When the temperature drops in North Dakota, the furnace runs around the clock. What most people don’t realize is that the same heating system keeping them warm is also silently pulling moisture from the air, and from their eyes. Dry eye symptoms often spike during winter months not just because of the cold outside, but because of the dry, heated air inside. Burning, scratchiness, and blurred vision are all signs your tear film is struggling to keep up.
At Vision Source Mandan, we see an increase in dry eye complaints each winter, and heating is one of the most common contributing factors. Dr. Brittany Schauer, Dr. Wayne Aberle, and Dr. Danielle Dyke work with patients year-round to identify what’s driving their symptoms and find solutions that actually work in the real conditions of North Dakota living.
What Heating Does to Indoor Air
Furnaces, baseboard heaters, and space heaters are designed to warm air, but in doing so, they dramatically reduce indoor humidity. Cold outside air already holds less moisture, and once it enters your home and gets heated, the relative humidity can drop well below comfortable levels. A study published through the National Institutes of Health found that indoor humidity is positively associated with dry eye metrics, suggesting low-humidity indoor environments can worsen symptoms and signs of the condition.
When humidity drops below 40%, the tear film on your eye’s surface begins to evaporate faster than it can be replenished. The result is a cycle of irritation that many patients describe as constant and hard to escape, because they’re spending most of their time indoors.
The Connection Between Airflow and Tear Evaporation
Forced-air heating systems don’t just dry the air; they also move it. Vents positioned near desks, beds, and seating areas direct warm, dry air directly at your face. Even ceiling fans running in winter to redistribute heat can accelerate tear evaporation. These are environmental triggers that compound each other throughout the day and night.
Patients who wake up with gritty, uncomfortable eyes often have a bedroom vent nearby or sleep in a room with the heat running high all night. If you’re experiencing red or itchy eyes in the morning, your heating setup may be a key factor.
Other Indoor Factors That Compound the Problem
Heating isn’t the only culprit working against your eyes during winter. A number of indoor conditions common to heated homes can layer on top of low humidity to make symptoms significantly worse. These include:
- Extended screen time, which reduces blink rate and allows the tear film to evaporate more quickly
- Ceiling fans or forced-air vents positioned near where you sleep or work
- Low fluid intake, which is common in winter months when people feel less thirsty
Addressing even one of these factors alongside the humidity issue can make a noticeable difference. Our team will help you identify which specific triggers are most relevant to your situation. Computer vision syndrome from increased indoor screen use during winter is another condition we frequently see alongside dry eye complaints.
What You Can Do at Home
There are practical adjustments that can reduce the impact of heated indoor air on your eyes. Using a humidifier in rooms where you spend the most time, especially the bedroom, can help bring humidity back to a range more comfortable for your tear film. Redirecting vents away from your face and placing a humidifier near your workspace are low-cost starting points. Drinking plenty of water throughout the day also supports healthy tear production.
Lubricating eye drops can provide short-term relief, but they won’t address the underlying environmental cause. If symptoms persist or interfere with daily activities, it’s worth getting a thorough evaluation. Our dry eye therapy services go beyond drops to target what’s actually causing your tear film to break down.
When to See an Optometrist for Dry Eye
Not all dry eye is the same. Some patients have reduced tear production, while others produce enough tears but lose them too quickly through evaporation. Both types are affected by dry indoor air, but treatment approaches can differ. Left unaddressed, dry eye syndrome can lead to corneal irritation, increased infection risk, and ongoing discomfort that home remedies alone can’t resolve.
If your symptoms worsen every winter, that pattern is meaningful clinical information. Our doctors use advanced diagnostic tools to assess the quality and stability of your tear film and develop a treatment plan tailored to what you’re actually experiencing.
Get Relief at Vision Source Mandan
Vision Source Mandan has served the Mandan, Bismarck, and surrounding North Dakota communities for over 70 years. Dr. Schauer, Dr. Aberle, and Dr. Dyke bring decades of combined experience to every patient visit, and our practice is equipped with the diagnostic technology to accurately evaluate and manage dry eye at every stage. As a member of the Vision Source network, we stay on the leading edge of eye care advancements so our patients always have access to the most current options.If this winter has brought on burning, scratchiness, or blurred vision, don’t wait for the season to change. Contact our office to schedule an evaluation, and let us help you find the relief you need.