The most common signs of dry eyes are a burning, stinging, or scratchy feeling that affects both eyes and tends to worsen throughout the day. If your eyes frequently feel gritty, look red, or water excessively (which is actually your body’s reflex response to dryness), you likely have some degree of dry eye. It’s one of the most common eye conditions, and recognizing it early matters because untreated dry eye can eventually damage your cornea.
Symptoms That Point to Dry Eye
Dry eye produces a cluster of symptoms that can seem unrelated at first. The hallmark is a stinging, burning, or scratchy sensation, but here’s the full list of what to watch for:
- Gritty feeling, as if something is stuck in your eye
- Burning or stinging that comes and goes throughout the day
- Excessive watering, your eyes’ attempt to compensate for poor-quality tears
- Blurred vision that clears temporarily when you blink
- Eye redness
- Light sensitivity
- Stringy mucus in or around the eyes
- Eye fatigue, especially after reading or screen work
- Difficulty wearing contact lenses
- Trouble with nighttime driving
You don’t need every symptom on this list. Even two or three occurring regularly is enough to suspect dry eye. The watery eyes symptom surprises most people, but it’s one of the most telling clues. When your tear film is unstable, your eyes flood with low-quality reflex tears that don’t actually lubricate the surface well.
A Simple Self-Assessment You Can Try
Eye doctors use a validated questionnaire called the Ocular Surface Disease Index (OSDI) to screen patients. It asks about how often you experience discomfort, visual problems, and trouble with specific activities like reading, driving at night, or working on a computer. Scores range from 0 to 100: 0 to 12 is normal, 13 to 22 is mild dry eye, 23 to 32 is moderate, and anything above 33 is severe. Another shorter screening tool, the DEQ-5, flags likely dry eye at a score of 6 or higher.
You can find versions of both questionnaires online and use them to get a rough sense of where you fall. They won’t replace a clinical exam, but they give you useful language and context if you decide to see an eye doctor.
Timing Matters: When Symptoms Are Worst
Pay attention to when your eyes feel the driest, because the timing can reveal what type of dry eye you have. There are two main types, and they have different causes.
If your eyes feel worst first thing in the morning and improve as the day goes on, you may have aqueous deficient dry eye. This means your tear glands aren’t producing enough of the watery layer of your tears. In some cases, this form is linked to autoimmune conditions that gradually damage the tear glands.
If your eyes feel fine in the morning but get progressively worse throughout the day, the more likely culprit is evaporative dry eye, which is the more common type. This happens when tiny oil glands along your eyelid margins (called meibomian glands) aren’t working properly. Without enough oil in your tear film, tears evaporate too quickly. Many people have a combination of both types.
Screen Time and Other Triggers
Nearly 60% of Americans spend at least five hours a day on a digital device, and that screen time is a major dry eye driver. The reason is simple: you blink less when you’re focused on a screen. Normal blink rates drop significantly during computer work, and holding a smartphone 8 to 12 inches from your face slows blinking even further. Less blinking means your tear film isn’t being refreshed, and the surface of your eye dries out. Prolonged computer use may even change the composition of your tears, reducing the protective mucus layer.
Other common triggers include low humidity (indoor air below about 45% humidity is particularly hard on the eyes), air conditioning or heating vents blowing toward your face, windy or smoky environments, and certain medications like antihistamines, antidepressants, and blood pressure drugs. Aging is the single biggest risk factor. Hormone changes during menopause also make dry eye more common in women over 50.
Is It Dry Eye or Something Else?
Several conditions feel a lot like dry eye, and one of the most common lookalikes is blepharitis, an inflammation of the eyelids. Both cause burning, stinging, redness, and light sensitivity. The key differences are physical signs along the eyelid itself. Blepharitis produces crusty or flaky debris at the base of your eyelashes, foamy or bubbly tears, and in more advanced cases, eyelash loss or misdirected lash growth. Dry eye alone doesn’t cause these eyelid-specific symptoms.
The two conditions are closely related. Blepharitis often causes dry eye by disrupting the oil glands in your eyelids, but dry eye doesn’t cause blepharitis. If you notice crustiness along your lash line in addition to dryness, both conditions may be at play, and treating the eyelid inflammation often improves the dryness.
Allergic conjunctivitis is another condition that overlaps with dry eye. The distinguishing feature is itching. Allergies make your eyes intensely itchy, while dry eye is more of a burning or gritty sensation. Seasonal patterns and other allergy symptoms (sneezing, nasal congestion) also point toward allergies rather than dry eye.
What Happens at an Eye Exam
If you suspect dry eye, an eye doctor can confirm it with a few quick, painless tests. The most common is a tear breakup time test, where your doctor places a small drop of dye on your eye and watches how quickly your tear film becomes unstable. A breakup time under 10 seconds is considered abnormal. Another standard test measures tear production by placing a small strip of paper inside your lower eyelid for five minutes. Wetting less than 10 millimeters of the strip suggests dry eye.
Your doctor may also measure tear osmolarity, which is essentially how concentrated (salty) your tears have become. Highly concentrated tears indicate that you’re not producing enough of the watery component, or that tears are evaporating too fast. Staining tests using special dyes can reveal microscopic damage to the surface of the eye that you wouldn’t be able to see or feel on your own. This kind of surface damage is considered a later sign of the disease, so catching it early through the other tests is ideal.
Signs Your Dry Eye Needs Attention
Mild, occasional dryness after a long day of screen work is extremely common and often manageable with simple changes like taking regular screen breaks, using a humidifier, or trying over-the-counter lubricating drops. But if dryness is persistent, worsening, or interfering with daily activities like reading, driving, or working comfortably, it’s worth getting evaluated. Severe, untreated dry eye can damage the cornea over time, potentially affecting your vision. Pain that goes beyond mild irritation, significant vision changes, or symptoms that don’t respond to basic lubricating drops are all reasons to move beyond self-management.