Topical Insulin for Glaucoma

This study is testing whether eye drops containing insulin can help protect and improve vision in people with certain types of optic nerve damage. The optic nerve connects your eye to your brain, and when it's damaged, it can cause vision loss. Researchers believe insulin may have a protective effect on these nerve cells. **You may be eligible if...** - You have been diagnosed with glaucoma, NAION (a type of sudden optic nerve damage caused by poor blood flow), or optic disc drusen (deposits on the optic nerve) - You are able to give informed consent **You may NOT be eligible if...** - You are pregnant or breastfeeding - You have other eye conditions causing significant vision loss (such as retinal disease or severe inflammation) - You have been diagnosed with diabetes or glucose intolerance - You are unable to reliably complete vision field tests - You cannot attend the required follow-up appointments Talk to your doctor to see if this trial is right for you.