1. Xanthelasma: Yellow or orange raised patches on the eyelids, associated with high cholesterol levels. Indicates the need for a healthy diet and exercise.

2. Jaundice: Yellowing of the whites of the eyes due to bilirubin buildup. Commonly seen in patients with liver dysfunction. 

3. Bloodshot eyes: Redness caused by blood vessel congestion in the conjunctiva.

Can be a sign of high blood pressure or platelet deficiency, not just from lack of sleep. 

4. Sudden vision loss: Result of blood supply issues to the eyes or brain, often seen in stroke or migraine patients. Requires immediate evaluation by a medical professional.

5. Bulging eyes: Can be a symptom of hyperthyroidism or Graves' disease, an autoimmune disorder mostly affecting women.