The whites of your eyes can look brighter with a combination of lifestyle changes, the right eye drops, and protection from environmental irritants. Redness, dullness, and yellowing all have different causes, so the approach that works depends on what’s behind your particular discoloration.
Why Your Eyes Look Red or Yellow
Red eyes and yellow eyes are two different problems. Redness happens when tiny blood vessels on the surface of your eye dilate, usually from irritation, dryness, lack of sleep, or prolonged screen time. Environmental triggers like low humidity, wind, dust, and UV radiation can also inflame the eye’s surface and make blood vessels more visible.
Yellowing is a separate issue. A uniform yellow tint across the whites of both eyes often signals excess bilirubin in your blood, a pigment your liver normally processes. This can point to liver conditions, gallbladder problems, or certain inherited conditions like Gilbert’s syndrome. A small, raised yellowish patch on one eye (usually near the nose) is more likely a pinguecula, a benign growth caused by sun and wind exposure over time. If the whites of your eyes have turned noticeably yellow, that warrants a medical evaluation rather than a cosmetic fix.
Get More Sleep
Sleeping fewer than six hours a night is classified as partial sleep deprivation, and it measurably changes blood vessel behavior in and around the eye. The good news: research on sleep-deprived subjects found that all vascular changes recovered after just three nights of regular sleep (about eight hours per night). If your eyes are chronically red and you’re cutting sleep short, this is the single highest-impact change you can make.
Stay Hydrated
The human eye is roughly 98% water. Systemic hydration, meaning how much water you drink throughout the day, directly affects ocular moisture and even measurable properties like corneal thickness and eye pressure. When you’re dehydrated, your tear film becomes less stable, leaving the eye’s surface exposed to irritation and making blood vessels more prominent. There’s no magic number, but consistent water intake throughout the day keeps tear production steady and helps maintain a clear, bright-looking eye surface.
Choose the Right Eye Drops
Not all redness-relief drops are equal, and the wrong choice can make things worse over time.
Older over-the-counter drops containing naphazoline or tetrahydrozoline work by constricting blood vessels on the eye’s surface. They’re effective short-term, but tetrahydrozoline loses its whitening ability after about ten days of regular use. That diminished effectiveness can encourage overuse, and prolonged use of these older vasoconstrictors can lead to a condition called rebound redness, where your eyes become redder than they were before you started using the drops.
A newer option, low-dose brimonidine (0.025%), works differently. It constricts blood vessels primarily on the venous side rather than the arterial side, which means it reduces redness without cutting off the eye’s blood supply. In clinical trials, it provided about eight hours of redness relief per dose, maintained its effectiveness over four weeks of daily use with no tolerance buildup, and produced negligible rebound redness after discontinuation. Only about 3% of study participants experienced any rebound at all. Side effects were rare and mild: occasional slight stinging, minor itching, or a brief foreign-body sensation. This ingredient is available over the counter under brand names you’ll find in most pharmacies.
For everyday dryness rather than redness, preservative-free lubricating drops (artificial tears) are a better choice. They won’t actively whiten your eyes, but they reduce the irritation that causes redness in the first place. The FDA has flagged contamination issues with certain lubricant eye drop brands, so stick with well-known manufacturers and check for any active recalls before purchasing.
Protect Your Eyes From the Environment
UV radiation, wind, dust, and dry air all trigger inflammatory responses on the eye’s surface. Over time, this leads to chronic redness and can contribute to growths like pingueculae that permanently discolor the whites of your eyes.
UV-protective sunglasses are the simplest defense. Wrap-around styles block wind and particulates as well as sunlight. If you work in a dry, air-conditioned office, a small desktop humidifier can help stabilize your tear film. On high-pollution or high-pollen days, limiting time outdoors or wearing glasses (even non-prescription) creates a physical barrier that reduces irritant contact with your eyes.
Reduce Screen-Related Strain
You blink about 60% less often when staring at a screen, which accelerates tear evaporation and leaves the eye surface dry and irritated. The 20-20-20 rule helps: every 20 minutes, look at something 20 feet away for 20 seconds. This resets your blink rate and gives your tear film a chance to redistribute. Positioning your screen slightly below eye level also helps, because it reduces the amount of exposed eye surface and slows evaporation.
Eat for Eye Health
Several nutrients directly support the health of your eye’s surface and the tissues surrounding it. You don’t need supplements if your diet covers the basics, but knowing what to prioritize helps.
- Vitamin A is essential for maintaining the mucous membranes that keep eyes moist. Carrots, sweet potatoes, leafy greens, and liver are rich sources.
- Vitamin C supports the tiny blood vessels in your eyes and acts as an antioxidant against UV damage. Citrus fruits, strawberries, bell peppers, and broccoli are the best dietary sources.
- Vitamin E protects eye tissue from oxidative stress. Almonds, hazelnuts, sunflower seeds, and vegetable oils provide it.
- Omega-3 fatty acids help maintain a healthy tear film, reducing the dryness that leads to redness. Fatty fish like salmon and mackerel are the most concentrated sources.
- Lutein and zeaxanthin are pigments that accumulate in eye tissue and filter harmful light. Spinach, kale, and other dark leafy greens are your best bet.
Deficiencies in any of these nutrients can show up as eye dryness, irritation, and surface inflammation, all of which make the whites of your eyes look dull or red. A diet that includes a variety of colorful vegetables, leafy greens, nuts, and fish two or three times a week covers most of these bases without supplementation.
Cut Back on Alcohol and Smoking
Alcohol is processed by the liver, and heavy drinking raises bilirubin levels, the same pigment responsible for yellow-tinged eyes. Even moderate drinking can dehydrate you enough to reduce tear quality overnight, which is one reason your eyes often look red the morning after. Smoking introduces chronic irritation to the eye’s surface and accelerates UV-related damage to the conjunctiva. Reducing or eliminating both habits produces visible improvements in eye clarity over weeks.