Photorefractive Keratectomy (PRK) in Moscow
When glasses or contact lenses begin to interfere with work, driving, and everyday visual activities, patients often consider laser vision correction.
At K+31, photorefractive keratectomy and PRK in Moscow are performed only after a thorough diagnosis. The doctor evaluates the thickness and shape of the cornea, the condition of the tear film, refraction, and any potential limitations.
This approach helps determine whether vision correction is safe for a particular patient.
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What is photorefractive keratectomy and how does it help improve vision?
Photorefractive keratectomy is a superficial laser procedure. The doctor removes the corneal epithelium and then performs precise reshaping. After reshaping the cornea, light is focused closer to the desired area of the retina.
This laser vision correction helps reduce dependence on glasses and contact lenses.
PRK Principle
With PRK, the surgeon does not create a corneal flap. After surface preparation, superficial ablation is performed: an excimer laser vaporizes a microscopic volume of tissue according to a program. Finally, a bandage lens is placed on the eye to protect the cornea during the healing phase.
Myopia occurs because light rays are concentrated in front of the retina rather than on it. Therefore, distant vision becomes blurred:
- It is difficult to distinguish license plates.
- Distant faces
- Text on a screen or road signs
Astigmatism causes uneven focusing because the cornea or lens refract light differently in different directions. Because of this, the image may be distorted even in good lighting.
Before laser correction, the doctor checks whether the corneal optical power can be safely changed.
How does PRK differ from other laser vision correction methods?
The difference between PRK and LASIK is related to how the doctor accesses the laser treatment area.
- LASIK creates a corneal flap.
- With PRK, the procedure is performed from the surface of the cornea, after removing its epithelial layer.
Therefore, healing usually takes longer, but the cornea does not undergo the flap creation phase.
In clinical situations where maintaining its biomechanical stability is important, surface laser correction may be a more appropriate option. After diagnosis, excimer laser correction is selected not by the method name, but based on the condition of the individual patient's eye.
Who is PRK suitable for?
PRK is considered in adult patients when vision remains stable and there are no signs of refractive error progression. The doctor evaluates the method for myopia, astigmatism, and mixed refractive errors, if diagnostic data allows for safe corneal manipulation. The following are important:
- Corneal thickness
- Corneal shape
- Tear film condition
- Overall eye health
The prognosis after correction depends on the initial parameters and how closely the patient adheres to the prescription during the recovery period.
Indications for photorefractive keratectomy
Indications for PRK are determined by more than just a single number in the eyeglass prescription. The doctor considers the patient's complaints, corneal thickness, corneal topography data, refractive stability, and the condition of the ocular surface.
This method is often considered if LASIK or SMILE are not the best option. In this situation, photorefractive keratectomy allows for correction without creating a flap.
Before the procedure, it is important to determine whether the eye is ready for the procedure. Typically, the doctor includes the following steps in preparation:
- Ophthalmologist consultation
- Visual acuity test
- Corneal topography
- Corneal pachymetry
- Evaluation of contraindications
After the diagnosis, the patient receives a clear plan. The doctor explains whether the surgery is suitable.
When we recommend considering another method
Even with a strong desire, PRK is not suitable for everyone. The doctor may suggest an alternative option if refraction is unstable, there is severe dry eye syndrome, inflammation, or keratoconus is suspected. Contraindications to PRK are discussed calmly and in detail during the consultation.
Sometimes the doctor recommends not rushing the surgery. First, you need to:
- Remove the inflammation
- Normalize the tear film
- Check the associated risks with another specialist
Once the time constraints are lifted, the laser correction can be reconsidered.
General information
Advantages of PRK as a Vision Correction Method
PRK remains in demand, despite the emergence of newer technologies in ophthalmology. This method does not involve the creation of a corneal flap. For some patients, this type of vision correction offers a balance between effectiveness and tissue preservation.
Why PRK is Chosen for Thin Corneas
If a patient has a thin cornea, the doctor carefully calculates the residual tissue thickness after surgery. With flap techniques, a portion of the cornea is used to create a flap.
With PRK, a flap is not created, so the conditions may sometimes appear more favorable. However, the decision depends on corneal topography, pachymetry, and corneal shape analysis.
A thin cornea does not automatically mean surgery is possible. Sometimes excimer laser correction is possible, but sometimes another method of vision correction is safer.
When is this method especially convenient for the patient?
This method is often discussed with people for whom the strength of the superficial structures of the eye is important:
- Active sports
- Professions with risk of injury or stress
- Where a corneal flap is undesirable
If the patient is prepared for a more gradual healing process and follows the instructions, laser vision correction can be comfortable in the long run. The doctor explains the restrictions and follow-up visits in advance.
PRK, LASIK, or SMILE: Which to Choose?
| Method | Flap | Reconstruction | Who might benefit from it |
|---|---|---|---|
| PRK | No | Longer | With a thin cornea, active lifestyle |
| LASIK | Yes | Usually faster | With suitable corneal thickness |
| SMILE | No | Usually soft | For myopia and astigmatism, as indicated |
Frequently Asked Questions
Questions before surgery are normal. It's important for patients to understand what they'll feel and why the doctor is recommending this particular method. Below are brief answers to frequently asked questions during the consultation.
Is PRK painful?
How long does recovery after PRK take?
How does PRK differ from LASIK?
Who is this method particularly suitable for?
Sign up for a consultation
If you're considering laser vision correction in Moscow, start with a diagnosis. This will determine whether the surgery is feasible, which method is safer, and what to expect after the procedure. At K+31, the consultation includes a detailed explanation of the results. The patient receives a medical plan.
Why is it important to undergo a diagnosis before the procedure?
Without a diagnosis, it's impossible to determine whether the cornea can withstand the procedure and which correction method is safer. The doctor examines the thickness, shape, surface of the eye, refractive stability, and associated factors.
Sometimes the examination confirms that photorefractive keratectomy is appropriate. Other times, it suggests that it's better to choose another method or postpone the surgery.
How we help you choose the optimal correction method?
At K+31, we compare options based on medical data, not technology popularity. The patient is explained:
- The difference between the methods
- Recovery time
- Limitations
- Prognosis
If PRK is suitable, the doctor explains the preparation, surgery, and follow-up visits.
An appointment with an ophthalmologist helps move from doubt to decision. Come for a diagnostic examination at K+31 if you want to understand whether photorefractive keratectomy is right for you and which vision correction method is best suited for your specific situation.
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