Introduction: Why Do I See Halos Around Lights at Night?
Have you ever looked at a car headlight, streetlamp, traffic signal, or shop sign after sunset and noticed a bright ring, glow, or starburst around the light? For some people, it happens occasionally. For others, the halos become strong enough to make driving at night uncomfortable or make ordinary lights appear unusually bright and blurry.
Halos around lights at night are a visual symptom rather than a diagnosis. In many cases, the cause is relatively simple, such as dry eyes, an outdated spectacle prescription, contact-lens problems, or temporary irritation. However, persistent or worsening halos can also occur when the cornea, natural lens, or other structures of the eye are affected.
This is why it is important not to assume that every case of night-time glare means the same thing. A person with dry eye may need ocular-surface treatment, while someone with a cataract may need a lens evaluation. A patient with glaucoma or another eye condition may require a very different approach.
At Sentra Clinic in Malad, Mumbai, the evaluation of visual symptoms begins with understanding what the patient is actually experiencing and examining the eye carefully. The goal is not simply to treat the symptom but to identify the reason behind it and recommend treatment only when it is clinically appropriate.
What Do Halos Around Lights Look Like?
Halos are usually described as rings or circles of light surrounding a bright object. Some people describe them as a soft glow around headlights. Others notice multiple rings, a hazy patch, starbursts, or light streaks extending from a lamp.
The appearance can vary from person to person. You may notice halos only when the surroundings are dark and the light source is bright. For example, a car headlight on a dark road creates a strong contrast, making optical imperfections easier to notice.
Halos may occur with other symptoms, including blurred vision, glare, difficulty seeing road signs, eye fatigue, dryness, watering, redness, or fluctuating vision. If the symptom is new, persistent, or associated with pain, severe redness, nausea, sudden vision changes, or a marked drop in vision, prompt eye evaluation is important.
A useful point to remember is that night vision depends on more than just your spectacle number. The cornea, tear film, pupil, natural lens, retina, and the optical quality of the entire eye contribute to how clearly you see a bright light against a dark background.
Common Causes of Halos Around Lights at Night
There is no single cause of halos. Several eye conditions and temporary factors can create similar symptoms. The most common possibilities are discussed below.
1. Dry Eyes and an Unstable Tear Film The tear film is the thin layer of tears covering the front surface of the eye. It helps create a smooth optical surface. When the tear film becomes unstable, the surface of the cornea can become irregular for short periods, causing fluctuating blur, glare, or halos.
Dry eye is particularly common in people who spend long hours on computers and phones, work in air-conditioned environments, sleep with fans or air-conditioning directed toward the face, or have certain contact-lens habits.
A typical clue is that vision changes after prolonged screen use or improves temporarily after blinking. Burning, grittiness, watering, redness, and a tired feeling around the eyes may also occur.
Treatment depends on the cause and severity. An eye specialist may recommend lubricating drops, eyelid or tear-film care, changes in screen habits, treatment of eyelid inflammation, punctal treatment, or other ocular-surface therapies. Simply buying random eye drops is not always the best solution because persistent symptoms may need a proper examination.
2. Refractive Error or an Outdated Spectacle Prescription Myopia, hyperopia, and astigmatism can affect the quality of night vision. Even a relatively small amount of uncorrected or incorrectly corrected astigmatism may become more noticeable around headlights and streetlights.
If your spectacle prescription has changed, your glasses are scratched, your lenses have poor optical quality, or you are not wearing the prescribed correction consistently, bright lights may appear less sharp at night.
Astigmatism is especially relevant because an irregular corneal shape can cause light to spread in more than one direction. Instead of seeing a clean point of light, you may see a blur, streak, ghost image, or halo.
A comprehensive eye examination can determine whether your current prescription is appropriate and whether the symptom is coming from a simple refractive issue or something else.
3. Contact Lenses Contact lenses can sometimes contribute to glare and halos, particularly when the lenses are dry, poorly fitted, worn for too long, or not maintained correctly. Deposits on a lens can reduce optical quality. A lens that does not remain properly positioned can also affect the quality of vision.
Some people notice that their eyes feel dry or irritated toward the end of the day and that night vision becomes less comfortable at the same time. Sleeping in lenses when the lens is not specifically approved for overnight wear can increase the risk of serious complications.
