Adequate hydration supports the production and balance of tears and helps maintain overall eye comfort. Dehydration can contribute to dry, tired‑feeling eyes.
Effects on the Ocular Surface
When the body is short of fluid, tear volume and composition may be affected, leading to increased evaporation and irritation. People often notice more dryness in hot weather, during illness, or with high caffeine or alcohol intake.
- Hydrated tissues are better able to maintain a stable tear film
- Medication with diuretic effects can influence tear volume
- Screen use and air‑conditioned environments may compound dryness
- Contact lens comfort often improves with good systemic hydration
Practical Tips
Drinking fluids regularly throughout the day, alongside targeted eye treatments where needed, helps support ocular comfort. Water is usually the best choice, with adjustments for activity level and climate.
- People with heart or kidney disease should follow tailored fluid advice
- Hydration alone rarely cures dry eye but contributes to overall management
- Monitor urine colour as a simple indicator of hydration status
- Combine hydration with environmental and lid‑care strategies for best results
