Red eyes are extremely common and often result from harmless causes such as dryness, allergies, irritation, or lack of sleep.
However, persistent redness can sometimes be linked to:
Conjunctivitis
Dry-eye disease
Inflammation inside the eye
Injury
Contact-lens complications
Redness becomes more concerning if it is accompanied by severe pain, sensitivity to light, discharge, headache, or reduced vision.
3. Blurred or Changing Vision
