Dry Eye Causes: Allergies, Blepharitis, and Other Common Triggers
Common Dry Eye Symptoms
Dry eye symptoms can feel different for everyone, but they typically signal that your tear film is not working properly. Recognizing these signs early helps you seek the right care before the problem becomes more serious.
Many people describe a sandy or scratchy feeling, as if something small is stuck in the eye. This sensation occurs when your eyes do not produce enough tears or when tears evaporate too quickly, leaving the surface of your eye exposed and irritated. Using preservative-free artificial tears and remembering to blink more often can provide quick relief.
Redness and itching signal inflammation on the eye surface, making you want to rub your eyes for relief. However, rubbing can worsen irritation and potentially damage delicate eye tissues. A cool, clean compress applied gently to closed eyelids can help reduce swelling and soothe itching without causing harm.
Dry eyes can cause your vision to blur temporarily, especially after extended periods of reading or computer work. You may also notice that bright lights feel uncomfortable or cause you to squint, a condition called photophobia. Taking regular breaks from close work and wearing quality sunglasses outdoors can ease these symptoms significantly.
It might seem strange, but dry eyes can actually cause excessive tearing as your body tries to compensate for irritation. Unfortunately, these reflex tears are watery and lack the oils and proteins needed to properly protect your eyes, so they provide little lasting relief. If you experience constant tearing along with other dry eye symptoms, an eye exam can help identify the underlying cause.
Medical Conditions That Trigger Dry Eye
Several health conditions and medications can interfere with normal tear production or change the quality of your tears. Understanding these medical causes helps you and your eye care team develop a more effective treatment plan tailored to your specific situation.
Seasonal or year-round allergies to pollen, dust mites, pet dander, or mold can inflame the surface of your eyes and disrupt your tear film. This inflammation leads to dryness, redness, and intense itching that can make it hard to focus on daily tasks. Over-the-counter antihistamine eye drops can help, and identifying and avoiding your specific allergy triggers will reduce symptoms over time.
Blepharitis is inflammation along the edges of your eyelids that often appears as redness, crusty flakes at the base of your eyelashes, or swollen eyelid margins. This condition blocks the tiny oil glands in your eyelids, preventing them from releasing the oils that keep your tears from evaporating too quickly. Daily eyelid hygiene using warm compresses and gentle cleaning with diluted baby shampoo or special eyelid wipes can help manage blepharitis and reduce associated dry eye symptoms.
Autoimmune diseases like Sjogren syndrome and rheumatoid arthritis can attack the glands that produce tears, leading to severe and chronic dry eye. Sjogren syndrome specifically targets moisture-producing glands throughout the body, causing both dry eyes and dry mouth. Managing dry eye related to autoimmune disease usually requires working closely with both your eye doctor and your rheumatologist or primary care provider to address the underlying condition.
Hormonal fluctuations during menopause, pregnancy, or from thyroid disorders can significantly reduce tear production. These changes most commonly affect women over 50 but can occur at any age due to various health conditions or medications. Adding omega-3 fatty acid supplements to your diet and using lubricating eye drops throughout the day may help maintain more comfortable eyes during hormonal transitions.
A wide range of common medications can decrease tear production as a side effect. Antihistamines, blood pressure medications, antidepressants, birth control pills, and acne treatments are among the most common culprits. If your dry eye symptoms began after starting a new medication, talk to the prescribing doctor about your symptoms, as they may be able to adjust your dosage or switch you to an alternative that causes fewer eye-related side effects.
Lifestyle and Environmental Causes
Daily habits and your surrounding environment can have a surprising impact on your eye comfort. Small changes to your routine and workspace can often provide immediate relief from dry eye symptoms.
Wearing contact lenses for extended periods or not following proper cleaning and replacement schedules can irritate your eyes and contribute to dryness. Contacts can reduce oxygen flow to the front surface of your eye and trap debris and allergens against your eye. Switching to daily disposable lenses, using rewetting drops designed for contact lens wearers, or giving your eyes regular breaks by wearing glasses can improve comfort.
Low humidity levels from heating systems in winter or air conditioning in summer can dry out your eyes quickly. Air blowing directly from vents, fans, or car heaters can make the problem even worse by increasing tear evaporation. Using a humidifier in your bedroom or workspace, positioning yourself away from direct airflow, and keeping rooms at a comfortable humidity level can all help keep your eyes moist.
Staring at computer screens, tablets, or smartphones significantly reduces how often you blink, which is your eyes' natural way of refreshing their tear film. When you blink less, tears evaporate faster and your eyes become dry and tired. Following the 20-20-20 rule helps give your eyes needed breaks: every 20 minutes, look at something 20 feet away for at least 20 seconds, and remember to blink fully and frequently.
Cigarette smoke, vaping, air pollution, and environmental irritants can trigger eye irritation and speed up tear evaporation. Wind and cold weather can also cause tears to evaporate more quickly, while bright sunlight can increase light sensitivity. Wearing wraparound sunglasses outdoors protects your eyes from wind and UV rays, and avoiding smoking or secondhand smoke helps maintain better tear quality and overall eye health.
