Case 01
Disease treatment priority
If eye disease is the cause, treat first and check eye condition. If vision improves, surgery may not be needed.
Vision regression,
post-surgery treatment
Revision surgery
Vision decline symptoms are similar but causes vary by person.
Revision surgery requires more consideration than the first surgery,
so we identify root causes and proceed with customized treatment.
Why vision changes over time
Various factors can affect vision changes over time.
- Case 01Corneal surface changes
Corneal center becomes asymmetric,
or fine elevation, haze, irregular astigmatism
occurs - Case 02Eye length changes
Myopia progresses again due to remaining growth or structural changes lengthening the eye
- Case 03Corneal thickness changes
Cornea abnormally regenerates and thickens during recovery
- Case 04Lens and other eye diseases
Astigmatism, retinal disease, dry eye, conjunctivitis after cataract surgery affect vision
Why revision is needed
when vision regresses
Not just simple vision decline,
but can lead to light scatter, unstable focus, eye fatigue.
Without identifying the exact cause, vision may worsen,
so precise examination and safe correction through revision surgery is important.
NormalMyopia
Revision surgery process
- 01Precision diagnosis
Examine corneal thickness, topography, eye length to identify regression causes.
- 02Data analysis
Compare and analyze past surgery records and current corneal state.
- 03Dry eye treatment first
Fully restore eye condition before surgery.
- 04Revision surgery
Correct myopia regression with laser when conditions are met.
Generally, regression occurs in about 10~20% of corrected vision,
quick revision maintains vision recovery and stability.
quick revision maintains vision recovery and stability.
Precision examination system
finding root causes of vision decline
Vision, refraction test
Multi-angle vision measurement
Corneal topography cross-analysis
Irregular astigmatism, high-order aberration measurement
Corneal stiffness test
Post-surgery keratoconus detection
Corneal, epithelial thickness test
Latent keratoconus diagnosis
Cataract, glaucoma, retinal test
Age-specific disease screening
Dry eye and other disease tests
Treatment recommended to minimize
dry eye issues during revision
Revision is not immediate.
Optimal treatment, surgery timing
Case 02
Surgery priority
If previous surgery was incorrect or side effects from corneal surface imbalance, revision can correct with appropriate method.
Case 03
Monitor progress
If presbyopia or vision regression is progressing or unstable, revision can be done when vision stabilizes.
Advanced revision CASE
Case 01. Light scatter treatment
- Cause
Spherical aberration from narrow optical zone without considering pupil size
- Solution
Widen optical zone to reduce spherical aberration
Case 02. Center deviation
- Cause
Laser not accurately applied to corneal center
- Solution
Measure eye refraction error, align deviated center
Case 03. Corneal elevation and irregular astigmatism
- Cause
Corneal areas not cut during surgery or corneal surface distortion
- Solution
After corneal topography, cut only necessary areas to correct irregularity and asymmetry
Case 04. Corneal haze
- Cause
Occurs from wound healing, regression, infection, trauma after vision correction
- Solution
Analyze haze cause and degree, remove with laser, then amniotic membrane transplant and mitomycin treatment to prevent recurrence
Case 05. Keratoconus
- Cause
Conical protrusion from surgery without considering corneal thickness, epithelial thickness, front/back shape
- Solution
Severe cases: intrastromal ring, collagen cross-linking, corneal topography ablation, or corneal transplant
Small Optical Zone revision
When laser ablation range is narrow,
pupil exceeds ablation range in dark, causing light scatter or vision decline.
After precise analysis,
widen optical zone diameter to improve night vision quality.
NormalIrregular astigmatism
Irregular astigmatism and corneal haze correction
- Irregular astigmatism correction
Occurs when cornea is unevenly cut or center is misaligned.
Vision blurs and light scatters over time.
Identify cause through precise corneal topography,
realign surface with laser for clear vision. - Corneal haze correction
Cornea becomes opaque, light cannot pass evenly,
analyze haze depth and range for medication or laser removal.
Severe cases may need corneal transplant,
we provide customized management program to prevent recurrence.
Hospital trusted by doctors
Difference between specialists and experts
shown in results
Individual discomfort, blur, or halos may occur, requiring continuous follow-up and treatment.
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
