Webbing in inner corners of eyes - do I need more steroid injections or revision surgery? (Photo)

Hi I have webbing after an upper blepheroplasty. I’ve already had a steroid injection and it hasn’t improved. The injection has also caused some yellow discolouration to the area. My question is do I need more steroid injections? Will this help resolve the webbing? I’m concerned about more discolouration if I get more. Would it reduce over time? Or do I need revision surgery? I’m also interested to know why webbing happens. I’ve been told it’s been due to scarring and that the scar has continued to grow as this is my bodies way of healing. But I can see from research it can also be causeby taking the incisions too far into the inner corners.