I have optic neuritis causes by having very poor vision. I also get retina tears from straining to see. I am only 32 and have not been able to see in dim lighting for about 7 years. Colors are no longer as bright as they used to be. I imagine by the time I'm 60 my vision will probably not be corrected with glasses or contacts. Just as our joints and skin the eyes take a decline in over all health as well.