LASIK surgery uses laser technology to reshape the cornea and correct refractive errors such as short-sightedness and astigmatism.
LASIK Surgery: What You Need to Know Before Deciding
According to data cited by the U.S. Food and Drug Administration (FDA) and professional ophthalmology bodies, more than 20 million people worldwide have undergone LASIK surgery since the procedure was introduced in the 1990s. Hundreds of thousands of LASIK procedures continue to be performed each year globally, making it one of the most commonly performed elective eye surgeries. While LASIK has a strong track record of success, it is still a permanent surgical procedure and requires careful consideration.
What Is LASIK Surgery?
LASIK surgery permanently reshapes the cornea to improve how light is focused onto the retina.
Laser-assisted in situ keratomileusis (LASIK) is a type of refractive eye surgery designed to correct vision problems related to how the eye focuses light. These refractive errors include:
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Myopia (short-sightedness)
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Hyperopia (long-sightedness)
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Astigmatism
LASIK works by permanently reshaping the cornea, the clear, dome-shaped surface at the front of the eye. By changing the cornea’s curvature, light entering the eye can be focused more accurately onto the retina, resulting in clearer vision.
Before the procedure begins, anaesthetic eye drops are applied to numb the eye. During surgery, a specialised laser creates a thin flap in the cornea. This flap is gently lifted, and another laser reshapes the underlying corneal tissue according to the patient’s prescription. The flap is then repositioned, where it naturally adheres without stitches.
The procedure usually takes less than 30 minutes for both eyes, and most patients return home the same day.
LASIK Surgery for Presbyopia
Presbyopia is an age-related condition that typically begins in the early to mid-40s. It affects the eye’s ability to focus on near objects, making tasks such as reading small print or using a mobile phone more difficult. Presbyopia occurs due to natural stiffening of the eye’s lens and is not a disease.
Standard LASIK surgery cannot correct or prevent presbyopia, as the condition is related to lens flexibility rather than corneal shape. However, some individuals may be candidates for monovision LASIK.
In monovision LASIK:
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One eye is corrected for distance vision
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The other eye is corrected for near vision
This approach can reduce dependence on reading glasses, but not everyone adapts well to monovision. Some people may experience reduced depth perception or visual discomfort. A trial with contact lenses is often recommended before committing to permanent surgical correction. Consultation with an ophthalmologist is essential before considering LASIK for presbyopia.
Benefits of LASIK Surgery
For suitable candidates, LASIK offers several potential benefits:
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Rapid visual recovery, often within 24 hours
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Reduced dependence on glasses or contact lenses
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Long-lasting vision correction
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High satisfaction rates when patients are carefully selected
Many people are able to resume normal daily activities within a few days, although vision may continue to stabilise over several weeks.
Possible Side Effects and Risks
Although LASIK is generally safe, it is still surgery and carries potential risks and side effects. These may include:
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Infection or inflammation
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Problems related to the corneal flap
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Blurred or hazy vision
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Glare, halos, or difficulty driving at night
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Increased light sensitivity
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Dry eyes
For most patients, these effects are temporary and improve over time. However, a small minority may experience long-term or permanent symptoms. This is why thorough pre-surgical assessment and informed decision-making are crucial.
Important Considerations Before LASIK
Before proceeding with LASIK surgery, patients should be aware of several key points:
LASIK is irreversible
The cornea is permanently reshaped. If complications occur or vision changes over time, the original corneal structure cannot be restored.
Perfect vision is not guaranteed
According to the American Academy of Ophthalmology, about 9 out of 10 patients achieve vision between 20/20 and 20/40 after LASIK. While this represents a significant improvement for most people, 20/40 vision may not meet visual requirements for certain occupations or activities.
Enhancement procedures may be needed
Some patients require a follow-up procedure known as LASIK enhancement if the initial correction is insufficient or if vision changes significantly over time.
Dry eye symptoms may persist
LASIK can temporarily or permanently reduce tear production. Some patients may require long-term use of artificial tears or other treatments if symptoms do not resolve.
Who Is a Suitable Candidate?
Not everyone is suitable for LASIK surgery. Ideal candidates generally:
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Are over 18 years old
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Have a stable vision prescription
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Have sufficient corneal thickness
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Do not have certain eye diseases or severe dry eye
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Are not pregnant or breastfeeding
A comprehensive eye examination is necessary to determine suitability and minimise risk.
Final Thoughts
LASIK surgery has helped millions of people reduce their dependence on glasses or contact lenses and improve their quality of life. However, it is not a one-size-fits-all solution. Understanding the benefits, limitations, and risks is essential before making a decision.
A detailed consultation with a qualified ophthalmologist allows for personalised assessment and ensures that expectations are realistic. When approached thoughtfully, LASIK can be a safe and effective option for suitable individuals — but careful consideration remains key. PRIME
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