Draft content, pending review: this article is written to established clinical-education standards but has not yet been read and approved by Dr. Niranjana Bejan Singh. It is not yet considered published or a substitute for professional medical advice.
LASIK (Laser-Assisted In Situ Keratomileusis) is a widely used surgery that reshapes the cornea, the clear front surface of the eye, to correct short-sightedness (myopia), long-sightedness (hyperopia), and astigmatism. For many people it reduces or removes the need for glasses or contact lenses. It is not the right choice for everyone, and deciding whether to go ahead starts with a detailed eye examination, not a walk-in booking. This post explains, in plain terms, what LASIK involves, who tends to be a good candidate, and what the day of surgery and recovery are usually like.
What LASIK actually does
During LASIK, the surgeon creates a thin, hinged flap in the outer layer of the cornea, folds it back, and uses an excimer laser to reshape the corneal tissue underneath. This changes how light bends (refracts) as it enters the eye, which is what corrects the focusing error. The flap is then laid back in place, where it heals naturally over time without stitches.
LASIK treats refractive errors — it does not treat other eye conditions such as cataracts, glaucoma, or retinal disease, and it does not prevent age-related changes like presbyopia (the gradual loss of close-up focusing power that affects almost everyone after their mid-40s).
Who is usually a good candidate
Good candidates are generally over 18 (often older, since vision can still be changing in the late teens and early twenties), have had a stable glasses or contact lens prescription for at least a year, and are in general good eye health.
A comprehensive pre-LASIK evaluation checks corneal thickness and shape, pupil size, tear film quality, and overall eye health, since these determine both safety and expected results.
LASIK is usually not recommended for people with certain corneal conditions such as keratoconus (progressive thinning of the cornea), very thin corneas, significant dry eye disease, uncontrolled diabetes, some autoimmune conditions, or during pregnancy and breastfeeding, since hormonal changes can temporarily alter vision. Your surgeon will review your full medical and eye history before advising you either way.
What to expect on the day and right after
The procedure itself is typically quick, done under numbing eye drops, and most people are awake and comfortable throughout. Many people notice a meaningful improvement in vision within a day, though full stabilisation can take longer.
It is normal to have some grittiness, light sensitivity, watering, or mild discomfort for the first day or so. You will usually need someone to drive you home, and you will be given antibiotic and lubricating eye drops to use for a period of weeks as the eye heals.
You will need follow-up visits so your surgeon can check the flap is healing well and your vision is progressing as expected — these visits matter even if your eyes feel fine.
Risks and realistic expectations
As with any surgery, LASIK carries some risk. The most common temporary effects are dry eye and night-time glare, halos, or starbursts around lights, which usually settle over weeks to months but can persist longer in some people.
Less commonly, vision may end up slightly under- or over-corrected, sometimes needing glasses for certain tasks or a further "enhancement" procedure later. Rare but more serious complications include infection or flap-related problems, which is why choosing an experienced surgical team and attending every follow-up appointment matters.
LASIK does not guarantee perfect, glasses-free vision for life — it corrects your current prescription, but eyes can still change with age, particularly the near-vision changes of presbyopia in your 40s and beyond.
When to seek care
A pre-LASIK evaluation is a routine, scheduled visit, not an emergency one. After surgery, mild grittiness, watering, and light sensitivity for a day or two are expected. However, you should contact your eye surgeon promptly (the same day, not wait-and-see) if you develop significant or worsening eye pain, a sudden decrease in vision, increasing redness, unusual discharge, or if you experience any trauma or heavy rubbing of the eye during the early healing period — these can signal a flap problem or infection that needs urgent assessment.
Frequently asked questions
Does LASIK hurt?
The eye is numbed with anaesthetic drops beforehand, so the procedure itself is not usually painful, though you may feel some pressure. Mild discomfort, grittiness, or watering for the first day afterward is common.
How long is recovery?
Most people notice improved vision within a day and return to normal daily activities within a few days, but the eye continues to heal and settle for several weeks to months, so strenuous activity, swimming, and eye makeup are usually restricted for a period after surgery.
Will I never need glasses again?
LASIK corrects your current prescription, but it cannot prevent future age-related changes such as presbyopia, which affects near vision from the mid-40s onward. Some people eventually need reading glasses even after a successful LASIK outcome.
Am I automatically a candidate if I just want the surgery?
No — candidacy depends on a detailed evaluation of your cornea, prescription stability, tear film, and overall eye health. Some people are advised against LASIK and may be offered alternative options instead.
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Call the appointment desk, or book online — we will confirm your time by phone.
Sources consulted: AAO — LASIK: Laser Eye Surgery, Mayo Clinic — LASIK Surgery, NHS — Laser Eye Surgery (LASIK) . General medical information — not a substitute for professional diagnosis. Pending final medical review by Dr. Niranjana Bejan Singh before publish.
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