I've been wearing contact lenses since the summer. I dunno why I didn't think much of this when I found out almost 2 months ago but on both of my contact lenses (these are yearly ones) there are small circles of brown dirt or build up. I'm not sure whether its just protein build up which has occured havign worn them for the best part of 8 months. I clean them regularly and everything and was wondering if any of you have this problem or know what it is exactly. Thnx alot,
What are the downsides?