Polarized sunglasses do make a big difference. Many people think seeing sunglasses that are polarized is a scam and it really doesn't mean anything - that's false. They remove glare and make seeing easier - especially when driving.
If you do any amount of driving at all, just try a pair of polarized sunglasses and you'll notice the difference. You'll no longer see your dashboard reflecting off your windshield and your view of the road will be clearer. This means less strain on your eyes and on your brain.