Dry eye syndrome (DES) is a condition where your eyes either produce low-quality tears or don’t produce enough tears to keep your eyes hydrated. Sometimes the meibomian glands inside your eyelids, which produce the oily layer of your tears, don’t function properly or are blocked, causing your tears to dry out. Environmental factors, certain medical conditions and several medications can also cause DES.
Tears are essential for maintaining eye health and comfort. They moisten your eyes and remove debris. In severe cases, untreated dry eye syndrome can actually damage your cornea and cause vision loss.
The amount of dryness varies in severity from person to person. If you have a minor case of dry eye, you may be able to manage it with over-the-counter eye drops. However, if the problem persists or appears to be getting worse, it's time to visit your eye doctor, who will assess your eyes, find the underlying problem and offer treatment for lasting relief.
Below is a list of complications that may occur if chronic dry eye syndrome isn’t treated:
Conjunctivitis refers to infected or inflamed conjunctiva — the clear layer of cells that covers the white part of your eyeball and the inner surface of your eyelids. Symptoms include grittiness, redness and sensitivity to light.
Keratitis refers to an inflammation of the cornea. It can be caused by different types of infections, abnormalities of the eyelids, injury and dry eye. If the deeper layers of the cornea are involved, scarring or a corneal ulcer may result, particularly if left untreated.
A corneal ulcer is an open sore that develops on the cornea—the clear, protective outer layer of your eyes.
While corneal ulcers typically develop following an injury, they can also be caused by severe dry eye.
On a daily basis, debris, like dirt and sand particles, enter your eyes and scratch the surface of the cornea. When your tear glands don’t produce enough tears to wash away the particles, bacteria can infect the scratch and cause an ulcer.
Luckily, corneal ulcers are easily treated with antibiotic eye drops. Left untreated, however, these ulcers can spread and scar the eyeball, causing partial or even complete blindness.
Inability to wear contact lenses
Unless your eyes produce enough good-quality tears, your contact lenses can become overly dry, leading to a gritty sensation, irritation and redness. Without sufficient moisture, your contacts may stick to your eyeball, making it difficult to remove them.
Though chronic dry eye syndrome may prevent you from wearing standard contact lenses, certain specialized contact lenses can improve ocular hydration and comfort.
Difficulty keeping your eyes open
Depending on the severity of dry eye, it may be difficult to keep your eyes open. This may occur if dry eye syndrome causes extreme light sensitivity or a chronic sensation that something is stuck in your eye.
While artificial tears may provide enough moisture to partially open your eyes, you may still feel the urge to squint, especially when exposed to a computer screen or sunlight.
Difficulty reading or driving
While blurred vision often signals that you need a stronger prescription, it's also a common symptom of chronic dry eye syndrome.
Left untreated, the blurriness may worsen and even lead to double vision. Naturally, this makes driving and reading a real struggle.
While there's room for more research, studies have shown that there may be a connection between headaches and dry eye. A population-based case study of more than 72,000 patients published by JAMA Ophthalmology (2019) found that people who suffer from migraine headaches are more likely to have dry eyes compared to the general population.
It’s not clear why. According to the paper, being female and of advanced age play an important role in determining the strength of this association.
A 2015 study, published in the journal Cornea evaluated the connection between dry eye disease and depressive symptoms in more than 6,000 women. Researchers found that women diagnosed with dry eye had a higher likelihood of developing depressive moods, anxiety, and psychological stress.
While the connection isn’t fully understood, researchers noted that some medications for treating depression have a drying effect on the eyes, and that dry eye syndrome may limit a person’s participation in activities, to the point where they may become anxious, withdrawn and even depressed.
If you have dry eye, we encourage you to schedule an appointment with Northwestern Eye Associates Dry Eye Center in order to find the best treatment options and thus increase the quality of your tears and life.
Northwestern Eye Associates Dry Eye Center serves patients from Mt. Dennis, Toronto, York, and Rockcliffe Smythe, ON and surrounding communities.
- A: If you experience itchiness, light sensitivity, tearing and tired eyes, it could indicate that you have dry eye syndrome. Get your eyes checked by an eye doctor, who will thoroughly diagnose your symptoms and offer lasting treatment.
- A: Various things can cause dry, itchy eyes. Some of the most common causes include blocked glands, environmental factors (wind, air pollution), infrequent blinking, certain medications, standard contact lenses and Demodex mites.