Point 01
Precise calculation needed
due to corneal structure change
After refractive surgery, corneal curvature changes, making accurate IOL power calculation difficult with standard formulas.
Cataract after vision correction surgery
Eyes that had LASIK·LASEK etc. have changed corneal shape, so standard IOL power calculation may cause errors.
Precise exams and skilled specialist diagnosis are essential for accurate vision recovery.
Eyes that had surgery once,
need careful judgment and expertise.
Eyes that had LASIK·LASEK·SMILE have different corneal structure than normal eyes.
Curvature calculation, IOL power calculation, glare—all processes are much more complex,
making experienced team with precise equipment crucial.
Why is cataract surgery difficult after vision correction?
Precise calculation needed
Point 02
Vision prediction
complexity
Post-surgery vision prediction is more challenging than normal patients, depending on pre-surgery refraction and corneal ablation range.
Point 03
Caution needed when choosing
multifocal IOL
Glare and contrast reduction may overlap, requiring careful selection of complex optical design lenses.
Point 04
Accurate IOL selection difficult
without special equipment
Without post-refractive cataract power calculation formulas, IOL power error risk increases.
Cataract after LASIK / LASEK / SMILE
Eyes that had LASIK·LASEK·SMILE have changed corneal shape, requiring more precise calculation and analysis than standard cataract surgery. Latest diagnostic equipment and custom IOL selection enable safe, clear vision recovery matching past surgery history.
Also, high myopia or pathological myopia often involves optic nerve and retinal abnormalities, requiring accurate diagnosis and treatment.
- Check and treat comorbidities through pre-surgery precise exams
- Measure eye with most accurate latest equipment, plus team's accumulated experience for most accurate IOL power calculation
- LASIK/LASEK/SMILE patients can also correct cataract and presbyopia simultaneously
Cataract after lens insertion
If lens insertion was done before, the previously inserted lens must be safely removed first during cataract surgery. Unexpected damage or variables in this process can affect surgery results.
More difficult than simple cataract surgery. Especially with severe anterior capsular opacification, anterior capsulotomy—the most critical step—is difficult, increasing complication frequency, so skilled specialist care is important.
- Lens insertion patients can also correct cataract and presbyopia simultaneously
Cataract after radial keratotomy
Radial Keratotomy (RK) causes irregular astigmatism and is no longer performed. Cataract surgery also requires advanced analysis for power calculation and astigmatism prediction.
- RK incisions make corneal shape irregular, making astigmatism prediction difficult. Standard calculation has high error risk, so RK-specific IOL power calculation formula applied
- Multi-stage exams: anterior·posterior corneal curvature, corneal topography, wavefront analysis
- Custom surgery path design considering incision pattern
First Eye's precise diagnosis process
Step 01
Accurately measure eye key data
with 10+ precision equipment
Traditional equipment calculates based on pre-LASIK corneal model, giving lower or higher values than actual, making IOL power inaccurate. Latest equipment needed for accurate measurement.
Step 02
Use advanced IOL power calculation
equipment and technology
Even without prior surgery data, minimize power error based on experience with latest measurement equipment and precision formulas.
Step 03
Carefully decide monofocal or
multifocal lens
Analyze patient lifestyle, vision characteristics, residual accommodation to select suitable IOL.
Step 04
Close monitoring until
post-surgery vision stabilizes
Post-refractive cataract patients may have different vision adaptation periods, so post-surgery follow-up is carefully conducted.
Hospital trusted by doctors
Difference between specialist and expert
shown in results
Individual discomfort, blur, or halos may occur. Continuous monitoring and treatment needed.
Why Choose First Eye
Doctors' Doctor,
Director Yun
Trusted clinic chosen by many
Expert in complications,
revision surgery
Premium system
with advanced equipment
Lifetime doctor
system