If you wear contact lenses and suddenly develop pain, marked redness, light sensitivity, discharge, or a significant reduction in vision, do not simply remove and reinsert the lens repeatedly. Seek an eye examination promptly.
4. Cataract and Halos Around Lights Cataract is another important cause of glare and halos, particularly in adults who notice that night driving has become more difficult over time. A cataract occurs when the natural lens inside the eye becomes cloudy or develops changes that reduce the quality of light passing through it.
People with cataract may describe headlights as excessively bright, washed out, or surrounded by halos. They may also experience blurred vision, faded colours, difficulty reading, frequent spectacle-power changes, or a general feeling that vision is not as clear as it used to be.
Not every person with cataract needs immediate surgery. The decision is usually based on how much the cataract affects daily life, work, reading, mobility, driving, and overall visual function.
Sentra Clinic provides cataract evaluation and micro-incision phacoemulsification, with lens options selected according to the patient's visual needs and eye health. For more information, see the internal page: Cataract Surgery in Malad, Mumbai.
5. Corneal Conditions The cornea is the transparent front surface of the eye and contributes significantly to focusing light. Any condition that changes its clarity or shape can affect the way light enters the eye.
Corneal scars, infections, irregular astigmatism, keratoconus, pterygium, and other corneal disorders may cause glare, halos, ghost images, or reduced visual quality.
Keratoconus deserves special attention because it changes the shape and strength of the cornea over time. Patients may notice increasing astigmatism, frequent prescription changes, distorted vision, or difficulty achieving clear vision even with glasses.
A corneal evaluation can include slit-lamp examination and, when indicated, corneal topography or tomography. At Sentra Clinic, cornea and refractive services include assessment and treatment options for keratoconus and other corneal conditions. Internal link: Cornea & Keratoconus Treatment in Malad.
6. Glaucoma and Other Eye Conditions Halos are not the most common symptom of glaucoma, and glaucoma often develops without obvious symptoms. However, certain forms of glaucoma can cause coloured halos, particularly when eye pressure rises suddenly.
Acute angle-closure glaucoma is an emergency. Symptoms can include severe eye pain, sudden blurred vision, coloured halos around lights, headache, nausea or vomiting, and a red eye. These symptoms require urgent medical attention rather than waiting for a routine appointment.
Because glaucoma can damage the optic nerve permanently, regular examinations are important, especially for people with risk factors such as family history, older age, high eye pressure, or certain anatomical features.
Sentra Clinic offers glaucoma evaluation using clinical examination, visual-field testing, OCT-based nerve-fibre assessment, and other tests when appropriate. Internal link: Glaucoma Treatment in Malad,
Mumbai.
7. Halos After LASIK or Other Refractive Surgery Some patients notice glare, halos, or other night-vision symptoms after refractive surgery. These symptoms can be related to pupil size, the optical zone, healing, residual refractive error, dry eye, or other factors. In many patients, symptoms improve as the eyes heal, but persistent or troublesome symptoms deserve assessment.
Modern refractive surgery involves detailed pre-operative screening because night-vision quality is one of the factors considered when deciding whether a patient is a suitable candidate. Corneal topography, tomography, pachymetry, tear-film assessment, pupil assessment, and a full eye examination can help guide the decision.
At Sentra Clinic, refractive options include blade-free LASIK, Contoura Vision, ICL, and other procedures for selected patients. The appropriate procedure depends on the individual's corneal shape, prescription, eye health, lifestyle, and visual goals.
Internal link: LASIK Eye Surgery in Malad, Mumbai.
8. Pupil Size and Low-Light Vision Your pupils naturally become larger in darker environments. A larger pupil allows more light to enter the eye, which is useful in low light but can also expose more of the peripheral optical system.
This is one reason why a person may see more glare or halos at night than during the day. In some individuals, optical imperfections that are barely noticeable in bright conditions become more obvious when the pupil expands.
Pupil behaviour is only one part of the picture. An eye specialist considers pupil size alongside the cornea, tear film, lens, prescription, and overall eye health rather than using pupil size alone to explain a symptom.
When Are Halos Around Lights Normal?
Occasional mild glare around a very bright light does not automatically mean that you have an eye disease. Bright headlights, wet roads, dirty glasses, a dry ocular surface, or temporary eye fatigue can all make light appear less crisp.
