I'm sorry to hear about the persistent redness in your eye. Since you've been using Lubrex DS Eye Drops, which are designed to relieve dry eye symptoms by lubricating the eye, but the redness has lasted for four days, it’s important to consider a few points:

• Avoid rubbing or touching your eye, as this can worsen irritation.
• Remove contact lenses if you wear them, and avoid using them until the redness resolves.
• Use the eye drops exactly as prescribed, but do not exceed the recommended dosage.
• Protect your eyes from irritants such as smoke, dust, or strong winds.
• Apply a cold compress gently to the closed eyelid to help reduce redness and discomfort.

Since the redness has persisted for several days despite treatment, it could indicate an underlying issue such as infection, allergy, or inflammation that may require a different treatment approach.

I strongly recommend consulting an ophthalmologist (eye specialist) promptly to evaluate your eye condition thoroughly and receive appropriate treatment. If you experience worsening pain, vision changes, discharge, or swelling, seek urgent medical attention.To narrow down potential causes, we will need some more information.I understand you're experiencing redness in your right eye even after using Lubrex DS Eye Drops. To better assist you, could you please provide your age and gender?