Thanks Taz, found that site earlier. I've texted her and she appears to have Posterior Vitreous Detachment. She couldn't remember name, just remembered could lose her sight. My hubby had this about 2 years ago, although in a much milder form. They've told her it's not bad enough to require laser treatment yet, but they are going to monitor her. Certainly not good at such a young age, but remember hubby being told it's quite common. He still gets bothered with it from time to time, but just puts up with it. Operation is quite scary. Involves having to lie on your front for quite some time post op.