Correct Bad HabitsSometimes a specific task causes eye strain because of the way you do it. Breaking these bad habits and creating good habits in their place can help. Ensure you have the proper ergonomic setup, technique and equipment for the visual aspect of your task.
Strengthen the EyesStrong, healthy eyes with strong, healthy eye muscles (like all muscles) can handle a lot more stress before they become strained. Eye strengthening exercises can give you greater stamina for your viewing pleasure.
Wear the Proper Corrective LensesMake sure your eye glass prescription is up to date. If you do not wear glasses, maybe you should. It could be as simple as needing reading glasses, especially if you are over 40 and experiencing recurring eye strain for the first time.
Use Adequate LightingMake sure you have adequate lighting levels for the task you are performing. But do not go overboard. To bright of a light can cause eye strain as well.
Especially if you are focusing on a light emitting source like a TV or computer monitor. As a general rule ambient lighting for screen use should be between 50-100% of the screens brightness. For task work you want enough light to see the details you need without squinting. You also want to place light sources so there are no shadows.
Give Your Eyes a BreakFollow the 20-20 rule. For every twenty minutes of concentrated close-up work take a twenty second break by looking at something twenty feet away. This allows the ciliary body to relax. You should also soothe your eyes every hour.
Keep Things at a DistanceThe eyes have to work harder the closer they have to focus. Give them a break by keeping that focus as far away as possible.
For computer use ensure you follow good ergonomic computer monitor setup guidelines. For tasks that require you to hold things in your hand keep them at the greatest arms length possible without interfering with your balance and/or strength. In other words don’t knit up close or bend down to the counter when slicing that tomato.