Your vision doesn't fail because your eyes are dry.
It fails because your oil glands have stopped doing their job—
producing the lipid layer that seals moisture in with every blink you take.
Think of your tear film like a three-layer system.
When your glands work correctly, they secrete oil that coats your eye surface and creates a protective seal:
"Tears stay stable. Vision stays clear. You can function normally."
That's the process that's supposed to happen thousands of times per day.
But when the oil solidifies—even slightly—the gland opening gets blocked.
The feedback loop breaks.
Your body keeps producing oil behind the blockage.
But it can't escape.
So pressure builds inside the gland.
The tissue swells. Inflames. Suffocates.
One more month of blockage—one more week without proper heat—
and that gland tissue dies permanently.
"We've been thinking about this backwards for three decades," Dr. Harrison explained.
"Instead of clearing the blockages before glands die, we've been trying to supplement tears while the glands suffocate one by one."
This explains why you might use drops perfectly but still go blind.
Why Xiidra works for three months then stops.
Why you can be "doing everything right" and still lose your vision.
Your glands aren't producing oil.
And no amount of drops can replace oil your dead glands can no longer make.
Your body knows something is wrong.
That's why the burning feels so constant, so unpredictable, so impossible to control.
You're not broken.
Your glands just stopped producing the oil layer your eyes need to survive.
"People who 'fail' at conventional treatment aren't non-compliant," Dr. Harrison realized.
"They're trying to fix the wrong problem."