Could Dry Eyes Be a Sign of COVID-19? What You Need to Know

It’s been a few years since the world first heard about COVID-19, and we’ve learned so much more about its symptoms than we ever thought possible at the beginning. While the usual suspects like fever, cough, and fatigue remain top of mind for many, researchers are uncovering a wider range of potential indicators. One such surprising connection is between COVID-19 and dry eyes. You might be thinking, “Dry eyes? Really?” It sounds unusual, but the science is starting to paint a clearer picture. Understanding Dry Eyes Before we dive into the COVID-19 link, let’s quickly recap what dry eyes actually are. Simply put, dry eye disease (DED) happens when your eyes don’t produce enough tears, or when the tears they do produce evaporate too quickly. This leaves the surface of your eyes unprotected and can lead to a whole host of uncomfortable sensations. Think of tears as your eyes’ natural lubrication system. They keep your eyes moist, clear away debris, and protect them from infection. When this system is disrupted, you can experience: A gritty or sandy feeling, like something is stuck in your eye. Burning or stinging sensations. Redness and irritation. Blurred vision, especially when reading or using screens. Sensitivity to light. Watery eyes (yes, paradoxically, your eyes might produce more tears to compensate for the dryness!). Discomfort when wearing contact lenses. Dry eyes are quite common, especially as we get older. Many people over 50 experience this condition. However, it’s not just an age-related issue. Factors like environmental conditions (windy, dry air), prolonged screen time, certain medications, and underlying health conditions can all contribute to dry eyes. The COVID-19 Connection: What the Research Says Now, let's get to the heart of the matter: how does COVID-19 fit into this picture? While dry eyes aren't typically listed as a primary symptom like fever or cough, studies suggest they can indeed be an indicator for some individuals. A significant review of studies published in early 2021 looked at a large group of people who had COVID-19. What they found was quite interesting: approximately 1 in every 10 people with COVID-19 experienced some form of eye symptoms. Among these eye-related issues, dry eyes or the sensation of a foreign object in the eye was the most frequently reported. It appeared in about 1.7% of all COVID-19 cases studied. That might sound like a small percentage, but it’s notably higher than what might be expected in the general population without the virus. So, why might the SARS-CoV-2 virus, the one that causes COVID-19, lead to dry eyes? The exact mechanism isn’t fully understood, but scientists have a leading theory. The virus is known to enter cells in our body by latching onto a specific enzyme called ACE2 (angiotensin-converting enzyme 2). Research has shown that these ACE2 receptors are present on the surface cells of our eyes. This suggests that the virus could potentially affect the eyes directly, possibly impacting tear production or the health of the eye’s surface. Is it Just COVID-19? Other Factors Contributing to Dry Eyes During the Pandemic It's important to remember that the pandemic brought about many lifestyle changes that could also contribute to dry eyes, even if you don't have COVID-19. Increased Screen Time: With many of us working, studying, and socializing virtually, our screen time has skyrocketed. When you stare at a screen for long periods, you tend to blink less frequently. Blinking is essential for spreading tears across your eyes. Less blinking means less moisture, leading to dryness. Mask Wearing: You might have noticed your eyes feeling drier when wearing a mask. If your mask doesn't fit snugly, exhaled air can escape upwards and blow across your eyes, accelerating tear evaporation. This is particularly bothersome for people who already struggle with dry eyes. Therefore, if you're experiencing dry eyes, it's not automatically a sign of COVID-19. It could be due to these common pandemic-related factors, or other unrelated reasons. Symptoms to Watch For While dry eyes can be a symptom, remember that COVID-19 usually comes with a constellation of other, more common signs. If you develop dry eyes along with any of the following, it's worth paying closer attention: Fever or chills Cough (usually dry) Shortness of breath or difficulty breathing Fatigue or extreme tiredness Muscle or body aches Headache New loss of taste or smell Sore throat Congestion or runny nose Nausea or vomiting Diarrhea Diagnosis: How Doctors Figure It Out Diagnosing dry eye disease usually involves a conversation with your doctor and a physical eye examination. They’ll ask about your symptoms, medical history, and any medications you’re taking. They