Silicone hydrogel contact lenses. These lightweight soft lenses allow more oxygen to penetrate the lens, making it easier for your eyes to breathe. Some varieties of silicone hydrogel lenses also have a moisture agent built in that keeps eyes fresh and moist, even in challenging conditions. If you travel a lot -- or even if you just experience tired, dry eyes on a regular basis -- talk to your ECP about switching to silicone hydrogel lenses.