Decreased tear production (Dry eyes)

What are Dry Eyes?
Dry eye syndrome is a highly common condition that occurs when your natural tears aren't able to provide adequate lubrication for your eyes. This happens either if you do not produce enough tears, or if you produce poor-quality tears that evaporate too quickly.

While it has traditionally been most common in older adults due to natural aging, it is becoming increasingly common in teenagers and younger adults due to prolonged, uninterrupted screen time.

Symptoms

Symptoms usually affect both eyes simultaneously and can range from mild annoyance to severe discomfort. They include:

• A persistent stinging, burning, or scratchy sensation (feeling like sand is in your eye).
• Stringy mucus forming in or around the corners of the eyes.
• Watery Eyes: Paradoxically, dry eyes can cause excessive, uncontrollable tearing as the nervous system tries to overcompensate for the underlying dryness and irritation.
• Increased sensitivity to bright light (photophobia).
• General eye redness, heaviness, and fatigue.
• Blurred vision that typically worsens at the end of the day or after prolonged focus.

When to See a Doctor

If you have tried using over-the-counter artificial tears for a few days and still experience prolonged symptoms of red, irritated, tired, or painful eyes, schedule an appointment with an optometrist or ophthalmologist. Do not ignore chronic dry eyes; prompt professional treatment can prevent the condition from causing painful corneal abrasions, minor scarring, or permanent vision changes.

Causes: The 3 Layers of Tears

Your tear film is actually a complex, multi-layered mixture. Problems with any single layer will result in dry eyes:

• Oil Layer (Outer): Produced by the Meibomian glands in your eyelids, this layer smooths the tear surface and prevents evaporation. If these glands are clogged (common in conditions like Rosacea or Blepharitis), the watery tears evaporate far too fast.
• Water Layer (Middle): This thickest layer cleans the eye and washes away foreign particles. Production naturally decreases with age or due to autoimmune conditions like Sjögren's syndrome.
• Mucus Layer (Inner): This sticky layer helps spread the tears evenly over the surface of the eye. Without it, tears would simply bead up like water on a waxed car, leaving dry spots on the cornea.

Other Common Triggers

• Screen Time: Humans naturally blink about 15-20 times a minute. When staring at computers or smartphones, your blink rate drops by half, causing tears to evaporate rapidly.
• Medications: Many common drugs, including antihistamines, decongestants, antidepressants, and blood pressure medications, actively reduce tear production.
• Environment: Wind, smoke, high altitudes, or dry indoor air (from constant air conditioning or heating).
• Laser Surgery: Procedures like LASIK frequently cause temporary, but sometimes severe, dry eyes during the healing process.

Diagnosis

Eye doctors use specific, painless clinical tests to measure both your tear volume and tear quality:

• Schirmer Test: Tiny blotting strips of paper are gently placed under the lower eyelid for 5 minutes. The doctor then measures how much of the strip has been soaked by your natural tears.
• Dye Tests (TBUT): Special eye drops containing a fluorescent dye help the doctor see exactly how long it takes for your tears to break apart and evaporate between blinks.

Treatment

Treatment focuses heavily on adding artificial moisture, conserving the tears you do make, or stimulating natural production.

1. Self-Care & Lifestyle

• The 20-20-20 Rule: Every 20 minutes, look at an object at least 20 feet away for 20 seconds to rest your eye muscles and trigger normal blinking.
• Humidifier: Add moisture to the dry air in your home or office, especially during winter months.
• Warm Compresses: Placing a warm, damp washcloth over closed eyes for 5 minutes can help melt the oils in clogged Meibomian glands.

2. Eye Drops (Artificial Tears)

Over-the-counter lubricating drops are the standard first line of defense. If you need drops more than four times a day, ensure you purchase preservative-free vials to avoid chemical irritation. Tip: Avoid drops that specifically promise to "get the red out," as long-term use actually constricts blood vessels and can worsen dryness.

3. Medications

• Restasis (Cyclosporine) or Xiidra: Prescription daily drops that actively reduce inflammation on the eye's surface, helping your glands produce more of their own natural tears.
• Antibiotics: Oral antibiotics or specialized ointments may be prescribed to treat underlying eyelid inflammation (blepharitis) that prevents healthy oil secretion.

4. Procedures

• Punctal Plugs: A doctor inserts tiny, removable silicone plugs into your tear ducts (the small drains in the corners of your eyes). This blocks drainage, forcing your natural tears to stay on your eyes longer.
• Thermal Pulsation (LipiFlow): An advanced clinical device that gently warms and massages the eyelids to safely melt and clear out blocked oil glands.

Frequently Asked Questions (FAQs)

Can drinking more water cure dry eyes?

While staying properly hydrated is crucial for overall health and absolutely supports healthy tear production, drinking excess water alone usually isn't enough to cure chronic dry eye syndrome—especially if the underlying issue lies in a lack of oil production or rapid evaporation rather than just low water volume.

Does crying help dry eyes?

No. Emotional tears (crying) are predominantly made of water and severely lack the necessary oils and mucus required to properly lubricate the eye. In fact, excessive crying can wash away your eye's natural, healthy tear film, leaving your eyes feeling swollen, sticky, and even more irritated once the crying stops.

References

• American Academy of Ophthalmology (AAO)
• National Eye Institute (NEI) - Dry Eye
• American Optometric Association (AOA)