Olopatadine
"Been using Patanol for years and it worked great until it seemed like my eyes were getting worse. I thought I had extremely dry eye and tried an eye lubricant. After using it for little more than a day, my eyes were bad. Itchy, burned, constantly watering, blurred vision, headaches and I realized That the Patanol recently had been doing the same things. I haven't used any eye drops for about 24 hours and although I still have symptoms, I'm just carefully wiping my eyes, and cold compresses help and trying to avoid anything that strains my eyes. Like typing this. I'm really happy with the Patanol, no problems at all until recently.  seeing all the symptoms of pinkeye.  Patanol is the best thing to treat. I just don't want to get worse again."