The surgery journey: Questions and Answers
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From the first consultation to the last follow-up: what is measured and why, how to prepare, what happens on the day, and what a normal first week and first month actually look like.
Quick answer
From the first consultation to the last follow-up: what is measured and why, how to prepare, what happens on the day, and what a normal first week and first month actually look like.
General educational information. It does not replace an examination, and it cannot tell you what is happening in your own eyes.
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- Surgery journey
The most useful thing a patient can do before surgery is understand the sequence, because it turns a set of instructions into something you can follow knowingly and question properly.
Individual recovery varies, and your surgeon's instructions take priority over anything general written here. Where an answer touches on what to do or not do, it says so.
The surgery journey questions and answers
Surgery journey
From the first consultation to the last follow-up: what is measured and why, how to prepare, what happens on the day, and what a normal first week and first month actually look like.
Before surgery 3
Deciding, planning and preparing.
What happens during a vision correction consultation? Answer
A vision correction consultation combines a refraction with a full eye examination and imaging of the cornea, and it ends with a discussion of whether surgery is appropriate and which technique fits your measurements.
The examination part is not a formality. It is where conditions that change the recommendation are found, and where an eye that should not be operated on is identified.
You should leave knowing three things: what your measurements are, what was recommended, and what the reasons were. If any of those is missing, asking for them is reasonable.
Sources The Royal College of Ophthalmologists (UK)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What should I bring to an eye consultation? Answer
Bring your current glasses or the prescription for them, any contact lens details including the type and how long you wear them, a list of your medications, and any previous eye records or scans.
Previous records are more valuable than they sound. Corneal measurements taken a year ago let a clinician see whether anything is changing, which is information that cannot be recreated on the day.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Should I get a second opinion before eye surgery? Answer
A second opinion is reasonable whenever you are unsure, when two clinics recommend different procedures, or when a recommendation does not seem to follow from your measurements. It is not an insult to the first surgeon.
The most useful thing to take to a second opinion is the measurements from the first, not just the recommendation. Comparing measurements is more informative than comparing opinions.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Eligibility & assessment 3
What a clinician checks, and why no page can decide it for you.
How stable does my prescription need to be before surgery? Answer
Clinics generally look for a prescription that has been stable for a period rather than for a specific number, because operating on a moving prescription risks treating an eye that will not match the plan a year later.
How that stability is demonstrated varies: some clinics rely on your history of prescriptions, others ask you to be rechecked after an interval. If your prescription changed at your last two tests, say so at the consultation.
Sources The Royal College of Ophthalmologists (UK)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Why is a full eye examination needed, not just a refraction? Answer
A refraction only establishes what prescription corrects your vision. It says nothing about corneal thickness, corneal shape, tear film or the health of the retina, and those are the findings that decide whether surgery is safe and which technique is appropriate.
A refraction can also be normal in an eye with a condition that has not yet affected central vision. That is the case for early glaucoma, for some retinal problems, and for mild keratoconus.
Sources The Royal College of Ophthalmologists (UK) , American Academy of Ophthalmology
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Can a website tell me whether I am eligible for laser eye surgery? Answer
No. Eligibility depends on measurements that only an examination can produce, including corneal thickness and shape, tear film and the state of the retina. Any tool that claims otherwise is describing general patterns rather than your eyes.
What a knowledge base can do is tell you which factors are assessed and which questions to ask, so that the consultation is a conversation rather than a verdict you have to accept.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Eye tests & scans 8
Topography, tomography, pachymetry, OCT, dilation and what each one shows.
What happens during a comprehensive eye examination? Answer
A comprehensive eye examination covers vision and refraction, eye pressure, the external eye and eyelids, the cornea, and the retina and optic nerve, usually with dilating drops so the back of the eye can be seen properly.
It differs from an eye test for glasses in what it is looking for. A refraction asks what correction you need; a full examination asks whether anything about the eye is not healthy.
Sources American Academy of Ophthalmology , National Eye Institute, National Institutes of Health (US)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What is corneal topography? Answer
Corneal topography maps the surface shape of the cornea, producing a colour-coded elevation and curvature map that shows how regular the surface is and where the steep and flat areas lie.
It is the test that most often changes the recommendation, because it can reveal an irregular or suspicious pattern that a refraction alone would never show.
