What does it mean when you see a blue ring around white lights?

Seeing a blue ring around white lights, often described as halos, can be caused by a variety of factors, including the scattering of light in the atmosphere or through the eyes. This phenomenon can occur due to conditions like astigmatism or cataracts, which affect how light is focused in the eye. Environmental factors, such as humidity or pollution, can also contribute to this effect. If it’s a persistent issue, it's advisable to consult an eye care professional.