Hi Katie I am Dr Bilal and I am an Ophthalmologist Welcome to Health Care Magic I would like to answer your question and your satisfaction is my goal . As you have mentioned in the history that there is an early stage of growth of new vessels over your eye and that too after using your old type contact lenses and that too used after an year . Yes this is the main reason for these new blood vessels formation in two weeks time . I would like to highlight here is that it is corneal neovascularization . It is basically the formation of new vessels due to poor / inadequate oxygen supply to cornea which derives its oxygen supply from atmospheric air . Older hydrogel contact lens materials such as HEMA (2-hydroxy-ethyl methacrylate) have a relatively low oxygen transmissibility so the cornea is deprived of oxygen which leads to ingress of blood capillaries into the clear cornea to satisfy that oxygen demand . I would suggest you to use glasses instead of contact lens . If at all you want to use contact lens , then discuss it with your Ophthalmologist , who should prescribe you with modern rigid gas permeable and silicon hydrogel contact lenses , which have a much higher level of oxygen transmissibility and helps prevent corneal neovascularization . Wish you good luck . Best Regards .