Likely cause
Before laser vision correction (LASIK, SMILE or PRK), your ophthalmologist will perform a detailed eye examination to check if the procedure is safe for you. This usually includes:
• Refraction test – to measure your spectacle power.
• Corneal Topography/Tomography (Pentacam) – to assess the shape of the cornea and rule out keratoconus.
• Corneal Pachymetry – to measure corneal thickness.
• Tear film/Dry eye assessment – to detect dry eyes that may affect healing.
• Slit-lamp examination – to examine the front of the eye.
• Intraocular Pressure (IOP) measurement – to screen for glaucoma.
• Dilated retinal examination – to check the retina, especially in people with high spectacle power.
If you have diabetes, thyroid disease or other medical conditions, additional Tests may be required.
What to watch for
Inform your ophthalmologist if:
• Your spectacle power has changed in the past 6–12 months.
• You wear contact lenses.
• You have dry eyes.
• You have diabetes, thyroid disease or an autoimmune disorder.
• You have had previous eye surgery or injury.
• You are pregnant or breastfeeding.
These conditions may affect whether laser surgery is suitable or when it should be performed.
What you can do
Laser eye surgery is recommended only after reviewing all the test results together. Depending on your eye examination, your doctor may advise LASIK, SMILE, PRK, another vision correction procedure, or continuing with glasses or contact lenses if surgery is not suitable.
When to see a doctor
Consult a qualified ophthalmologist or refractive surgeon for a complete pre-operative evaluation before planning laser vision correction. Seek immediate medical attention if you develop sudden vision loss, severe eye pain, flashes of light, a curtain-like shadow in your vision, or marked redness of the eye.
This is general information from a verified doctor and is not a diagnosis or a substitute for an in-person consultation. In an emergency, seek immediate medical care.
