what makes a person who has just woken up from sleep appear with red eyes

Question: what makes a person who has just woken up from sleep appear with red eyes
- Keywords:
  red_eyes
Asked by very20fen to Sally, Mmboyi, Mike, Michael, Jacinta, Gliday, Elkana, Edna, Arnold on 17 Jul 2025.
- Michael Kimwele answered on 17 Jul 2025:
  
  ed eyes upon waking can be caused by various factors, including lack of sleep, dry eyes, allergies, eye strain, or even more serious conditions like glaucoma or infections. Insufficient sleep can lead to dilated blood vessels, making eyes appear red and bloodshot. Dry eyes, due to reduced tear production or evaporation, can also cause redness and irritation. Allergies, eye strain from screen time, or even more serious conditions like glaucoma or infections can also cause red eyes when waking up.

Question: what makes a person who has just woken up from sleep appear with red eyes