The more important question is whether the symptom is persistent, increasing, affecting daily activities, or accompanied by other symptoms.
Consider an eye examination if you regularly notice halos, if night driving has become difficult, if you need to squint to see lights clearly, if your vision is blurry even after blinking, or if your spectacle prescription no longer seems to provide clear vision.
Do not judge the seriousness of a symptom only by how much it bothers you. Some eye diseases can progress quietly, which is why a proper examination is often more useful than trying to diagnose the cause at home.
Warning Signs That Need Urgent Eye Care
Certain combinations of symptoms should not be ignored. Seek urgent ophthalmic assessment if halos appear suddenly with severe eye pain, marked redness, sudden blurred or reduced vision, headache with nausea or vomiting, pronounced light sensitivity, or a rapidly changing visual field.
Sudden flashes, a sudden increase in floaters, or a curtain-like shadow over part of your vision can indicate a retinal problem and require urgent assessment. Internal link: Flashes & Floaters: When to Worry.
Likewise, sudden vision loss in one eye should never be managed by waiting to see whether it improves. Internal link: Sudden Blurry Vision in One Eye.
How an Eye Specialist Diagnoses the Cause
A good evaluation begins with your history. The doctor may ask when the halos started, whether they affect one or both eyes, whether they occur only at night, whether they change after blinking, whether you wear contact lenses, whether you recently changed glasses, and whether you have undergone any eye surgery.
The examination may include visual-acuity testing, refraction, slit-lamp examination, eye-pressure measurement, pupil assessment, corneal evaluation, and dilated retinal examination when indicated.
Depending on the findings, additional tests may include corneal topography or tomography, pachymetry, tear-film evaluation, OCT, fundus imaging, or visual-field testing.
The purpose of testing is not to order every available scan. It is to choose the investigations that answer the clinical question. At Sentra Clinic, patients are evaluated by the doctors themselves, with diagnostic technology used when it adds meaningful clinical information.
Treatment: How Can Halos Around Lights Be Reduced?
Treatment depends entirely on the underlying cause.
If dry eye is responsible, improving the tear film and treating associated eyelid or ocular-surface problems may improve visual quality. If the issue is refractive, updating spectacles or addressing astigmatism may help. Contact-lens problems may require a change in lens type, fit, wearing schedule, or care routine.
If cataract is the cause and vision is significantly affected, cataract surgery may be considered. If a corneal condition is responsible, treatment may range from observation and optical correction to procedures such as corneal cross-linking or corneal transplantation in selected cases.
Patients with glaucoma need treatment directed at controlling eye pressure and protecting the optic nerve. Emergency angle-closure glaucoma requires immediate treatment.
For patients considering refractive surgery, the first step is not choosing the most advanced-sounding procedure. The first step is determining whether surgery is appropriate at all. A detailed eligibility assessment helps the surgeon choose between LASIK, topography-guided correction, ICL, PRK/LASEK, or continued spectacle/contact-lens correction.
Can Eye Exercises Remove Halos?
Eye exercises are often promoted online as a way to correct many vision problems. However, halos caused by cataract, corneal irregularity, significant refractive error, glaucoma, or other structural eye conditions cannot simply be exercised away.
Good visual habits are still useful. Taking regular screen breaks, blinking frequently, keeping lenses and spectacles clean, maintaining appropriate lighting, and addressing dryness can support comfortable vision. But persistent halos should be evaluated rather than treated solely with online remedies.
If you are unsure whether your symptoms are related to eye strain or an underlying condition, a professional examination is the safer route.
Halos, Glare, Starbursts and Double Vision: Are They the
Same? These terms are related but do not necessarily describe the same visual experience.
A halo is usually a ring or glow around a light. Glare refers to discomfort or reduced visual quality caused by bright light. Starbursts are streaks or rays extending from a light source. Ghosting or double vision means seeing an additional faint image.
Different optical problems can produce overlapping symptoms. For example, irregular astigmatism may cause ghosting, while dry eye may cause fluctuating blur and glare. Cataract may cause glare and halos, while certain retinal or neurological conditions can produce other visual disturbances.
Because patients often use these words differently, describing exactly what you see to the eye specialist is helpful. If possible, explain whether the symptom occurs in one eye or both and whether it changes when you cover either eye.
