There’s a lot you can do to keep your eyes healthy and protect your vision. Get a comprehensive dilated eye exam Getting a dilated eye exam is simple and painless — and it’s the single best thing you can do for your eye health! Even if your eyes feel healthy, you could have a problem and not know it. That’s because many eye diseases don’t have any symptoms or warning signs. A dilated eye exam is the only way to check for many eye diseases early on, when they’re easier to treat.