Sources The Royal College of Ophthalmologists (UK) , American Academy of Ophthalmology
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What is corneal tomography? Answer
Corneal tomography measures the shape of the cornea in three dimensions, including the thickness profile across it, rather than describing the front surface alone.
The distinction matters because some corneal conditions are visible mainly in how the thickness changes from the centre outwards. Tomography shows that relationship; topography on its own does not.
Sources The Royal College of Ophthalmologists (UK)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What is pachymetry? Answer
Pachymetry is the measurement of corneal thickness. It is one of the central measurements in refractive planning, because it determines how much tissue is available to be removed.
The number that matters clinically is the predicted thickness that would remain after treatment, not the starting measurement on its own.
Sources The Royal College of Ophthalmologists (UK) , StatPearls, NCBI Bookshelf
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Why does the doctor dilate my eyes? Answer
Dilating drops widen the pupil so the retina and optic nerve at the back of the eye can be examined properly. Without dilation a large part of the retina simply cannot be seen.
The drops blur your near vision and increase light sensitivity for several hours, which is why driving yourself home afterwards is a bad idea.
Sources American Academy of Ophthalmology
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What is an eye pressure test? Answer
An eye pressure test measures the fluid pressure inside the eye, which is one of the main risk factors for glaucoma. It is quick and is done with a small instrument that touches the front of the eye after numbing drops.
Sources National Eye Institute, National Institutes of Health (US) , American Academy of Ophthalmology
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What is a retinal scan or photograph? Answer
A retinal photograph records the appearance of the retina, and it is used as a baseline so that any future change can be compared against something. An OCT scan goes further and images the retinal layers in cross-section.
Sources American Academy of Ophthalmology , National Eye Institute, National Institutes of Health (US)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
How long does a comprehensive eye examination take? Answer
A full examination with dilation usually takes substantially longer than a routine sight test, partly because some measurements need repeat readings and partly because the drops need time to work.
Ask the clinic when you book, and plan the rest of your day around not being able to drive. That is the practical part of the answer.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Preparation 9
Lenses, medication, food, makeup and travel arrangements.
How long should I stop wearing contact lenses before an eye examination? Answer
Soft lenses are usually stopped for a few days before an assessment and rigid lenses for considerably longer, because contact lens wear changes the shape of the cornea and can make the measurements wrong.
The exact period depends on the lens type and on how long you have worn them. Tell the clinic what you wear when you book, rather than arriving and mentioning it, since a measurement taken too soon may need repeating.
Sources The Royal College of Ophthalmologists (UK) , American Academy of Ophthalmology
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
How should I prepare for laser eye surgery? Answer
Preparation is mostly about stopping contact lenses for the period you were given, arranging not to drive home, following any instructions about makeup, perfume and medication, and having someone available afterwards.
Clinics differ on details such as whether eye makeup should be avoided for a day beforehand. Follow your own clinic’s instructions rather than a general list, and get them in writing.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Can I eat before laser eye surgery? Answer
Eating normally is usually fine before laser vision correction, because sedation is rarely used. If your clinic plans to use sedation, it will give you fasting instructions, and those take priority.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Can I drink coffee before laser eye surgery? Answer
Tea and coffee are not usually restricted before laser eye surgery. If you are taking anything to help you relax, or if your clinic has advised otherwise, follow the clinic.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Can I wear makeup before laser eye surgery? Answer
Eye makeup is usually avoided immediately before surgery to reduce the chance of debris or bacteria reaching the treated surface. The period is a clinic instruction rather than a universal rule.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Why are perfume and aftershave restricted before eye surgery? Answer
Perfume and similar products are restricted because airborne particles from them can affect the laser’s environment and, in some facilities, the treatment room’s air quality requirements.
It is a theatre requirement rather than a medical risk to you, which is why the rule can seem arbitrary and is still enforced.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Can I drive myself home after eye surgery? Answer
No. Vision is typically blurred and light sensitivity is common immediately after treatment, so you need someone to take you home. The same applies after a consultation where your pupils were dilated.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Should someone come with me on the day? Answer
It is worth having someone with you for the journey home and for the first evening, when vision can be blurry and the eye may be uncomfortable. It also means details of the aftercare instructions are heard by two people.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What medications should I tell my eye doctor about? Answer
Tell the clinic about all of them, including anything bought over the counter and any supplements, with particular attention to blood thinners, acne medication such as isotretinoin, and medication for diabetes or autoimmune conditions.
