EPIC PRK™ and LASEK Eye Surgery in Los Angeles
What is EPIC PRK™ and LASEK laser vision correction?
PRK, which stands for photorefractive keratectomy, and LASEK (short for laser-assisted sub-epithelial keratectomy) are two closely related types of vision-correcting laser eye surgery. They both reshape the cornea (the front part of the eye) to correct each individual’s refractive errors.
EPIC PRK or LASEK surgery may be an option for those unsuitable LASIK candidates for reasons we’ll discuss.
Dr. Assil explains the ins and outs of PRK
What’s the difference between LASEK, EPIC PRK, and LASIK eye surgery?
The main difference between PRK (FDA-approved in 1995), LASEK, and LASIK (both FDA-approved in 1999) is with the epithelium, the transparent, thin, outermost layer of the cornea that covers the front of your eye.
EPIC PRK
In EPIC PRK, the epithelium (located on the surface of the eye) is completely removed and discarded, but don’t worry, it grows back in three to seven days. Then the exposed corneal tissue is reshaped using an excimer laser (which removes microscopic amounts of tissue from the cornea) to correct your vision. Then, a soft bandage contact lens will be placed on the eye to accelerate epithelial layer regrowth and make your eye’s surface more comfortable during the healing phase.
LASEK
In LASEK, the epithelium layer is not removed but chemically loosened before a laser is used to create a flap in the epithelium. The flap is gently folded back, exposing the underlying layer of the cornea. Then the exposed corneal tissue is reshaped with the same excimer laser we use during PRK.
After our laser reshapes the exposed corneal tissue, the epithelial flap is folded back on the cornea. A soft bandage contact lens may also be placed on the eye to promote healing.
LASIK
With the LASIK procedure, our surgeon creates a thin flap from your cornea’s outer layer (the epithelium) and a thin portion of the underlying middle layer, known as the stroma. This flap is then peeled back, and laser sculpting is done on the cornea’s middle stromal layer. After the sculpting, the flap is repositioned to cover the LASIK surgery site, and the epithelium remains intact.
LASIK’s main advantage over PRK is the preservation of the central corneal epithelium. This increases comfort during the early post-operative period, allows for rapid visual recovery, and reduces the wound-healing response.
What is EPIC PRK and how is it different?
Dr. Kerry Assil developed EPIC PRK by leveraging his decades of experience in eye anatomy and AGEI’s unparalleled access to advanced imaging technologies. In doing so, he developed a unique algorithm that enables the exquisitely precise excimer laser to perform both epithelial removal and stromal sculpting.
Our algorithm determines the variable epithelial thickness overlying the surface for each eye, ensuring that the removal is both complete and confined to the most central portion of the corneal surface.
In addition, by measuring the dimensions of each patient’s unique pupils and their response to light, a patient’s candidacy is established to receive this treatment. In EPIC PRK, the stromal sculpting of the eye is customized to precisely fall within the same zone as the epithelial removal.
This means the surface areas of the two treated layers (epithelium and stroma) are perfectly superimposed.
Unlike with standard PRK and LASEK, the removed surface epithelial diameter is no longer any larger than the stromal sculpting.
Furthermore, EPIC PRK doesn’t use any chemicals or mechanical abrasion (as standard PRK does) because the only tool that interacts with the eye is the laser. This makes EPIC PRK an “all-laser” procedure, like LASIK.
Thus, the resurfacing (healing) occurs much faster and with far less irritation than with standard PRK or LASEK.
Hence, EPIC PRK serves as an acronym for Epithelium and Pupilometry Integration Customized, Photo Refractive Keratectomy
Why would a patient choose EPIC PRK (or LASEK) over LASIK?
Though LASIK is far and away the most popular laser vision correction surgery today, there are reasons that LASIK may not be a good option. These reasons include the following:
Thin corneas
LASIK (and LASEK) requires creating a corneal flap and may not be suitable for people with thinner corneas. PRK surgery does not require a flap and leaves a larger portion of the cornea untouched, which is essential for patients with thin corneas or at risk for future eye problems.

Very nearsighted or farsighted (myopia)
More severe near– or farsightedness can be an exclusionary factor for patients who desire LASIK. However, PRK and LASEK can do an excellent job of correcting high degrees of nearsightedness.
