Understanding the Root Causes of Dry Eye

March 13th, 2026

If your eyes often feel irritated, tired, watery, or uncomfortable, dry eye may be affecting more of your daily life than you realize. Simple tasks like working on a computer, reading, driving, or spending time outdoors can become frustrating when your eyes do not stay properly lubricated. Dry eye is a common condition, but it does not always have a single cause.

Tear Film Problems and Why They Matter

A healthy tear film has three essential layers that work together to protect the surface of the eye. When one of these layers becomes unstable, the eyes can dry out more easily. Some people have low tear production, while others make tears that do not stay on the eye long enough to provide proper moisture and protection.

This imbalance often leads to inflammation, irritation, and fluctuating vision. In many cases, dry eye is not caused by just one issue, but by several factors happening at the same time.

Meibomian Gland Dysfunction

One of the most common root causes of dry eye is meibomian gland dysfunction, often called MGD. These glands line the eyelids and produce the oil layer of the tear film. When the glands become blocked or the oil quality declines, tears evaporate too fast.

MGD can cause symptoms such as burning, eyelid tenderness, watery eyes, and blurred vision. Even though excess tearing may seem unexpected, it often happens because the eyes are trying to respond to ongoing surface irritation.

Inflammation and Eyelid Conditions

Inflammation is another major contributor to dry eye. Chronic irritation on the eye surface or along the eyelid margins can disrupt tear stability and make symptoms worse over time. Conditions such as blepharitis and rosacea may play a role, especially when redness, irritation, and crusting around the lashes are present.

When inflammation continues untreated, it can create a cycle in which the tear film becomes less effective and the eyes become more sensitive.

Everyday Factors That Can Trigger Dry Eye

Certain habits and environments can make dry eye symptoms worse, even when an underlying cause is already present.

• Long hours on digital devices
• Reduced blinking during reading or screen time
• Dry indoor air or seasonal weather changes
• Contact lens wear
• Aging and hormonal changes
• Certain medications

These triggers do not always cause dry eye on their own, but they often worsen an existing tear film problem.

Why a Proper Evaluation Matters

Because dry eye can have different causes, treatment should not be one-size-fits-all. A proper evaluation helps determine whether symptoms are linked to low tear production, gland dysfunction, inflammation, eyelid issues, or a combination of factors. At Northwest Eye Center, we provide dry eye evaluations and offer more advanced treatments including OptiLight IPL and and OptiLift. Identifying the root cause can help guide a more targeted treatment plan that focuses on long-term relief rather than temporary symptom control.

Contact Northwest Eye Center to identify the root cause of your dry eye symptoms and receive personalized care designed for lasting relief. Visit our office in Barrington, Crystal Lake, or Elgin, Illinois. Please call (847) 382-3640, (815) 455-4222, or (847) 888-2020 to book an appointment today.