Extreme Myopia, Hyperopia & Astigmatism Treatment in NYC
LASEK for patients with prescriptions too high for traditional LASIK
Advanced treatment for complex vision correction cases
Patients with extreme prescriptions are told they are not candidates for LASIK because too much corneal tissue would need to be removed.
This is especially common in patients with severe myopia, high hyperopia, or significant astigmatism.
At Park Avenue LASEK, Dr. Emil Chynn specializes in treating complex vision correction cases using advanced surface ablation techniques like LASEK and epi-LASEK.
These procedures preserve more corneal tissue, avoid flap complications, and safely treat prescriptions that exceed the limits of traditional LASIK.
Dr. Chynn has presented international research on advanced surface ablation for extreme myopia, hyperopia, and astigmatism, and has performed more LASEK procedures than any other surgeon in the United States.
WHY EXTREME PRESCRIPTIONS ARE COMPLEX
Patients with extreme prescriptions require more laser correction, which means more corneal tissue must be removed.
Traditional LASIK becomes less safe as prescriptions increase because creating a corneal flap weakens the structural integrity of the cornea.
This is why many patients with high myopia, hyperopia, or astigmatism are told they are not candidates for LASIK.
WHY LASEK FOR EXTREME PRESCRIPTIONS
LASEK is a flap-free laser vision correction procedure that preserves more corneal tissue than LASIK.
Because no corneal flap is created, the structural integrity of the cornea remains stronger after surgery.
This allows Dr. Chynn to safely treat prescriptions that are often outside the safe treatment range for LASIK.
- Extreme myopia (severe nearsightedness)
- High hyperopia (severe farsightedness)
- High astigmatism
- Thin corneas
- Complex or previously rejected cases
Extreme Myopia
Patients with extreme myopia require more tissue removal than LASIK safely allows.
LASEK preserves more corneal tissue and safely treats prescriptions as high as -19.00 in properly evaluated patients.
High Hyperopia (Severe Farsightedness)
Hyperopia is more difficult to treat than myopia because the corneal reshaping pattern is more complex.
LASEK allows for precise treatment while avoiding flap-related complications associated with LASIK.
High Astigmatism Treatment
Patients with severe astigmatism often experience blurred or distorted vision at all distances.
LASEK allows for highly customized correction patterns that improve visual clarity while maintaining corneal stability.
| Comparison | Traditional LASIK |
Preferred for Complex Cases
LASEK
|
|---|---|---|
|
Extreme Myopia (High Nearsightedness) |
Limited High prescriptions require significant tissue removal, which can weaken the cornea after flap creation. |
Better for High Prescriptions Preserves more corneal tissue and safely treats stronger prescriptions in properly evaluated patients. |
|
High Hyperopia (Severe Farsightedness) |
Less Predictable Higher hyperopic corrections become more difficult due to flap-related structural changes. |
More Conservative Approach Maintains greater corneal integrity while allowing customized correction patterns. |
| High Astigmatism |
Higher Structural Stress Large corrections combined with flap creation increase biomechanical strain on the cornea. |
Customized Surface Treatment Allows highly precise correction while preserving long-term corneal stability. |
| Thin Corneas |
Frequently Not Recommended LASIK flaps remove additional tissue, reducing overall corneal thickness. |
Commonly Evaluated No corneal flap is created, allowing more tissue preservation for safer treatment. |
| Corneal Flap |
Required A permanent flap is created in the cornea before laser treatment. |
No Flap Surface-based treatment preserves corneal structure and avoids flap-related complications. |
| Dry Eye Risk |
Higher Corneal nerves involved in tear production are more affected after flap creation. |
Lower Surface-based treatment preserves more nerve integrity and reduces long-term dryness risk. |
| Complex Cases |
Often Declined Many patients with extreme prescriptions are told they are not candidates for LASIK. |
Specialized Evaluation Designed specifically for patients requiring a more advanced and conservative approach. |
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102 E 25th St, New York, NY 10010