Dry eyes
Dry eye disease (when tears can’t provide adequate lubrication for the eyes) can be an exclusionary factor for LASIK. Corneal nerves heal faster with LASEK, minimizing dry eye symptoms that can sometimes occur after surgery. This procedure could be a good alternative, as dry eye is less of a concern with PRK.
Patients with larger pupils
Larger pupils can sometimes lead to side effects after LASIK, like halos and starbursts, which is usually not the case with EPIC PRK or LASEK.
Corneal dystrophies or corneal irregularities
PRK or LASIK might not be the best choice if you have specific corneal abnormalities. Since LASEK involves a shallower laser treatment of the corneal surface than LASIK or PRK, it may provide an additional margin of safety for patients with unusual corneal shapes who don’t qualify for or choose not to undergo LASIK.
Recurrent corneal erosion
This is another circumstance where LASIK might not be an appropriate vision correction procedure. LASEK involves a shallower laser treatment than LASIK, so more corneal thickness is preserved, which can benefit these patients.
Procedure preference
Some individuals opt for PRK or LASEK over LASIK, particularly military personnel such as pilots, when Eagle Vision LASIK is not available to them.
You may have read that people with occupations or hobbies, or who play physically jarring contact sports, could be better candidates for LASIK. This is no longer true, thanks to the development of Eagle Vision LASIK by Dr. Kerry Assil!
Eagle Vision LASIK has become the choice of some of the world’s most talented and successful professional athletes. These include LeBron James, Anthony Davis, Paul George, Chris Paul, and Sugar Shane Mosley, to name just a few.
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Call now or book your appointment online.
What are some disadvantages of PRK or LASEK?
There are advantages and disadvantages to every surgical procedure. Some of the disadvantages of PRK or LASEK (when compared to LASIK) can include:
- Slower recovery time than LASIK: most patients can drive 4-6 days after surgery, and vision fluctuations can take 3 months to 1 year to stabilize.
- There is an increased risk of early post-surgery eye infection, inflammation, and haze. Patient compliance with post-operative eye care is essential.
- While healing from PRK or LASEK, you may experience post-operative discomfort, which is more common than with LASIK.
Who is not a good candidate for EPIC PRK or LASEK?
Like with LASIK, certain eye conditions or circumstances would preclude you from being a good candidate for PRK or LASEK. These include a patient with:
- An unstable (changing) refractive error
- Skin or another disease that can affect healing
- A history of excessive corneal scarring
- Corneal scars or corneal disease
- Advanced Glaucoma
- Cataract affecting vision
- Uncontrolled diabetes
- Pregnant or nursing women
- A history of certain eye infections
Which is best for me, EPIC PRK, LASEK, or LASIK?
Choosing the best vision correction surgery is never a one-size-fits-all decision. That is why Assil Guar Eye Institute offers complimentary evaluations with our ophthalmologists to ensure you obtain 100% accurate information about which type of refractive surgery would best suit your vision needs and lifestyle.
Ready to consider EPIC PRK or LASEK? You owe it to yourself to talk with the Assil Gaur Eye Institute experts.
Assil Gaur Eye Institute’s nationally recognized ophthalmologists and optometrists are expertly trained in PRK, LASEK, and LASIK. Also, our eye centers offer state-of-the-art treatments for all eye conditions, including glaucoma, macular disease, dry eye, and diabetic eye conditions, to name just a few.
Our complimentary LASIK eye exam is convenient for patients throughout Southern California and the Los Angeles area, including Beverly Hills, Santa Monica, West Los Angeles, West Hollywood, Culver City, Hollywood, Venice, Marina del Rey, Malibu, Manhattan Beach, and Downtown Los Angeles.
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Call now or book your appointment online.
EPIC PRK FAQs
How long does EPIC PRK last?
The effects of EPIC PRK are generally considered permanent, and it’s important to note that as we age, our eyes can change, and vision can gradually worsen. Therefore, while PRK can provide long-lasting correction, it doesn’t prevent age-related eye changes that may require glasses or contacts later in life.
How to speed up PRK recovery?
Recovery after EPIC PRK surgery can take several days to a few weeks. While the recovery period cannot be avoided entirely, some steps can be taken to help speed up the healing process.
- Following your doctor’s post-operative instructions is crucial, including using any prescribed eye drops, avoiding rubbing your eyes, and protecting them from bright light and dust.
- Rest and avoid strenuous activities such as exercising, swimming, and heavy lifting.
