eye at night

Overview

Difficulty seeing at night, sometimes called night blindness, is a problem with your eyesight in dim light or darkness. It is not a disease by itself; it is a symptom that something may affect how your eyes adapt to low light. Some people only take longer to adjust when going from bright to dark areas, while others find it almost impossible to see at night.

Yes. Many people experience some trouble seeing at night, especially as they grow older. It is also a common reason why older adults stop driving after dark.

People of all ages can have trouble seeing at night, but it is more common in older adults, people with certain eye conditions, and those who do not get enough vitamin A in their diet.

Symptoms

Common symptoms

• Struggling to see in dim light or at night
• Taking longer than usual to adjust from bright light to darkness
• Difficulty driving at night, especially with headlights from oncoming cars
• Feeling like your vision is blurry or cloudy in low light
• Needing very bright lights to read or see clearly
• Seeing halos around lights at night

Symptoms in children

• Being very cautious or clingy in low-light settings
• Tripping or bumping into things more often at dusk
• Complaining that it is 'too dark' in places that seem okay to others
• Avoiding playing outdoors when the light starts to fade

Symptoms in older adults

• Increased fear of falling at night
• Giving up driving at night because of poor visibility
• Difficulty seeing steps, curbs, or obstacles in dim light
• Needing brighter lighting at home to move safely

Causes

Main causes

• Vitamin A deficiency, which can damage the retina's ability to detect light
• Cataracts, a clouding of the lens that makes light scatter and reduces night vision
• Glaucoma, especially when it affects side and low-light vision
• Retinitis pigmentosa, a rare inherited condition that slowly damages the retina
• Severe myopia (nearsightedness), which makes night vision more challenging
• Diabetes, which can cause diabetic retinopathy and affect how the retina works

Risk factors

• Being older, as the lens and retina naturally change with age
• Following a very restricted diet that lacks vitamin A
• Having a family history of inherited eye conditions
• Having diabetes, cataracts, or glaucoma
• Already having vision problems, such as myopia, that are not fully corrected

When to see a doctor

See a doctor urgently if:

• Sudden, severe difficulty seeing at night or in low light
• Loss of side vision or central vision
• Eye injury or recent eye surgery followed by changes in night vision
• Any combination of eye pain, headache, nausea, or vision loss

Book a routine appointment if:

• Night vision problems that have been getting worse over weeks or months
• Difficulty driving at night that makes you feel unsafe
• Trouble navigating at home in the dark, which raises your risk of falls
• You are due for a regular eye exam and have any concerns about night vision

Diagnosis

A doctor or optometrist will ask about your symptoms, review your medical history, and do a thorough eye exam. They may also check how well your eyes respond in dim light.

Tests that may be done

• Visual acuity test – reading letters on a chart to measure overall clarity
• Refraction test – checking how your eyes focus light to detect myopia or other needed prescriptions
• Slit-lamp exam – a microscope that looks at the front parts of your eye, such as the lens
• Eye pressure test – to help detect glaucoma
• Retinal exam – using drops to widen your pupils and view the retina at the back of the eye
• Dark adaptation test – measuring how quickly your eyes adjust from bright to dark light

What to expect at your appointment

The exam is usually painless and can be done in an outpatient setting. Your eye doctor may use numbing drops for pressure tests or dilating drops that make your eyes sensitive to light for a few hours. They will explain what they find and recommend next steps if they discover a cause.

Treatment

Treatment depends entirely on what is causing your night vision problem. Once your eye care professional identifies the cause, they can suggest a treatment plan. In many cases, treating the underlying condition can improve or even restore night vision. For some causes, the goal is to help you adapt and stay safe in low-light settings.

Self-care at home

• Use brighter, well-placed lights in your home, especially along stairs and hallways
• Wear glasses or contact lenses with an up-to-date prescription when driving or moving in dim light
• Clean your glasses regularly, since smudges make night vision worse
• Reduce glare by wearing anti-reflective lenses or adding a visor in bright headlight conditions
• Add a dim night light in your bedroom and bathroom to make night trips safer
• If you drive at night, slow down, keep the dashboard lights dim, and avoid looking directly at oncoming headlights
• Eat a balanced diet that includes vitamin A-rich foods such as carrots, sweet potatoes, leafy greens, and eggs

Medical treatments

Medical care for night vision problems varies by cause. For example, if cataracts are present, treatment may involve removing the cloudy lens through surgery. If glaucoma is found, treatments may include pressure-lowering eye drops or other procedures. For vitamin A deficiency, a doctor may advise dietary changes or, in some cases, supplements. Always talk to your healthcare provider before starting any treatment or supplement.

When is surgery considered?

Surgery is most commonly considered when cataracts are causing night vision problems. In that case, replacing the cloudy natural lens with a clear artificial one can greatly improve vision in low light. If you have other eye conditions, your doctor will discuss whether surgery is an option for you.

Living with this condition

Living with night vision problems is easier when you plan ahead. Make your environment safer by improving lighting and reducing clutter. If you drive at night, consider avoiding it when you can, or ask someone else to drive. Tell family members and friends so they can support you and help in low-light settings.

Lifestyle tips

• Keep a flashlight or phone light with you when going out after dark
• Schedule activities during daylight hours as much as possible
• Talk to your employer about adjusting lighting in the workplace if needed
• Wear a hat with a brim outdoors in bright sun, but give your eyes a few minutes to adjust when going indoors
• Consider home safety devices like grab bars and motion-sensor lights to reduce fall risks

Diet and exercise

Eating a balanced diet helps keep your eyes healthy. Include foods rich in vitamin A, vitamin C, vitamin E, and zinc. Gentle exercise, like walking during daylight hours, helps overall health, but avoid outdoor activities in low light if you cannot see well.

Mental health and emotional wellbeing

It can be frustrating and worrying to lose confidence in your vision at night. You may feel anxious about driving, going out after dark, or being a burden to others. These feelings are valid. It is important to talk about them with a trusted friend, family member, or counsellor.

Prevention

Some causes of night vision problems cannot be prevented, such as inherited conditions. However, many are preventable or delayed. Eating a diet rich in vitamin A, protecting your eyes from injury, managing conditions like diabetes, and having regular eye exams are all important ways to keep your eyes as healthy as possible.

Screening programmes

Regular eye exams are the best way to catch eye conditions early. If you have diabetes, follow your doctor's advice for eye screening. Older adults should have an eye exam at least every two years, or more often if their doctor recommends it.

Complications

If left untreated

• Increased risk of falls, trips, and injuries at night
• Motor vehicle accidents caused by poor night driving
• Undiagnosed conditions like glaucoma or cataracts can worsen, leading to more serious vision loss
• Loss of confidence and independence, leading to social isolation or depression

Long-term outlook

The outlook for night vision problems is often positive. Many causes, such as vitamin A deficiency and cataracts, can be treated successfully. Even when night vision cannot be fully restored, support and safety strategies can help you live fully and independently. Most people find that with the right help, they can keep doing the things they enjoy.

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