This study tests a new eye drop for dry eye disease, called *recombinant human nerve growth factor (rhNGF)*. The study checks if the eye drop helps more than a placebo (a treatment with no active medicine). People in the study will put one drop in each eye three times a day for 4 weeks. There are 5 visits over 8 weeks, where doctors check your eyes and ask questions. Dry eye disease is when eyes feel dry, sore, or like something is in them.

• Study lasts for 8 weeks with 5 visits to the clinic.
• Participants must use the eye drops three times daily for 4 weeks.
• Participants must be 18+ and have had dry eye for over 6 months.

If you choose to join, you must be able to follow study instructions and cannot have eye infections or other serious eye problems. Also, you cannot be pregnant or plan to become pregnant during the study. The goal is to see if the new eye drops are safe and help treat dry eye symptoms better than a placebo. Before joining, you must read and sign a consent form to understand the study and agree to take part.