Do your eyes feel gritty, burning, or tired after staring at your computer screen for a while. Do you blink more often, but the discomfort keeps coming back. You might not be surprised to learn that these symptoms may point to dry eye.
However, you might not know there are actually two distinct types of dry eye, and each requires different approaches to treatment.
The main difference between evaporative and aqueous deficient dry eye lies in what causes your tears to fail: aqueous deficient dry eye happens when your eyes don’t produce enough tears, while evaporative dry eye occurs when your tears evaporate too quickly due to poor oil production.
At Grove Eye Care, we’re here to help you find a dry eye treatment plan that relieves your discomfort.
What Is Dry Eye & How Does It Affect Your Vision?
Dry eye syndrome develops when your tear film can’t properly protect and lubricate your eyes. Your tears consist of three layers that work together: a mucus layer that helps tears stick to your eye, a watery layer that provides moisture and nutrients, and an oil layer that prevents rapid evaporation.
When this tear system breaks down, you may experience uncomfortable symptoms that can interfere with daily activities like reading, driving, or working at a computer.
You might notice:
- Burning or stinging sensations
- Gritty feeling like sand in your eyes
- Blurry vision that comes and goes
- Excessive tearing or watery eyes
- Eye fatigue during reading or screen time
- Sensitivity to light or wind
Aqueous Deficient Dry Eye: When Your Eyes Don’t Make Enough Tears
Aqueous deficient dry eye occurs when your eyes don’t produce enough of the watery layer in your tears. Think of it like a faucet that drips instead of flowing steadily. Your eyes can’t maintain the moisture they need to stay comfortable and healthy.
Your lacrimal glands, located above each eye, normally release tears throughout the day to keep your eyes moist. When these glands slow down or stop working properly, you don’t have enough tears to wash away irritants or keep your eye surface smooth.
Common Causes of Aqueous Deficient Dry Eye
Aqueous deficient dry eye can affect people at any age, though the causes vary by age group and health status.
Autoimmune conditions are a leading cause, particularly Sjögren’s syndrome, which often develops in people in their 30s and 40s. Rheumatoid arthritis, lupus, and thyroid disorders can also damage tear-producing glands. These conditions cause chronic inflammation that reduces tear production over time.
Medications commonly prescribed to younger and middle-aged adults frequently reduce tear production as a side effect. Birth control pills, antidepressants, anti-anxiety medications, antihistamines, and isotretinoin (Accutane) for acne can all significantly decrease natural tear production.
LASIK and other refractive surgeries can temporarily or permanently reduce tear production by cutting corneal nerves that stimulate the lacrimal glands. While many people recover normal tear production within 6-12 months, some experience persistent aqueous deficiency.
Age-related changes do contribute, as tear glands naturally produce fewer tears after age 50. Hormonal changes during menopause also frequently contribute to aqueous deficient dry eye in women.
Evaporative Dry Eye: When Your Tears Disappear Too Quickly
Evaporative dry eye happens when you produce enough tears, but your tears evaporate too quickly due to meibomian gland dysfunction (MGD). MGD accounts for approximately 85% of all dry eye cases, making it far more common than aqueous deficiency.
Tiny oil glands called meibomian glands line your upper and lower eyelids, with about 25-40 glands per eyelid. These glands release oils that spread across your tear film every time you blink, creating a protective barrier that slows evaporation. When these glands become blocked, inflamed, or produce thick poor-quality oil, that protective barrier breaks down.
What Causes Meibomian Gland Dysfunction
Age and Gland Changes
The natural oils produced by meibomian glands become thicker and more viscous with age, making it harder for them to flow out when you blink. This thickening process often begins in your 40s and progressively worsens.
Demodex Mites and Inflammation
Demodex mites—microscopic parasites living in eyelash follicles and oil glands—increase in number as you age, especially after 40. These mites clog gland openings with debris and trigger inflammation that disrupts oil production.
Rosacea and Blepharitis
Rosacea and ocular rosacea cause chronic eyelid inflammation that directly damages meibomian gland function. Blepharitis from bacterial overgrowth creates a similar cycle where bacteria break down oils into irritating fatty acids, further inflaming the glands.
Cosmetics and Skincare
Makeup, eyeliner, and skincare products applied near the lash line can physically block the tiny gland openings. Waterproof or long-wear products are particularly problematic.
Lifestyle Factors
Screen time worsens MGD by reducing your blink rate and completeness. Incomplete blinks don’t properly squeeze oil from the glands. Contact lenses also disrupt how oils spread across your eye surface.
Environmental Triggers
Air conditioning, heating, wind, and low humidity accelerate tear evaporation, but these factors worsen existing MGD rather than cause it. With healthy oil glands, environmental conditions would have minimal impact.
Treatment Options for Each Type of Dry Eye
Many people have mixed dry eye with both aqueous deficiency and MGD simultaneously. Your treatment plan may address both.
Treatments for Aqueous Deficient Dry Eye
Prescription anti-inflammatory drops like Restasis (cyclosporine), Xiidra (lifitegrast), or Tyrvaya nasal spray increase natural tear production, though they require 3-6 months of consistent use to show full effect.
Preservative-free artificial tears (4-6 times daily), punctal plugs to conserve existing tears, and omega-3 supplements (1000-2000mg EPA/DHA daily) support tear production and quality. For severe cases unresponsive to other treatments, autologous serum tears made from your own blood provide growth factors that promote healing.
Treatments for Evaporative Dry Eye (MGD)
At-Home Care: Apply moist warm compress (108-110°F) for 10-15 minutes twice daily to liquefy thickened oils, followed by gentle eyelid massage. Clean eyelids daily with hypochlorous acid spray or lid wipes to remove bacteria and debris.
Professional eyelid cleaning removes stubborn biofilm and debris using devices like BlephEx or NuLids. Combined with other treatments like IPL, LipiFlow, and manual expression, these approaches address both immediate blockages and ongoing prevention.
Environmental Changes: Use a humidifier, position air vents away from your face, wear wraparound sunglasses outdoors, and follow the 20-20-20 rule for screen breaks (every 20 minutes, look 20 feet away for 20 seconds).
When to Seek Professional Help
Schedule an evaluation if symptoms interfere with daily activities, don’t improve with over-the-counter treatments after 2-3 weeks, or if you experience persistent redness, pain, or vision changes.Contact our team at Grove Eye Care in Richmond or Midlothian to schedule a comprehensive dry eye evaluation. Accurate diagnosis leads to targeted treatment that actually works.
