Halos are often normal responses to bright lights. They can also come about by wearing eyeglasses or contact lenses, or they can arise as a side effect of cataract or LASIK surgery.

When light bends as it enters your eye — called diffraction — your eyes perceive that halo effect. This can be caused by a number of different things. Sometimes it’s a response to bright lights, especially if you wear glasses or contact lenses to correct nearsightedness, farsightedness or astigmatism.

What causes you to see rings around lights?

Seeing halos around lights is a result of diffraction, an effect that occurs when the light bends while entering the eye. Diffraction can sometimes be caused by glasses and contact lenses, but it can also be a disease’s side effect.

What does it mean when you see circles in your vision?

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