Laser Eye Surgery And Lens Surgery

Overview

Laser eye surgery and lens surgery are operations that change the shape or the contents of your eye to help you see more clearly without glasses or contact lenses. Laser eye surgery uses a very precise beam of light to gently reshape the clear front window of your eye (the cornea). Lens surgery removes your eye's natural lens and puts a small artificial lens in its place. Lens surgery is most often done because the natural lens has become cloudy (this cloudiness is called a cataract). It is also sometimes done purely to correct eyesight, and this is called clear lens exchange.

Yes. Laser eye surgery and cataract lens surgery are among the most commonly performed operations in the world, with millions of people having them each year. Cataract surgery is one of the most frequent operations done in countries like the UK.

Laser eye surgery is mostly for adults over about 18 to 21 whose glasses prescription has been steady for at least a year. Lens surgery for cataracts is most common after age 60, though it can happen much earlier. Clear lens exchange is usually chosen by adults with high prescriptions or by people in their 40s and 50s who want to be less dependent on glasses.

Symptoms

Common symptoms

• Finding it hard to see things far away, such as road signs or the television, without glasses
• Finding it hard to see close up, such as reading or looking at a phone, especially after age 40
• Blurred or smeary vision that glasses or contact lenses correct well
• Disliking the look of glasses, or finding contact lenses uncomfortable, drying or awkward for work and sport
• Cloudy, dim or yellowed vision, glare from lights and poor night vision (these are typical signs of a cataract)

Symptoms in children

• Laser eye surgery is not usually offered to anyone under 18, because the eye and prescription are still changing.
• Children can develop cataracts, sometimes from birth. This needs specialist care quickly to protect sight development.
• If a child seems to have poor vision, a squint, or holds things very close, arrange an eye test rather than considering surgery.

Symptoms in older adults

• Cataracts becoming more noticeable over months or years, with colours looking faded and lights seeming too bright or glaring
• Needing a new glasses prescription more often
• Dry, gritty or watery eyes, which are common with age and can affect suitability for surgery
• Other eye conditions such as glaucoma or macular problems, which need checking before any surgery
• Falls or difficulty with driving, reading or recognising faces because of poor vision

Causes

Main causes

• Short-sightedness (myopia), where distant objects look blurred because the eye is slightly too long or the cornea too curved
• Long-sightedness (hyperopia), where close objects are blurred and the eye has to work hard to focus
• Astigmatism, where the cornea is shaped more like a rugby ball than a football, so vision is distorted at all distances
• Ageing of the natural lens, which becomes stiff (making reading harder after 40) and later cloudy (a cataract)
• A strong wish to be free of glasses or contact lenses for work, sport or personal reasons

Risk factors

• A prescription that is still changing, which makes results less predictable
• Thin or unusually shaped corneas, including a condition called keratoconus
• Dry eye, which is common and can slow healing
• Autoimmune or connective tissue conditions, and diabetes that is not well controlled
• Being pregnant or breastfeeding, when the eyes can change shape temporarily
• Regular exposure to dust, grit or sports injuries, or a job with high risk of eye knocks
• Smoking, poor diet and long-term sun exposure without eye protection, which raise cataract risk

When to see a doctor

See a doctor urgently if:

• Any sudden change in your vision, in either eye, whether or not you have had surgery
• Severe eye pain, a red painful eye, or pain with light sensitivity
• Flashes, a sudden shower of floaters, or a shadow across your vision
• After surgery: worsening vision, increasing redness or discharge, or pain that is getting worse rather than better

Book a routine appointment if:

• You are thinking about laser or lens surgery and want to know whether you are suitable
• Your glasses prescription has been stable for a year and you are considering your options
• Your vision is becoming cloudy or dim and daily tasks are getting harder
• You are due a routine eye test, usually every two years, or sooner if your optician advises

Diagnosis

There is no single test that says yes or no. Instead, a specialist eye team builds a full picture of your eyes and what you need. They measure your prescription, map the shape and thickness of your cornea, check the health of the back of your eye, and ask about your general health, your work and what you want from surgery. This usually takes an hour or two and is not painful.

Tests that may be done

• A refraction test, where you look through lenses and say which makes letters clearer, to measure your prescription
• A corneal topographer or scanner, which maps the shape and thickness of the front of your eye
• Eye pressure measurement, using a quick puff of air or a tiny probe after numbing drops
• Dilated eye exam, where drops widen your pupil so the back of the eye and retina can be checked
• A scan of the inside of the eye (such as an optical coherence scan) if your surgeon wants a closer look
• Dry eye tests, tear film checks and a measurement of how well your tears protect the eye
• For lens surgery, an ultrasound or light scan to work out the right strength of artificial lens for your eye
• A review of your general health, medicines and any allergies

What to expect at your appointment

Expect a lot of sitting at machines and resting your chin on supports while you look at a target. Drops may blur your vision and make bright light uncomfortable for a few hours, so it helps to have someone with you or to avoid driving afterwards. You should leave with a clear explanation of your options, the risks, the costs and the likely recovery, plus time to ask questions.

