My mother has had retinitis pigmentosa for 20 years with severe vision loss, and she is currently taking multivitamins as well as medications for controlled diabetes and high blood pressure. What specific medications or supplements can you suggest to help preserve her remaining vision?

For retinitis pigmentosa (RP), specific supplements like Lutein (10 mg daily) and Omega-3 fatty acids (DHA) are often suggested to help support macular health. While high-dose Vitamin A palmitate (15,000 IU/day) was historically recommended to slow progression, it is not suitable for everyone, especially in advanced stages, and can cause liver toxicity. Because your mother has diabetes and high blood pressure, it is critical to avoid starting any high-dose supplements without consulting her ophthalmologist and primary doctor first, as they can interact with her current medications. Her best approach involves regular eye exams, managing her blood sugar and blood pressure, and utilising specialised low-vision aids.