2025 Guide: Halos Around Lights - Causes, Treatments & Prevention Explained

Noticing halos around lights can be a normal reaction to brightness, but it might also signal underlying eye problems—especially if accompanied by pain or blurred vision. Understanding the causes and treatments can help you protect your eyesight effectively.

Halos appear as glowing rings or circles surrounding light sources, often visible in low-light conditions or at night. While sometimes harmless, they may indicate eye disorders such as cataracts, glaucoma, or corneal issues.

Primary Causes of Halos Around Lights

Halos occur due to the bending or diffraction of light entering your eyes. Common causes include:

Cataracts

Cataracts cause clouding of the eye’s lens, commonly developing with age. This cloudiness scatters light, producing halos and symptoms like blurred vision, night vision difficulties, glare sensitivity, and double vision.

Cataract Surgery Effects

After cataract surgery, some patients experience halos due to the implanted intraocular lens (IOL), though this usually improves over time.

Fuchs’ Dystrophy

This inherited corneal condition leads to swelling and clouding, causing halos, light sensitivity, and vision problems, typically appearing in middle age.

Glaucoma

Glaucoma damages the optic nerve from increased eye pressure. Acute-angle closure glaucoma is a medical emergency, often presenting with sudden halos, eye pain, redness, nausea, and blurred vision.

Keratoconus

A progressive thinning of the cornea causing a cone shape, keratoconus results in distorted vision and halos.

Photokeratitis (Sunburned Eyes)

Excessive UV exposure can burn the cornea, leading to halos, eye pain, sensitivity to light, and blurred vision, usually resolving within days.

LASIK Surgery

Post-LASIK patients may notice temporary halos, which typically diminish within weeks, especially with newer surgical techniques.

Ocular Migraines

These migraines cause visual disturbances including halos, flashing lights, and zigzag patterns alongside headaches.

Corrective Lenses and Dry Eyes

Glasses or contact lenses might cause halos due to lens reflections. Dry eyes scatter light irregularly, producing halos and discomfort.

Effective Treatments for Halos Around Lights

• Migraines: Usually resolve with migraine treatment; preventive medications may be prescribed.
• Cataracts: Surgery to replace the cloudy lens with an IOL is highly effective.
• Glaucoma: Laser surgery or medications to reduce eye pressure are critical.
• Fuchs’ Dystrophy: Corneal transplant or endothelial keratoplasty may be necessary.
• Keratoconus: Managed with rigid gas permeable lenses or corneal transplant in severe cases.
• Post-LASIK: Wearing sunglasses and time usually reduce halos.
• Photokeratitis: Cold compresses, artificial tears, and UV protection aid recovery.

Preventing Halos and Protecting Eye Health

• Shield your eyes from UV rays with sunglasses and hats.
• Maintain good blood sugar control if diabetic.
• Consume a nutrient-rich diet with vitamins A, C, and carotenoids.
• Maintain a healthy weight and avoid smoking and excessive alcohol.
• Schedule regular comprehensive eye exams, especially after age 40.

When to Consult an Eye Specialist

Seek immediate medical attention if halos appear suddenly with symptoms like eye pain, blurred vision, nausea, or sudden vision loss. Early diagnosis and treatment are vital to preserving vision.

Summary

Halos around lights can be a benign occurrence or a sign of serious eye conditions such as cataracts or glaucoma. Regular eye checkups and timely treatment are essential to maintaining clear vision and eye health in 2024 and beyond.

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