Some medications affect the tear film, some affect healing, and some affect the measurements themselves. The clinic can only account for what it knows about.
Sources The Royal College of Ophthalmologists (UK)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Surgery day 2
What happens in the treatment room and immediately afterwards.
What happens on the day of laser eye surgery? Answer
The day usually follows a sequence: a final check and confirmation of consent, numbing drops, the procedure itself with the eye held steady and you awake, a short period of observation, and then going home with written aftercare instructions.
Both eyes are commonly treated in the same session, which is a question worth confirming in advance if you have a strong preference either way.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
What does laser eye surgery feel like? Answer
It is usually described as pressure or a sensation of something touching the eye rather than pain, because the eye is numb. Afterwards, grittiness, watering and light sensitivity are common for some hours.
People describe the experience quite differently from one another. What matters is that your clinic tells you what to expect and what to do if it is worse than that.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Recovery & aftercare 5
The first week, the first month, and what is expected rather than alarming.
What should I expect in the first days after laser eye surgery? Answer
Expect vision that is improved but fluctuating, some dryness or grittiness, light sensitivity, and halos around lights at night. Drops are typically used on a schedule for a period afterwards.
Fluctuation is the part people are least prepared for: better in the morning, softer in the evening, or changing with how dry the eye feels. That is common and not a sign of failure.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Is blurry vision normal after laser eye surgery? Answer
Some blur is expected early and can come and go for weeks. Blur that is getting progressively worse, that is accompanied by pain, or that appears suddenly later on is not something to wait out.
A useful distinction is whether it varies with dryness and blinking. Fluctuating blur that settles after drops or a few blinks points towards the tear film, which is a different conversation from constant blur.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Is light sensitivity normal after eye surgery? Answer
Light sensitivity is common in the first days and usually settles. Sunglasses help in the meantime, and the clinic will say how long it expects this to last.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
Are halos normal after surgery, and how long do they last? Answer
Halos and glare are commonly reported early after laser surgery and often reduce over the following weeks and months as the surface settles. Persisting or worsening night vision symptoms should be assessed rather than assumed to be normal.
Sources Peer-reviewed literature (via PubMed Central)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
How long does dry eye last after surgery? Answer
Postoperative dryness usually improves over months as the surface nerves recover, although the time varies between individuals and a pre-existing tendency can make it persist longer.
What shortens it in practice is treating it from the start rather than waiting: lubricants on the schedule you were given, and telling the clinic if it is not settling.
Sources Peer-reviewed literature (via PubMed Central) , Peer-reviewed literature (via PubMed Central)
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
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These answers describe what is generally true. They are not a diagnosis and they cannot say whether a treatment is suitable for you, because suitability depends on measurements taken during an examination. Only a qualified ophthalmologist who has examined you can decide.
Sources & further reading
We prefer primary sources. Where a claim comes from a manufacturer, a single study or a regulator, it is labelled as such below.
- The Royal College of Ophthalmologists
The UK professional body for ophthalmologists, which publishes standards and commissioning guidance for refractive surgery services.
Used for What good preoperative assessment and consent look like.
Link checked 22 September 2026
- EyeSmart: eye health information for the public
Patient-facing material from the largest ophthalmology professional body, covering conditions, tests and treatments outside refractive surgery.
Used for Cross-checking patient-facing explanations of non-refractive eye conditions; Describing what tests such as dilation and OCT involve.
Link checked 23 September 2026
- Eye Health Information
Condition-by-condition eye health information from a US government research institute, written for patients rather than for clinicians.
Used for Plain-language explanations of eye conditions and their symptoms; Healthy vision and screening guidance.
Link checked 23 September 2026
- Laser In Situ Keratomileusis (LASIK)
The equivalent clinical reference chapter for LASIK, used so that comparisons describe both procedures symmetrically.
Used for How LASIK creates and manages a corneal flap; LASIK complication categories.
Link checked 22 September 2026
- Post-LASIK dry eye disease: A comprehensive review of the current literature
A review of dry eye after LASIK, including the mechanisms involved and how other procedures compare in the published literature.
Used for Balanced comparison of dry-eye risk between procedures.
Link checked 22 September 2026
- Dry Eyes After SMILE
A review of ocular surface changes after SMILE, including how dry-eye signs and symptoms are measured and how they change over the first postoperative months.
Used for Explaining why dry eye is a key preoperative consideration.
Link checked 22 September 2026