vision at night
Informed by recognized medical guidance
Overview
Night vision is your ability to see in low light or darkness. Many people have some trouble seeing clearly at night, but for some, the problem is more serious and can affect safety and quality of life. This article explains why night vision can get worse, what can be done about it, and when to get help.
Key facts
- Night vision naturally declines with age, but sudden changes are not normal.
- The eye needs a few minutes to adapt to darkness, and some people adapt more slowly.
- Many causes of poor night vision are treatable, but early evaluation is important.
Yes. Many people experience some difficulty seeing at night, especially after age 50. It is a common reason for visits to eye clinics and optometrists.
Night vision problems can affect anyone, though they become more common in older adults. People with certain eye conditions, like cataracts or glaucoma, and those with diabetes are more likely to have trouble seeing at night.
Symptoms
- Sudden loss of vision in one or both eyes
- Flashes of light with a sudden increase in floaters or a shadow across your vision
- Severe eye pain with nausea or headache
- ⚠Sudden worsening of night vision over a few days
- ⚠Eye pain, redness, or discharge with night vision changes
- ⚠Seeing a curtain or dark patch in your field of view
Common symptoms
- Difficulty seeing while driving at night
- Trouble seeing in dimly lit rooms or outdoors after sunset
- Struggling to adjust when moving from a bright area to a dark one
- Seeing halos or glare around lights at night
- Needing much brighter light to read or see clearly
Symptoms in children
- Complaining they cannot see in the dark or fear the dark more than usual
- Tripping or bumping into things in low light
- Difficulty see at night after playing outside until dusk
Symptoms in older adults
- More time needed for eyes to adjust when going from light to dark
- Increased risk of falls in dimly lit areas
- Difficulty recognising faces or objects in poor light
Causes
Main causes
- Cataracts – clouding of the eye's natural lens
- Glaucoma – pressure damage to the nerve at the back of the eye
- Retinitis pigmentosa – an inherited condition affecting the retina
- Vitamin A deficiency – important for cells in the retina that help you see in low light
- Diabetes-related eye disease – damage to the retina from high blood sugar
Risk factors
- Age over 60
- A family history of eye conditions like glaucoma or retinitis pigmentosa
- Diabetes, especially if blood sugar levels are not well controlled
- Smoking and heavy alcohol use
- Certain medications that can affect night vision (talk to your doctor about side effects)
When to see a doctor
See a doctor urgently if:
- If your night vision suddenly gets much worse
- If you see flashing lights, a sudden shower of floaters, or a dark shadow across your vision
- If night vision problems are accompanied by eye pain, headache, or nausea
Book a routine appointment if:
- If you have been struggling with night vision for a while and it affects daily activities like driving
- If you have a condition like diabetes and notice changes in your vision
- As part of regular eye examinations, even if you have no symptoms
Diagnosis
A healthcare professional, usually an optometrist or ophthalmologist, will ask about your symptoms and medical history. They will then perform a series of painless eye tests to check how well you see at different light levels and examine the health of your eyes.
Tests that may be done
- Visual acuity test – reading letters on a chart in normal light and in dim light
- Pupil response test – checking how your pupils react to light
- Slit-lamp exam – a microscope that lets the doctor look at the front of your eye
- Retinal exam – after dilating (widening) your pupils, the doctor looks at the back of your eye
- Contrast sensitivity test – checking how well you see objects against backgrounds in low light
What to expect at your appointment
Most eye tests are quick, painless, and done in the clinic. Your pupils may be dilated, which makes your vision blurry and sensitive to light for a few hours, so you may need someone to drive you home.
Treatment
Treatment for night vision problems depends on the cause. For many people, simple changes like using brighter lighting or wearing glasses with an anti-glare coating can help. For others, treating the underlying condition is key. A healthcare provider will guide you based on your specific diagnosis.
Self-care at home
- Use brighter lamps and nightlights in hallways, stairs, and bathrooms
- Wear sunglasses during the day to protect your eyes and reduce glare at night
- Keep the windshield and headlights of your car clean
- Avoid driving at night if you feel unsafe or struggle to see clearly
- Give your eyes time to adjust when moving between bright and dark places
Medical treatments
Medications may be used to treat underlying conditions such as glaucoma or diabetes-related eye disease. These are prescribed by a doctor and should never be shared with others. Always follow your doctor's instructions. For some conditions, vitamin supplements may be recommended if there is a proven deficiency, but do not start supplements without medical advice.
When is surgery considered?
Surgery may be an option for cataracts, which is a common cause of night vision problems. Cataract surgery involves replacing the cloudy lens with a clear artificial one. Your eye specialist will discuss whether surgery is right for you.
Living with this condition
Living with poor night vision means planning ahead. Use extra lighting at home, keep a torch near your bed, and consider using assistive tools like magnifiers with built-in lights. If driving at night is difficult, try to limit or avoid it, especially on unfamiliar roads.
Lifestyle tips
- Keep your eyeglasses prescription up to date
- Install motion-sensor lights outside your home
- Use high-visibility tape on step edges
- Eat a balanced diet rich in leafy greens and colourful vegetables
- Quit smoking to protect your overall eye health
Diet and exercise
A healthy diet supports good eye health. Foods high in vitamin A, such as carrots, sweet potatoes, and spinach, may help maintain retinal function. Regular physical activity also improves blood flow to the eyes and helps manage conditions like diabetes, which can harm vision.
Mental health and emotional wellbeing
Struggling with night vision can be frustrating and can make you feel anxious or isolated, especially if you have to stop driving at night. These feelings are valid. Talk to your doctor about how your vision is affecting your wellbeing, and consider joining a support group for people with visual impairment.
Prevention
Not all causes of poor night vision can be prevented, but many can be delayed or managed. Regular eye examinations, protecting your eyes from bright sun, controlling blood sugar, and not smoking are the most effective steps you can take.
Screening programmes
Regular eye screening is especially important if you have diabetes or a family history of eye disease. An eye exam can detect early signs of cataracts, glaucoma, and retinal conditions before you notice symptoms.
Complications
If left untreated
- Increased risk of falls and injuries at night
- Difficulty driving safely, which can lead to accidents
- Worsening of underlying eye conditions if not diagnosed and treated
- Reduced independence and quality of life
Long-term outlook
The outlook depends on the cause, but the news is often good. Many night vision problems can be corrected with glasses, brighter lighting, or treatment of an underlying condition like cataracts. Even for more serious conditions, early diagnosis and support can help you maintain your independence and safety. With the right care, most people can continue to do the activities they love.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.