eye screening test preparation

Overview

An eye screening test is a quick, painless check to see how well your eyes work and to find any eye problems early, even before you notice symptoms.

Yes, eye screening is a routine test recommended for most people, especially as you get older or if you have certain health conditions like diabetes.

Eye screening is important for everyone, but it is especially recommended for children to check for lazy eye, older adults to check for age-related problems, and people with health conditions like diabetes or high blood pressure.

Symptoms

Common symptoms

• Blurry or double vision
• Eye strain or headaches after reading or screen use
• Difficulty seeing at night or in dim light
• Squinting or tilting your head to see better

Symptoms in children

• Trouble reading or following along in class
• Sitting too close to the television or holding books very near
• Frequent eye rubbing or squinting
• Complaints of headaches after schoolwork

Symptoms in older adults

• Need for brighter light when reading
• Trouble distinguishing colors or seeing contrast
• More sensitivity to glare from headlights or sunlight
• Frequent changes in eyeglass prescription

Causes

Main causes

• Eye problems can be caused by aging, such as cataracts or age-related macular degeneration.
• Health conditions like diabetes or high blood pressure can damage the blood vessels in the eye.
• Refractive errors like nearsightedness or farsightedness are usually inherited.

Risk factors

• Being over 60 years old
• Having a family history of eye disease like glaucoma or macular degeneration
• Smoking or heavy alcohol use
• Having diabetes, high blood pressure, or a history of eye injury or surgery

When to see a doctor

See a doctor urgently if:

• If you have sudden vision loss or flashes of light, call your local emergency number immediately.
• If you experience sudden double vision, severe eye pain, or an eye injury, see a doctor the same day.

Book a routine appointment if:

• Adults aged 40-60 should have an eye screening every 2-4 years.
• If you are over 60 or have diabetes, you may need screening every year.
• Children should have their first eye screening before starting school, then as recommended by their doctor.

Diagnosis

An eye screening test is performed by an optometrist or ophthalmologist to check your vision and the health of your eyes.

Tests that may be done

• Visual acuity test – reading letters on a chart to measure how sharp your vision is.
• Tonometry – a puff of air or a gentle touch to measure the pressure inside your eye, which can help detect glaucoma.
• Dilated eye exam – eye drops widen your pupils so the doctor can look at the back of your eye for signs of disease.

What to expect at your appointment

The test is painless and usually takes about 15 to 30 minutes. You may be asked to look at an eye chart, and the doctor may use a bright light to examine your eyes. If you receive dilation drops, your vision may be blurry and you will be sensitive to light for a few hours, so it is a good idea to bring sunglasses and arrange for someone to drive you home.

Treatment

Treatment depends on what the eye screening finds. Many conditions can be corrected with eyeglasses or contact lenses. Others may need medicine or surgery.

Self-care at home

• Give your eyes regular breaks from screens – use the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds.
• Wear sunglasses that block UV rays to protect your eyes outdoors.
• Keep your eyeglass or contact lens prescription up to date and avoid using damaged lenses.

Medical treatments

If an eye condition is found, treatment may include prescription eyeglasses or contact lenses, medicated eye drops to lower eye pressure or treat infections, oral medications for certain conditions like inflammation, or laser treatments to repair damaged blood vessels or correct vision problems. Your doctor will discuss the safest options for you.

When is surgery considered?

Surgery may be recommended for cataracts (when the lens becomes cloudy), some cases of glaucoma, or to repair a detached retina. The type of surgery depends on the condition and your overall health.

Living with this condition

If you have an eye condition, follow your eye doctor's advice about using prescribed glasses, drops, or other treatments. Keep a routine for taking medications and attending follow-up appointments.

Lifestyle tips

• Avoid smoking, as it increases your risk of many eye diseases.
• Wear protective eyewear when playing sports or doing DIY work.
• Manage other health conditions like diabetes and high blood pressure through diet, exercise, and medication as prescribed.

Diet and exercise

A diet rich in leafy greens, colorful fruits and vegetables, and fish containing omega-3 fatty acids may help support eye health. Regular exercise also improves blood flow to the eyes and helps control conditions like diabetes.

Mental health and emotional wellbeing

Vision changes can be worrying and may affect your mood or independence. It is normal to feel frustrated or anxious. Talk to your doctor or a counsellor if you need support. Remember that many eye conditions can be managed, and there are tools and services to help you live well.

Prevention

Many eye problems cannot be completely prevented, but regular eye screening can catch them early, when treatment works best. A healthy lifestyle and protecting your eyes from injury and strong sunlight also help reduce your risk.

Screening programmes

Regular eye screening is the best way to find problems early. How often you need it depends on your age, health, and family history. Your doctor can advise you on a schedule that fits your needs.

Complications

If left untreated

• Permanent vision loss or blindness from conditions like glaucoma, diabetic retinopathy, or advanced cataracts.
• Increased difficulty with daily activities such as reading, driving, or recognizing faces.
• Higher risk of falls and accidents due to poor vision.

Long-term outlook

With regular screening and timely treatment, most people can maintain good vision well into old age. If a condition is found, there are many effective treatments available to slow down or stop vision loss. Even if some vision is lost, support services can help you adapt and continue to live independently.

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