Pixie's Eye infection

Here's a photo of Pixie's infected left eye. This is after the treatment this morning.  When I first noticed it and it came about fast, he had blood coloured crusts all the way down to his nose. The pink tissue around the eye was bright red and inflamed. The swelling has gone down and from a distance you can't tell anymore that he's got an infected eye.  Will probably keep treatment for another 5-6 days. He's my oldest cat at 9 years of age.