Treatment

There are two broad routes. One is to keep correcting your vision with glasses or contact lenses. The other is surgery: laser eye surgery reshapes the cornea, while lens surgery replaces the natural lens with an artificial one. Neither route is 'better' in general. The right choice depends on your prescription, your eye health, your age, your budget and what you want your eyes to do for you.

Self-care at home

• Have a full eye test before making any decision, and be honest about how much your vision bothers you day to day
• If you wear contact lenses, you will usually be asked to leave them out for a period before measurements — ask how long for your lens type
• Write down your questions and take someone with you to appointments
• Arrange time off and a lift home for the day of surgery; you will not be able to drive straight after
• Follow your surgical team's aftercare instructions closely, including any eye drops, shields and appointment times
• Avoid rubbing your eyes, and keep soapy water, swimming pools, hot tubs and eye make-up away until you are told it is safe
• Use sunglasses outdoors in the early weeks if light feels bright, and take breaks from screens
• Keep the eye protection shield on at night if you are given one

Medical treatments

There is no medicine that reshapes the eye or clears a cataract, so drops and tablets cannot replace surgery. Treatments that are used alongside surgery, or instead of it, include: correctly updated glasses or contact lenses; treatment for dry eye, such as lubricating drops, warm compresses and lid cleaning; and management of other eye or health conditions that affect healing. Your eye care team will discuss what is relevant for you and prescribe only what you need. Always check with your pharmacist or eye clinic before using any new drops, including over-the-counter ones.

When is surgery considered?

Laser eye surgery is usually considered when your prescription has been stable for at least a year, your corneas are thick enough and healthy, you are an adult, and you understand the risks and the possibility that you may still need glasses sometimes. Lens surgery is considered when a cataract is affecting your daily life, such as reading, driving, watching television or recognising faces. Clear lens exchange is considered only after a careful discussion, because it is a bigger operation than laser surgery and carries different risks.

Living with this condition

Most people notice clearer vision within a day or two of laser surgery or lens surgery, though it can wobble for the first few weeks. Small fluctuations, mild grittiness and glare are common early on. Plan for a few days of taking it easy, then a gradual return to normal routines. Most people are back at work within a few days to a couple of weeks, depending on the job and the operation. Your surgeon will tell you when you can drive, swim and play sport.

Lifestyle tips

• Keep up regular eye tests after surgery, usually every two years, even if your vision feels perfect
• Wear sunglasses with good ultraviolet protection on bright days
• Take regular breaks from screens using the 20-20-20 habit: every 20 minutes, look at something 20 feet away for 20 seconds
• Use lubricating drops if your eyes feel dry, especially in heated rooms or on windy days
• Wear safety glasses for DIY, gardening and sport
• If you smoke, stopping is one of the best things you can do for your eyes and your general health

Diet and exercise

A balanced diet with plenty of vegetables and fruit supports eye health, and oily fish is often recommended for general eye comfort. Regular activity helps blood pressure, blood sugar and circulation, all of which matter for your eyes. Ask your surgeon when you can return to exercise; gentle walking is usually fine quickly, but swimming pools and heavy lifting need a short pause. If you have diabetes, keeping your blood sugar steady helps healing and long-term eye health.

Mental health and emotional wellbeing

Eyesight is closely tied to independence and confidence, so it is normal to feel anxious before surgery or while adjusting to new vision. Some people feel a short low patch if the result is not quite what they hoped, or if they still need glasses for some tasks. Tell your eye team if you feel worried or low — they can explain what is normal, what may still settle, and what can be adjusted. If low mood or anxiety lasts more than a couple of weeks, speak to your doctor. If you ever have thoughts of harming yourself, contact your local emergency number or a crisis line straight away and tell someone you trust.

Prevention

You cannot prevent short-sightedness, long-sightedness or astigmatism, and you cannot prevent the natural lens from ageing. What you can do is protect your eyes day to day and keep up regular checks so problems are caught early. Not smoking, protecting your eyes from strong sun and from injury, and keeping conditions like diabetes well controlled all lower the risk of eye problems over time.

Vaccines

There is no vaccine for eye conditions that need laser or lens surgery. Keep other vaccinations up to date as advised by your doctor, since some infections can affect the eye.

Screening programmes

Routine eye tests are the main screening tool. Most adults are advised to have one every two years, and more often if you have diabetes, glaucoma in the family, or a strong glasses prescription. Eye tests can pick up cataracts, glaucoma and retinal problems before you notice much yourself. If you have diabetes, attend your regular diabetic eye screening when invited.

Complications

If left untreated

• Living with blurred vision, which can affect driving, work, reading and confidence
• Cataracts slowly getting cloudier, so vision becomes dimmer and daily tasks harder
• Higher risk of falls and injuries in older adults with poor vision
• Some eye conditions, such as glaucoma, causing damage that cannot be reversed if found late

Long-term outlook

The great majority of people who have laser or lens surgery are pleased with the result and enjoy much clearer vision. Vision can take weeks to settle, and most people need less of a glasses prescription afterwards, though some still use glasses for certain tasks. Serious problems are uncommon and can usually be treated. If your result is not what you hoped for, your eye team can often fine-tune it, and there are options. Keep talking to your team, keep your follow-up appointments, and ask for more time if you are unsure before going ahead.

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