Dry eyes feel like stinging, burning, or a gritty sensation, as if something is stuck in your eye. If those feelings show up regularly, especially later in the day or after screen time, you likely have some degree of dry eye. The condition affects both eyes in most cases and ranges from mild annoyance to something that interferes with reading, driving, and wearing contact lenses.
The Most Common Signs
Dry eye doesn’t always feel “dry.” In fact, one of the most confusing symptoms is excessive watering. Your eyes produce a flood of reflex tears to compensate for the irritation, but those emergency tears don’t have the right composition to actually protect your eye surface. So your eyes water constantly yet still feel uncomfortable.
Beyond that paradox, the typical symptom list includes:
- Burning, stinging, or scratchy sensation that worsens through the day
- Sensitivity to light
- Eye redness
- Blurred vision that temporarily clears when you blink
- Eye fatigue, especially after reading or screen work
- Stringy mucus in or around the eyes
- Difficulty with nighttime driving due to glare
- Contact lens discomfort that wasn’t there before
You don’t need all of these to have dry eye. Even two or three showing up consistently over a week or more is a strong signal.
A Quick Self-Assessment
Eye doctors use a validated questionnaire called the Ocular Surface Disease Index (OSDI) to gauge dry eye severity. You can walk through a simplified version yourself by asking how often, over the past week, you’ve experienced each of these: light sensitivity, gritty eyes, painful or sore eyes, blurred vision, and poor vision. Then consider whether eye discomfort has limited your ability to read, drive at night, use a computer, or watch TV. Finally, ask whether your eyes felt worse in windy conditions, dry or air-conditioned rooms, or low-humidity environments.
Each question is scored from 0 (none of the time) to 4 (all of the time), and the total converts to a scale of 0 to 100, with higher numbers meaning greater impact on your daily life. You don’t need to calculate a precise score to get value from this exercise. If you’re answering “most of the time” or “all of the time” on several of these, your symptoms are significant enough to address.
When Symptoms Get Worse Tells You a Lot
The timing of your discomfort is one of the most useful clues, because dry eye actually comes in two main forms, and they behave differently throughout the day.
If your eyes feel worst first thing in the morning, the problem is more likely a shortage of tear production. Your eyes aren’t making enough of the watery layer that keeps the surface lubricated. Over time, this type can sometimes point to an underlying autoimmune condition affecting the glands that produce tears.
If your eyes feel fine in the morning but progressively worse as the day goes on, the issue is more likely evaporative dry eye. This is the more common form, and it happens when tiny oil glands along your eyelid margins (called meibomian glands) become blocked or inflamed. Without that thin oil layer on top of your tears, moisture evaporates too quickly. People with this type often have visibly red lid margins, and it’s strongly associated with rosacea on the face or eyelids.
Why Screen Time Makes It Worse
If your dry eye symptoms spike during computer work, there’s a straightforward reason. Under relaxed conditions, you blink roughly 18 to 22 times per minute. During screen use, that rate can plummet to as few as 3 to 7 blinks per minute. Each blink spreads a fresh film of tears across your eye surface, so fewer blinks means your tear film breaks down faster.
It’s not just about blink frequency, either. The blinks you do make while staring at a screen tend to be incomplete, meaning your upper eyelid doesn’t travel all the way down to cover the full cornea. Incomplete blinks leave the lower portion of your eye exposed, causing the tear film there to thin and evaporate. This is why your eyes can feel fine on a weekend away from screens and miserable by Wednesday afternoon at work.
Signs It May Be Part of Something Bigger
Dry eyes on their own are extremely common and usually manageable. But when dry eyes show up alongside a persistently dry mouth, it raises the possibility of Sjögren’s syndrome, an autoimmune condition where the immune system attacks moisture-producing glands throughout the body. Beyond dry eyes and dry mouth, Sjögren’s can cause joint pain and stiffness, swollen salivary glands (the ones just in front of your ears), dry skin, a persistent dry cough, and fatigue. It frequently occurs alongside rheumatoid arthritis or lupus.
If you recognize that cluster of symptoms, it’s worth mentioning the full picture to your doctor rather than treating the eye dryness in isolation. Left unaddressed, the chronic inflammation from autoimmune dry eye can progressively damage the glands responsible for tear production.
What Happens at an Eye Exam
If you suspect dry eye, an eye doctor can confirm it with a few straightforward tests. The most common is a tear production test where a small strip of paper is placed along the inside of your lower eyelid for five minutes. Wetting less than 10 millimeters of the strip suggests inadequate tear production.
Another test measures how quickly your tear film breaks apart after a blink. A stable tear film holds together for at least 8 to 10 seconds. If it breaks up faster than that, the surface of your eye is being left exposed between blinks. Your doctor may also press gently on your eyelids to check whether the oil glands are secreting normally or are blocked, producing a thick, toothpaste-like discharge or nothing at all.
These tests are painless and take only a few minutes. They’re especially useful for distinguishing between the two types of dry eye, which matters because the treatments differ.
Triggers That Make Dry Eye Flare
Certain environments and habits reliably worsen dry eye symptoms. Recognizing your personal triggers can help you confirm the diagnosis and start managing it before you even see a doctor.
- Air conditioning and forced-air heating reduce humidity and accelerate tear evaporation
- Wind and fan exposure, including sleeping under a ceiling fan
- Prolonged screen use without breaks
- Contact lens wear, which disrupts the tear film
- Air travel, where cabin humidity drops below 20%
- Certain medications, including antihistamines, decongestants, and some antidepressants, which reduce tear production as a side effect
If your symptoms track closely with these situations, flaring in dry or air-conditioned rooms and easing in humid environments, you can be fairly confident dry eye is the explanation. A simple test: if holding a warm, damp washcloth over your closed eyes for a few minutes brings noticeable relief, that’s a strong signal that your tear film is the issue.