Why does dry eye keep coming back?
The vicious cycle of oil, water, mucin and nerves.
- 01Dry eyes? It's not just a lack of water
- 02Meibomian glands: your eyes' oil factories
- 03Why won't my tears stay put?
- 04Why does dry eye keep coming back?
- 05Health conditions that can dry your eyes
- 06Everyday habits that quietly feed dry eye
- 07“It's just dry eyes”? It's not that simple
- 08Managing dry eye: from home to clinic
- 09In-clinic treatment: IPL, RF & expression
No lid on top, no foundation below
Part 04 · 01No oil layer on top
Water evaporates quickly.
No mucin underneath
Water can't hold on to the surface.
The watery layer can't be maintained
Even while the lacrimal gland keeps producing tears.
Tired nerves: less reflex tearing
Part 04 · 02Normally: feel dry → brain → tears
Corneal nerves are the ‘sensors’ that trigger tears.
Long-term dryness can alter corneal nerves
Some lose sensation, so reflex tearing and protection drop.
Others become oversensitive
Marked pain, yet few dry eye signs on examination.
The vicious cycle of dry eye
Part 04 · 03Inflammation feeds back to the glands. The cycle reinforces itself.
Breaking the cycle: find it and treat it early
Part 04 · 04Find the main driver first
Oil, water or inflammation? Different types need a different focus.
Treat several links at once
Artificial tears alone often address only one part of the cycle.
The earlier, the better
Shrunken or lost glands rarely grow back. Early care preserves more.
Key takeaways
Part 04- 01Without oil and mucin, the watery layer can't hold
- 02Long-term dry eye can alter corneal nerves and reduce reflex tearing
- 03Inflammation feeds back to the glands, closing the cycle
Book an eye surface assessment.
Eyes that often feel dry or gritty, or vision that comes and goes? Find out which type you have and what’s driving it.
General health information only, not personal advice. Everyone’s eyes are different. An optometrist or doctor should examine you before any treatment is decided.