Hi Amanda, I had this problem for couple of years before my diagnosis. RP is a rare and usually genetic condition. My older sis had it, that's why I suspected it in me. Unfortunately she's now 41 is almost blind,and lost all her peripheral vision. My mum and aunt, both in ther 60s are not so bad and neither am I. I was diagnosed 9 years ago, and only through persistance. It takes specialist testing(i went to Moorfields) to diagnose RP. There are many forms of RP and it doesn't always lead to blindness. In any case, if you suspect a prob, get a referral. There's no treatment or cure at the moment, but research is moving fast! I was told that wearing dark sunglasses can help RP sufferers retain good vision- and it makes you look like a celebrity in disguise! ItThat's what I do.
I still cycle but do need leading about a bit in dim light,(not on the bike!)
Incidentally my mother and aunt were only checked following my diagnosis. They both, in their 50s only had probs in dim light, I remember my mum had night blindness when I was a child. I only sought a diagnosis as I already had children and wanted another, and wanted to make an informed decision.
Jus