Advanced Dry Eye Treatments
When over-the-counter remedies are not enough, advanced treatment options can provide significant relief for moderate to severe dry eye. At Dulles Eye Associates, our fellowship-trained ophthalmologists specialize in diagnosing and treating complex dry eye conditions using the latest technology and techniques.
We offer several advanced in-office treatments that target the root causes of dry eye. Intense Pulsed Light therapy, or IPL, uses controlled light pulses to reduce inflammation around the eyelids and improve oil gland function. The iLux Thermal Pulsation System applies heat and gentle pressure to unblock clogged oil glands in your eyelids, allowing them to function normally again. These treatments are usually quick and comfortable, and many patients notice improvement within days.
Meibomian gland dysfunction, or MGD, occurs when the tiny oil glands along your eyelid margins become blocked or stop working properly. This is one of the most common causes of dry eye because without healthy oils, your tears evaporate too quickly. We specialize in MGD treatment through thermal gland expression, a technique that carefully warms and manually expresses blocked glands to restore proper oil flow and improve your tear film quality.
For chronic or severe dry eye cases, prescription medications like Restasis or Xiidra can help reduce inflammation and increase your natural tear production over time. Eye Doctor Remil Simon specializes in advanced dry eye disease management, while Eye Doctor Ahmed Nasrullah brings extensive experience in treating chronic ocular surface disease. For patients who do not respond well to drops alone, punctal plugs, which are tiny devices inserted into the tear drainage openings, can be placed to keep more moisture on the eye surface and provide longer-lasting relief.
Frequently Asked Questions
Patients often have specific questions about dry eye causes and management. Here are answers to some common concerns that may help you better understand your symptoms.
Yes, not drinking enough water throughout the day can reduce both the quantity and quality of your tears, making dry eye symptoms more noticeable. Your body needs adequate hydration to produce healthy tears that properly lubricate your eyes. Aim to drink water consistently throughout the day, especially in hot weather or when you are physically active, to support optimal tear production.
Dry eye symptoms often worsen during certain seasons, particularly cold, windy winters and hot, dry summers. Both low humidity and wind speed up tear evaporation, while indoor heating and air conditioning further reduce moisture in the air. Using a bedroom humidifier during winter months, wearing wraparound sunglasses outdoors, and being more diligent with artificial tears during seasonal transitions can help you maintain more comfortable eyes year-round.
Heavy eye makeup, especially eyeliner and mascara applied along the inner eyelid margin, can block the oil glands that keep your tears from evaporating. Eyelash extensions and the adhesives used to apply them can also clog these glands or trigger allergic reactions that irritate your eyes. If you notice dry eye symptoms that coincide with new cosmetics or extensions, try removing them for a week or two to see if your symptoms improve, and always remove all eye makeup completely before bed.
Your diet can definitely influence the quality of your tears. Foods rich in omega-3 fatty acids, such as salmon, sardines, flaxseeds, and walnuts, help reduce inflammation and support healthy tear production. Some studies suggest that a balanced diet with adequate omega-3s may improve dry eye symptoms over time. If you do not get enough omega-3s from food, consider asking your doctor about high-quality fish oil or flaxseed oil supplements.
You should schedule an appointment if your symptoms last longer than a week despite using over-the-counter treatments, if the discomfort interferes with reading or other daily activities, or if you experience significant pain or vision changes. Early professional evaluation helps identify the specific cause of your dry eye, prevents potential complications like corneal damage, and allows your eye doctor to recommend more effective treatments tailored to your individual needs.
Expert Dry Eye Care in Northern Virginia
At Dulles Eye Associates, we understand how frustrating dry eye symptoms can be and how much they can affect your quality of life. Our team of fellowship-trained ophthalmologists and our experienced optometrist use advanced diagnostic tools and the latest treatment technologies to identify the root cause of your dry eye and develop a personalized care plan. With convenient locations throughout the DC Metro Area and over 800 patient reviews averaging 4.5 stars, we are here to help you find lasting relief and protect your vision for years to come.
Dr. Dar is the absolute best! Explains procedures clearly, attentive, and responds quickly to concerns. Thinks out of the box and diagnosed the root cause of long-term dry eye pain. Highly recommend.
penny boyanton
Dr. Simon and staff were helpful and professional. Tiny eye tubes were placed to treat my dry eye condition—after a short adjustment, it’s working, and I haven’t needed eye drops. Thanks, Dr. Simon!
Lissa Moy
I love this eye doctor's office! Diana E. went above and beyond to provide a great experience and top-notch service. They even remember your face! So glad I came here.
Josh Jenkins
All went well, and everyone was just lovely. Dr. Simon very expert, and gave good medical advice. Thanks to everyone!
Margaret Boone Rappaport PhD
I have visited this practice several times, specifically seeing Dr. Dar. You never feel rushed, and they make you feel important as a patient. I highly recommend them.
Michelle Garrison