Firstly, you can cross your eyes and focus on the tip of your nose, and looking at a far-off object and focusing on it. You should repeat this process with your breathing, that is to say, you should look at your nose when you inhale and the far-off object as you exhale. Or you can take a 20-20-20 eye exercise if you spend a lot of time on computer or focus on close-up details to reduce eyestrain. That is to say, you should take a break after 20 minutes, and look a 2 feet far away object for 20 seconds. On the other side, you can help manage early presbyopia by building muscle strength. You can be trained to look at a moving object, that is to say, you should alternatively focus your vision from an outside target to the center, rolling your eyes, slow and fast blinking, squeezing the eyelids shut, looking at the end of your nose.