I dont necessarily have the disease you call "Retinitis Pigmentosa". But I do have a similar eye disease called Glaucoma, it currently has no treatment and the only thing you can do is slow it down. The disease itself causes damage to the optic nerve and causes vision loss, I forgot what type of glaucoma it is, but I currently use eye drops to stop it's advancement. The eye drops are known as Xalatan (a diluted mix of collyrium I'm pretty sure). I use them daily and do 6 month checkups.

It bugs me in everyday life pretty often, I've been having constant headaches with pressure on my eyes. Even when I don't have headaches, I find it pretty hard to focus on something thats 5 or more meters away from me, even with perfectly fine glasses. Even walking outside causes dizziness because of sunlight. My family always had some sort of bad eye sight, but it's the first time an actual eye disease showed up. ¯\_(ツ)_/¯

edit:: forgot to say, good luck on your presentation :>