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Kerataconus occurs when the cornea progressively thins and causes a cone-like bulge to develop on the eye. See a doctor immediately if you have any of these symptoms. If you suddenly start seeing halos or colored rings around lights, it could be a sign of acute glaucoma. Symptoms of acute glaucoma usually appear suddenly. One type of glaucoma known as acute-angle closure glaucoma is considered a medical emergency. Glaucoma is a leading cause of blindness in the United States. Glaucoma is a condition caused by optic nerve damage related to high pressure in the fluid circulating in the front of the eye. The abnormalities in the cornea can cause someone with Fuchs’ dystrophy to see halos around lights.įuchs’ dystrophy is usually inherited, and symptoms don’t usually appear until people reach their 50s or 60s. Fuchs’ dystrophyįuchs’ dystrophy is an eye disorder that causes the clear layer on the front of your eye (cornea) to swell. Seeing halos around lights can sometimes be a side effect of the new lens. Clouding of the lens can cause diffraction of light entering the eye, which means you’ll see halos around light sources.Ĭataract surgery involves replacing your cloudy lens with a custom intraocular lens (IOL). Cataracts develop slowly and are common in older people. These include: CataractsĪ cataract is a cloudy area that forms in the lens of the eye. There are many eye conditions that can cause this to happen. Halos around lights are caused by diffraction, or bending of the light entering your eye.

If you’re seeing halos around lights, it’s a good idea to schedule an appointment with an ophthalmologist or optometrist (eye doctor) so they can properly examine your eyes and find out if there is an underlying cause. The halos are a result in diffraction of light entering your eye. People who are developing an eye condition known as cataracts, for example, may start seeing halos due to changes in the lens of the eye. However, if the halos appear suddenly, are very bothersome, or they’re accompanied by pain, blurred vision, or other symptoms, they could be a sign of a serious eye disorder. Halos can also be caused by wearing eyeglasses or corrective lenses (contact lenses), or they can be a side effect of cataract or LASIK surgery. Halos can sometimes be a normal response to bright lights. These bright circles of light around a light source are often referred to as “halos.” Halos around lights are most often noticed at nighttime or when you’re in a dimly lit room. Seeing bright circles or rings around a light source, like a headlight, can be a cause of concern.