This is often a sign of an eye infection. Anyone who gets this suddenly should go to eye doctor immediately.
The thin red ring around the iris may be caused by irritation or from wearing contacts too long.
i have a blister with a red ring around it
no, Mars does not have a red spot or rings however Jupiter, the largest plant, does have a red spot called the 'Great Red Spot' and it also has a thin ring around it.
it is the chromosphere appears a thin layer of red light around the sunchromosphere
Yes the ring around where it shows how many controllers you have will turn red.
A small red circle on your arm with a white ring around it is most likely ringworm. This is contagious by touch.
So far a true bright red iris does not exist. But there are people working on it.
An infection
The thin red line around the sun during an eclipse is called a chromosphere.
I think that's the fungus 'ringworm'.
I think that's the fungus 'ringworm'.
Food allergy or yeast overgrowth
That sounds like ring worm to me. I am no professional. MRSA, Maybe?