I'm sorry to hear that your eye has been red for several days. Eye redness can be caused by various factors such as irritation, dryness, infection, or allergies.

Here are some steps you can take:

• Avoid rubbing your eye to prevent further irritation.
• Use a clean, cool compress to soothe discomfort.
• Maintain good hygiene, especially if you wear contact lenses.
• Over-the-counter ophthalmic lubricants like eye drops containing hypromellose can help if dryness is the cause. However, these should be used under medical advice.
• If you experience pain, vision changes, discharge, or if the redness persists beyond a few days, it is important to see an ophthalmologist (eye specialist) promptly.

Since your redness has lasted for three days, I recommend consulting an ophthalmologist to determine the exact cause and receive appropriate treatment. If symptoms worsen or you experience severe pain or vision loss, seek emergency care immediately.