My mother's left eye had a cataract and it got operated on last November 18, 2023. She has zero discomfort in her eyes as of now and the doctor also said all was okay. Today her left eye got red all of a sudden since the last few hours and there's minor discomfort. She can see clearly as usual there's no problem with the vision. Is it something concerning? Can it be an after effect of a problem with cataract surgery? She's very scared and kindly let me know. I'm attaching a picture for your reference.