Blurred Vision With Rainbow Colors In My Periferal Along With

Blurred vision with rainbow colors in my periferal along with weak and tight leg muscles that are real sore and almost numb when I get up from sitting down and then gets better after walking about 10 - 20 steps. I am 6'0" and weigh 260 lbs. and had left knee replacement surgery 8 months ago which is doing great.