Keeping your eyes moist comes down to two things: producing enough tears and preventing those tears from evaporating too quickly. Your tear film is a three-layer structure with an oily outer layer, a watery middle layer, and a mucus layer that sits directly on the eye’s surface. When any of these layers is disrupted, your eyes feel dry, gritty, or irritated. The good news is that most of the factors affecting your tear film are things you can control at home.
Why Your Eyes Dry Out
The outermost layer of your tear film is a thin coating of oil produced by tiny glands in your eyelids called meibomian glands. This oil layer is critical: it creates a smooth optical surface and slows evaporation of the watery layer beneath it. When these glands get clogged or stop working well, tears evaporate faster, and your eyes feel dry even if you’re producing a normal amount of fluid.
Several everyday factors speed up that evaporation or reduce tear production. Screen use is one of the biggest culprits. Your normal blink rate is about 20 blinks per minute, but research shows that reading on any digital display, whether a computer, tablet, phone, or e-reader, cuts your blink rate by 45 to 55%. Since blinking is what spreads fresh tears across your eye, fewer blinks means less moisture reaching the surface. Certain medications also reduce tear production. Antihistamines, antidepressants, beta-blockers, corticosteroids, and some anti-inflammatory drugs are all known to contribute to dry eyes. If you take any of these regularly and notice dryness, that connection is worth exploring with your prescriber.
The 20-20-20 Rule for Screen Time
If you work at a screen for hours, the simplest intervention is the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. This breaks the concentration that suppresses blinking and gives your tear film a chance to recover. You can also make a conscious effort to blink fully and frequently during screen work. It sounds almost too simple, but deliberate blinking is one of the most effective ways to redistribute moisture across your eyes throughout the day.
Positioning your screen slightly below eye level helps too. When you look upward or straight ahead at a monitor, your eyelids open wider, exposing more of the eye’s surface to air. Angling your gaze slightly downward narrows that opening and reduces evaporation.
Warm Compresses for Clogged Oil Glands
If your dryness is related to the oil layer (and for many people it is), warm compresses can unclog your meibomian glands and restore the protective lipid coating on your tears. The key is getting the temperature right. Research published in Ocular Surface found that the oils in these glands begin to liquefy effectively at around 40 to 42°C (104 to 108°F) at the gland itself. Because the skin of your eyelid absorbs some of the heat before it reaches the glands, you need the compress surface to be about 45 to 47°C (113 to 117°F) to deliver enough warmth internally.
A clean washcloth soaked in hot water works, but it cools quickly. Microwavable eye masks designed for this purpose hold heat more consistently. Apply the compress for 5 to 10 minutes, then gently massage your eyelids from top to bottom to help express the softened oils. Doing this daily, especially in the morning, can make a noticeable difference within a couple of weeks.
Choosing the Right Artificial Tears
Artificial tears are the most common tool for adding moisture back to your eyes, but not all drops are the same. If you use them four times a day or fewer, standard drops with preservatives are generally fine. If you need them more often than that, switch to preservative-free formulations. The preservatives in multi-dose bottles, particularly one called benzalkonium chloride, can irritate the eye’s surface with repeated exposure, especially if your eyes are already moderately or severely dry.
Preservative-free drops come in single-use vials. They cost a bit more, but they eliminate the risk of preservative buildup on your cornea. When shopping, you’ll also see options labeled for different types of dryness. Drops that contain a lipid component are designed to supplement that oily outer layer, while thicker gel drops provide longer-lasting moisture at the cost of slightly blurry vision for a minute after application.
Overnight Protection
Many people wake up with their driest, most uncomfortable eyes of the day. During sleep, you’re not blinking, and in some cases your eyelids don’t close completely. Eye ointments are specifically designed for this problem. They have a thick, greasy texture that creates a durable barrier over the eye’s surface, locking in moisture for hours. Unlike drops, which wash away quickly with your tears, ointments stay in place throughout the night and provide continuous hydration until morning.
The tradeoff is that ointments blur your vision significantly, which is why they’re recommended only at bedtime. Apply a small ribbon along the inside of your lower eyelid just before you turn off the lights. If ointments feel too heavy, lubricating gels offer a middle ground: thicker than drops, thinner than ointments, and they clear from your vision faster.
Adjust Your Environment
The air around you has a direct impact on how fast your tears evaporate. Dry indoor air, particularly from heating systems in winter or aggressive air conditioning in summer, is a common and often overlooked cause of eye dryness. Research suggests that indoor humidity between 40 and 60% is optimal. A simple hygrometer (available for a few dollars) can tell you where your home or office falls, and a humidifier can bring it into range.
Direct airflow is another factor. Ceiling fans, car air vents, and forced-air heating systems that blow toward your face will dry your eyes out fast. Redirecting vents away from your face or wearing wraparound glasses outdoors on windy days creates a physical shield against evaporation.
Hydration and Omega-3 Fatty Acids
Your tear film draws from your body’s overall water supply. Research on tear osmolarity shows that systemic dehydration raises the salt concentration of your tears, which can damage the cells on your eye’s surface over time. This is especially common in older adults, who often don’t feel thirsty even when they’re underhydrated. Staying consistently hydrated won’t cure dry eye disease, but it supports the baseline chemistry your tear film needs to function properly.
Omega-3 fatty acids may also help, particularly if your dryness is related to meibomian gland dysfunction. A randomized controlled trial studied patients with moderate gland dysfunction taking a daily dose of 1,680 mg of EPA and 560 mg of DHA (two specific types of omega-3s found in fish oil). While results across studies have been mixed, the rationale is straightforward: omega-3s can improve the quality of the oils your eyelid glands produce, making the protective lipid layer of your tear film more stable. You can get these amounts from fish oil supplements or from fatty fish like salmon, mackerel, and sardines eaten several times a week.
Putting It All Together
Dry eyes rarely have a single cause, so the most effective approach combines several of these strategies. A practical daily routine might look like this: start the morning with a warm compress and gentle lid massage to get your oil glands flowing. Use preservative-free artificial tears throughout the day as needed. Follow the 20-20-20 rule during screen work and keep your monitor slightly below eye level. Run a humidifier if your indoor air is below 40% humidity. Apply a lubricating ointment or gel at bedtime. Maintain steady water intake and consider adding omega-3s to your diet.
Most people notice improvement within one to two weeks of consistent effort. If your eyes remain persistently dry, red, or painful despite these changes, an eye care professional can evaluate whether your meibomian glands need in-office treatment or whether an underlying condition is contributing to the problem.