Your eyes do more than help you see—they also act as a window to your overall health. Many systemic conditions such as high cholesterol, stress, hypertension, vitamin deficiencies, and diabetes can show early signs through your eyes. 1. Xanthelasma: Yellowish Deposits Around the Eyelids. 2. Eyelid Twitching: A Sign of Stress and Fatigue. 3. Sudden Worsening of Dark Circles. 4. Subconjunctival Hemorrhage: Sudden Red Patch in the Eye. 5. Sudden Blurred Vision: A Critical Warning Sign.