are smoking have double the chance of getting AMD and cataracts as age grows and alcohol consumption may bring optic neuropathy.