might perform tests such as: Visual Acuity Test: To check your eyesight. Slit-Lamp Examination: Using a special microscope to examine the front of your eye closely. Tear Production Tests: Such as the Schirmer test, where a small strip of paper is placed under your eyelid to measure tear output. Tear Film Break-Up Time (TBUT): This test measures how quickly your tears evaporate. If your doctor suspects COVID-19 might be playing a role in your eye symptoms, they may recommend a COVID-19 test. This is especially true if you have other symptoms suggestive of the infection. Treatment and Management The good news is that both dry eyes and COVID-19 are often manageable. Treating Dry Eyes: Artificial Tears: Over-the-counter lubricating eye drops are the first line of defense. Use them as needed throughout the day. Preservative-free options are best for frequent use. Lifestyle Adjustments: Take breaks from screens (remember the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds). Blink consciously and fully. Use a humidifier in dry environments. Wear wraparound sunglasses outdoors to protect from wind and sun. Prescription Eye Drops: For more severe cases, a doctor might prescribe eye drops that reduce inflammation or stimulate tear production. Punctal Plugs: Tiny devices inserted into the tear ducts to slow down tear drainage. Warm Compresses: Applying a warm compress to your closed eyelids can help improve oil gland function, which is vital for a healthy tear film. Managing COVID-19: For mild to moderate COVID-19, treatment often involves supportive care at home: Rest: Get plenty of sleep. Hydration: Drink lots of fluids. Over-the-Counter Medications: Pain relievers like ibuprofen or paracetamol can help manage fever and aches. Antiviral Medications: In some cases, especially for individuals at higher risk of severe illness, doctors may prescribe antiviral drugs. Prevention: Protecting Your Eyes and Your Health Preventing dry eyes and COVID-19 involves a multi-pronged approach. For Dry Eyes: Practice the 20-20-20 rule religiously. Ensure proper mask fit to minimize air blowing into your eyes. Stay hydrated. Consider using a humidifier, especially during dry seasons. Protect your eyes from environmental irritants like smoke and wind. For COVID-19 Prevention: Vaccination: Stay up-to-date with recommended COVID-19 vaccines and boosters. Hygiene: Wash your hands frequently with soap and water or use an alcohol-based hand sanitizer. Masking: Consider wearing a mask in crowded indoor settings, especially if you are at high risk or if local transmission rates are high. Ventilation: Improve ventilation in indoor spaces when possible. Testing: Get tested if you have symptoms or have been exposed. When to Consult a Doctor It’s always a good idea to seek medical advice if you’re concerned about your symptoms. Specifically, consult a doctor if: Your dry eye symptoms are severe, persistent, or worsening. Your dry eyes are accompanied by other COVID-19 symptoms. You experience sudden vision changes, eye pain, or discharge. You develop emergency symptoms of COVID-19. Seek Emergency Care Immediately If You Experience: Difficulty breathing or shortness of breath Persistent pain or pressure in the chest New confusion Inability to wake or stay awake Pale, gray, or blue-colored skin, lips, or nail beds (this may be harder to see on darker skin tones) These are signs of severe illness and require immediate medical attention. Frequently Asked Questions (FAQ) Can COVID-19 cause permanent eye damage? While COVID-19 can cause various eye symptoms, including dry eyes, most evidence suggests that these symptoms are temporary and resolve with time and treatment. Permanent damage is rare, but it's essential to consult a doctor if you experience severe or persistent eye issues. Are eye drops safe if I have COVID-19? Yes, over-the-counter artificial tears are generally safe and can help alleviate dry eye symptoms, which some people experience with COVID-19. However, always follow the specific instructions for use and consult your doctor if you have any concerns. I have allergies. Could my dry eyes be due to allergies and not COVID-19? It's very possible! Allergies are a very common cause of dry, itchy, and irritated eyes. If your dry eye symptoms occur seasonally or are triggered by specific allergens, it’s more likely to be allergies. However, it’s still best to discuss your symptoms with a doctor to get an accurate diagnosis. In conclusion, while dry eyes might not be the first symptom that comes to mind when thinking about COVID-19, the connection is real for some people. Understanding the potential links, along with other contributing factors

In summary, timely diagnosis, evidence-based treatment, and prevention-focused care improve long-term health outcomes.