Has anyone figured out the cause? I had a critical illness in November 2022. During the illness I suffered a cardiac arrest. When I woke up from my induced coma and was somewhat alert I found out they added two medications metoprolol and hydralazine. I didn't come home from hospital until December 2022. In January I started seeing bright neon/florescent colors. Like described above, after a nap say a white pillowcase is now bright green. Objects have also shown up closer to me than they really are. I reached out to my ophthalmologist she had me reach out to neuro. My neurologist had me see a neuro ophthalmologist. My appointment was yesterday, he has no idea what the cause is. He is going to research the newer medications and let me know if this could be a side effect.