Night Driving and Halos: What Should You Do?
Night driving requires good contrast sensitivity, accurate focusing, and the ability to handle bright headlights in a dark environment. If halos make headlights appear unusually large or blurry, judging distance and reading road signs may become harder.
Do not force yourself to drive at night if your vision is significantly compromised. Until the cause is assessed, consider limiting night driving when you feel unsafe.
A proper eye examination can identify correctable issues such as an outdated prescription, dry eye, cataract, or contact-lens problems. It can also determine whether a more detailed evaluation is needed.
Who Should Get an Eye Check for Night-Time Halos?
You should consider an eye examination if halos are frequent, new, worsening, or interfering with driving, work, reading, or daily activities.
An evaluation is particularly worthwhile if you are over 40, have diabetes, have a family history of glaucoma or other eye disease, have a history of eye surgery, wear contact lenses, have significant refractive error, or have noticed repeated changes in your spectacle prescription.
People with diabetes should maintain regular retinal screening even when vision feels normal because diabetic eye disease may not produce early symptoms. Internal link: Diabetes & Your Eyes.
Why Choose Sentra Clinic for Eye Evaluation in Malad, Mumbai?
Sentra Clinic is a surgeon-led eye hospital in Malad East offering comprehensive ophthalmic care across refractive surgery, cataract, retina, cornea, glaucoma, paediatric ophthalmology, uvea, orbit and ocular-surface care.
The clinic is led by Dr. Rohit Modi and Dr. Shraddha Sureka, with fellowship-trained expertise across retina, cornea, refractive surgery and cataract care. The clinic's approach is to examine the patient carefully, explain the findings clearly, and recommend treatment only when it is appropriate.
For a symptom such as halos around lights, this multidisciplinary approach matters because the same symptom can originate from different parts of the eye. A patient may need a simple refraction, ocular-surface treatment, cataract assessment, corneal imaging, glaucoma evaluation, or another investigation depending on the clinical findings.
Internal link: Eye Specialist in Malad, Mumbai.
Frequently Asked Questions About Halos Around Lights at
Night Q1. Why do I see halos around headlights at night? Halos can result from dry eye, refractive error, astigmatism, cataract, corneal changes, contact-lens issues, or other eye conditions. An examination is needed to identify the cause.
Q2. Are halos around lights a sign of cataract? They can be. Cataract can increase glare and cause halos, particularly around headlights and other bright lights. But halos do not automatically mean cataract.
Q3. Can dry eyes cause halos? Yes. An unstable tear film can temporarily affect the smooth optical surface of the cornea and cause fluctuating blur, glare, or halos.
Q4. Are halos after LASIK normal? Some patients experience temporary glare or halos after refractive surgery. Persistent or troublesome symptoms should be discussed with the treating eye surgeon.
Q5. Can glasses fix halos? If the halos are caused by an uncorrected or incorrectly corrected refractive error, an updated prescription may improve them. If the cause is cataract, corneal disease, dry eye, or another condition, different treatment may be required.
Q6. When are halos an emergency? Halos combined with severe eye pain, a red eye, sudden blurred or reduced vision, headache, nausea or vomiting, or rapid visual change can require urgent assessment.
Q7. Should I stop driving at night if I see halos? If halos significantly reduce clarity or make headlights difficult to manage, avoid driving until your vision has been assessed and you feel safe.
Q8. What tests may be needed? Depending on symptoms, testing may include refraction, slit-lamp examination, eye-pressure measurement, corneal topography/tomography, pachymetry, OCT, retinal examination, or other targeted tests.
Final Takeaway
Halos around lights at night are common, but they should not automatically be dismissed as normal ageing or eye strain. Sometimes the cause is simple and treatable. In other cases, halos can be a clue to cataract, corneal disease, glaucoma, dry eye, refractive error, or another eye condition.
The most useful step is to understand what is causing the symptom rather than treating the appearance of the halo alone. If night vision has changed, especially if the change is persistent or affecting your ability to drive comfortably, schedule a comprehensive eye examination.
At Sentra Clinic, Malad, Mumbai, the ophthalmology team can evaluate the cornea, lens, retina, eye pressure, refractive status, and ocular surface as clinically appropriate and guide you toward the right next step.
