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Home » News » What Causes Halos Around Lights?

What Causes Halos Around Lights?

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Pierce Family Vision Local Cataract, Astigmatism, Fuch’s Dystrophy and Glaucoma Eye exams and treatment near you in Waterloo, Ontario

Have you ever seen bright rings or “halos” around sources of light? Read on to learn what can cause halos and when they’re a reason to visit an eye doctor near you.

For local Management of Ocular Diseases near you in Waterloo, Ontario

Seeing bright rings or “halos” around sources of light can either be normal or a cause for concern. Below, we’ll explain the most common reasons that people see halos and when you should visit your eye doctor.

We see halos around light fixtures and headlights when light entering the eye from a bright object is bent in an unusual way. This causes the bright light to appear as if it is surrounded by a ring of light, known as a halo. Several conditions can cause light to bend in this way.

  • CataractsA cataract is a clouding of the eye’s natural lens. Cataracts usually develop slowly and are most often seen in older people.

    When the lens becomes cloudy, light is dispersed abnormally as it enters the eye and causes a person to see halos around lights. In fact, seeing halos around lights is one of the most common symptoms of cataracts. Other symptoms that may accompany cataracts are blurred vision, light sensitivity, and difficulty seeing at night.

  • AstigmatismThis eye condition occurs when the cornea (the front surface of the eye) is irregularly curved. People with astigmatism may see halos around lights because of the way the cornea refracts incoming light.
  • Fuch’s Dystrophy This progressive genetic disease causes the cornea to swell. As the cornea swells and becomes misshapen, it causes light to enter at an incorrect angle. As a result, people with this condition see halos around lights.
  • GlaucomaGlaucoma occurs when the optic nerve becomes damaged due to high inner eye pressure, and is a leading cause of blindness worldwide. Seeing halos around lights can be an early sign of acute glaucoma, which is considered a medical emergency.

    If you suddenly start seeing halos around lights in addition to other symptoms like headache, vomiting, blurred vision, eye pain, and weakness, seek medical care without delay.

  • Dry Eye SyndromeDry eye syndrome occurs when the eyes are chronically dry. In moderate to severe cases, the eye’s surface can become irregularly shaped, which can cause light to enter at an odd angle.

When To Visit Your Eye Doctor

If you see halos around lights, it’s best to schedule a timely eye exam at an eye clinic near you, even if you suspect you know why it’s happening.

A comprehensive eye exam by a qualified eye care professional is the only way to rule out a serious problem.

Many eye diseases can be quickly and easily diagnosed during a Comprehensive eye exam, Pediatric eye exam and Contact lens eye exam. If you were diagnosed with an eye disease, such as Cataracts, Pink Eye or conjunctivitis Myopia or Nearsightedness , Glaucoma, Macular degeneration, Diabetic retinopathy, or Dry eye, you may be overwhelmed by the diagnosis and confused about what happens next. Will you need medications or surgery – now or in the future? Is LASIK eye and vision surgery an option for you ? Our Waterloo eye doctor is always ready to answer your questions about eye disease and Contact lenses.

Book an eye exam at Pierce Family Vision eye clinic near you in Waterloo, Ontario to learn more about your candidacy for contact lenses and which type is right for you. Call 519-886-4170

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  • What is a cataract? How will I know when I have one? What can be done to fix it?

    A cataract is a clouding of the crystalline lens. The crystalline lens sits behind the iris or the colored part of the eye. Its function is to fine-tune our focusing system by changing shape as we view objects at different distances. Our lens eventually loses its ability to change shape; this is when we require reading glasses or bifocals. In addition, the crystalline lens can become cloudy or yellow as a part of normal aging. This is also known as an age-related cataract. Normal, age-related cataracts are unavoidable and everyone will develop them at some point if they live long enough. The discoloration of the lens leads to an overall blur, a decrease in contrast sensitivity, and a worsening of glare, especially at nighttime. Because they tend to develop gradually, the symptoms are often unnoticed by the patient. A yearly eye exam will allow your optometrist the opportunity to identify cataracts and advise on how to proceed. When your optometrist decides your cataracts are affecting your vision and are advanced enough to remove, you will meet with an ophthalmologist. Cataract surgery is a safe and effective outpatient procedure that will reverse any vision loss caused by cataracts, and it is usually covered by your medical insurance.

  • My previous eye doctor told me I have “stigma!” Am I going to go blind?

    Stigma is actually referring to a type of refractive error known properly as astigmatism, and no, you will not go blind from having astigmatism; it is not a disease, in fact, it is relatively common. There are three types of refractive error, myopia, hyperopia, and astigmatism. The former two are more regularly referred to as nearsighted (cannot see far away) and farsighted (cannot see up close). Astigmatism is simply the third category; it affects both the near and far vision at the same time. Much like nearsightedness or farsightedness, astigmatism is corrected using glasses or contacts. Technically speaking an eye with astigmatism requires two different prescriptions to correct vision in one eye due to the more oval shape of the cornea. This will require a more specialized contact lens and a more in-depth fitting procedure. Nonetheless, your eye care provider can, and will, correct your astigmatism with glasses and/or contacts.

  • What exactly is glaucoma?

    Glaucoma is a condition in which the eye's intraocular pressure (IOP) is too high. This means that your eye has too much aqueous humor in it, either because it produced too much, or because it's not draining properly. Other symptoms are optic nerve damage and vision loss. Glaucoma is a silent disease that robs the patient of their peripheral vision. Early detection is very important.

  • My eyes are always burning and tired, what is causing this and what can I do about it?

    A cataract is a clouding of the crystalline lens. The crystalline lens sits behind the iris or the colored part of the eye. Its function is to fine-tune our focusing system by changing shape as we view objects at different distances. Our lens eventually loses its ability to change shape; this is when we require reading glasses or bifocals. In addition, the crystalline lens can become cloudy or yellow as a part of normal aging. This is also known as an age-related cataract. Normal, age-related cataracts are unavoidable and everyone will develop them at some point if they live long enough. The discoloration of the lens leads to an overall blur, a decrease in contrast sensitivity, and a worsening of glare, especially at nighttime. Because they tend to develop gradually, the symptoms are often unnoticed by the patient. A yearly eye exam will allow your optometrist the opportunity to identify cataracts and advise on how to proceed. When your optometrist decides your cataracts are affecting your vision and are advanced enough to remove, you will meet with an ophthalmologist. Cataract surgery is a safe and effective outpatient procedure that will reverse any vision loss caused by cataracts, and it is usually covered by your medical insurance.