What Is LASIK Eye Surgery and How Does It Work?
Dr. Nikhil Nasta
3 min read
Quick Answer
LASIK is a laser vision correction procedure that reshapes the cornea so light focuses correctly on the retina. It is used to reduce or remove dependence on glasses for myopia, hyperopia, and astigmatism. The procedure is fast, usually painless with numbing drops, and most patients notice clearer vision within 24 hours.
How Vision Becomes Blurry in the First Place
In refractive error, the eye either focuses light in front of the retina (myopia), behind the retina (hyperopia), or unevenly (astigmatism). LASIK does not change the retina or optic nerve. Instead, it changes corneal curvature with micron-level precision so the image falls sharply on the retina.
Step-by-Step LASIK Procedure
- Pre-operative mapping: corneal topography, pachymetry, wavefront analysis, dry-eye tests, and pupil measurements
- Numbing drops are instilled; no injection is required
- A femtosecond laser creates a very thin corneal flap
- An excimer laser reshapes the cornea based on your eye power and treatment plan
- The flap is repositioned and naturally adheres without stitches
- Protective instructions and drop schedule are explained before discharge
How Long Does It Take?
Laser time is usually seconds per eye. Including preparation, both eyes are typically completed in under 20 minutes. Most patients rest briefly and go home the same day.
Who Is Usually Eligible for LASIK
- Stable eye number for at least 12 months
- Healthy corneal thickness and topography
- No active corneal disease or uncontrolled dry eye
- No untreated retinal pathology
- Realistic expectations about results and near-vision changes with age
What Results Can You Expect?
Most suitable candidates achieve excellent unaided distance vision. Many reach 20/20 or close, but final clarity depends on baseline power, corneal profile, tear film quality, and healing response. The goal is safe, stable, functional independence from glasses for day-to-day life.
Safety and Precision in Modern LASIK
Current LASIK platforms combine eye-tracking, personalized ablation profiles, and strict pre-screening protocols. Complications are uncommon when candidacy is selected correctly. At high-quality refractive centers, the major focus is not selling LASIK to everyone, but identifying the right procedure for each eye.
When LASIK Is Not Ideal
Some patients are better suited for alternatives such as PRK, SMILE, or ICL. Common reasons include thin cornea, very high power, irregular topography, severe dry eye, or lens-related vision changes after 40.
Book a Proper Refractive Evaluation
A real LASIK decision is made after full diagnostics, not just a quick eye chart test. You can book a detailed consultation at Consult and review LASIK treatment details at Lasik Surgery Mumbai.
Dr. Nikhil Nasta
Dr. Nikhil Nasta is the Founder & Lead Surgeon at iSight Eye Care. With over two decades of experience, he specializes in advanced cataract surgery and comprehensive eye care, dedicated to restoring vision and improving patients' quality of life.
Frequently Asked Questions
LASIK permanently reshapes the cornea for the treated power. Future age-related changes like presbyopia can still occur.
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Disclaimer: This information is for educational purposes only. Individual cases vary; consult a specialist for personalized advice.