- Use lubricating eye drops as your doctor directs to keep your eyes moist and comfortable.
- Wear protective eyewear such as sunglasses or goggles outdoors to protect your eyes from dust, wind, and other environmental factors.
- A diet rich in antioxidants and omega-3 fatty acids can help promote healing and reduce inflammation.
- Avoid smoking and alcohol consumption which can slow healing and increase the risk of complications.
How long after EPIC PRK can I watch TV?
It’s important to avoid activities that could strain your eyes, including watching TV or using a computer, for the first few days after surgery.
Your doctor will provide specific instructions on when it’s safe to resume normal activities, including watching TV. Most people can resume watching TV and using a computer within a few days to a week after surgery
Is EPIC PRK better than LASIK?
Both procedures effectively treat common vision problems such as nearsightedness, farsightedness, and astigmatism, but they differ in how the surgery is performed and the recovery process.
Ultimately, choosing between EPIC PRK and LASIK should be made in consultation with our experienced eye surgeon, who will evaluate your needs and recommend the benefits of PRK, LASEK, or LASIK.
How long does EPIC PRK surgery take?
The actual EPIC PRK surgery typically takes only less than 15 minutes per eye. However, the process may take several hours, including pre-operative preparations and post-operative follow-up appointments.
Can you get EPIC PRK twice?
Technically, you could, though it is infrequent at Assil Gaur Eye Institute. Sometimes a new patient comes to us after an unsuccessful initial PRK surgery elsewhere that did not fully correct the refractive error, or the patient’s vision may have changed over time, thus requiring revision surgery.
It’s important to note that undergoing a second PRK surgery can be more challenging than the first, as the cornea may be thinner and more fragile due to the previous surgery. Additionally, there may be an increased risk of complications such as haze and cornea clouding that can affect vision.
Does EPIC PRK hurt?
During EPIC PRK surgery, the patient typically does not experience any pain or discomfort. This is because the LASIK surgeon will use numbing drops, and the patient may also be given a mild sedative to help them relax. The patient may experience pressure on the eye’s surface, but most report no discomfort.
After the surgery, however, it is common to experience some discomfort or mild to moderate pain.
The discomfort experienced after PRK can vary from person to person and typically lasts a few days to a week. Pain relievers and lubricating eye drops can help manage discomfort during this time.
Does EPIC PRK fix astigmatism?
Yes, EPIK PRK surgery can effectively treat astigmatism, a standard refractive error that causes blurred or distorted vision at all distances. It’s important to note that while PRK can be an effective treatment for astigmatism, it is not a guarantee of perfect vision. Some patients may need to wear glasses or contact lenses after surgery, particularly for reading or other close-up work.
How long does blurry vision last after EPIC PRK?
Blurry vision is a common side effect after PRK, and its duration can vary depending on several factors.
Generally, blurry vision can take several days to weeks to improve after EPIC EPIC PRK. During the first few days after surgery, vision may be blurry, and daily activities such as driving or reading can be challenging. The blurry vision typically improves as the eye heals, but it may fluctuate for several weeks or months after surgery.
Can you get LASIK after EPIC PRK?
Yes, getting LASIK after EPIC PRK is possible. One factor to consider is the amount of corneal tissue removed during the PRK procedure. LASIK involves creating a flap in the cornea to access the underlying tissue. If too much tissue was removed during the PRK procedure, there might not be enough corneal tissue to create the flap for LASIK safely. Additionally, the shape of the cornea after PRK may not be suitable for LASIK, and other vision correction options may be recommended.
Another factor to consider is the time since the PRK procedure. Waiting at least six months to a year after PRK before undergoing LASIK is recommended to allow the cornea to heal fully and stabilize.
Can you get EPIC PRK with astigmatism?
EPIC PRK may be a good option for individuals with mild to moderate astigmatism. In some cases, other types of refractive surgeries, such as LASIK, may be recommended, depending on the severity and type of astigmatism and other factors such as age, prescription, and overall eye health.
Does EPIC PRK correct nearsightedness and farsightedness?
Yes, EPIC PRK (Photorefractive Keratectomy) is an effective procedure for correcting both nearsightedness (myopia) and farsightedness (hyperopia).
Can you wear contacts after EPIK PRK?
During the initial healing period after EPIC PRK, the eyes may be more sensitive and drier, and wearing contact lenses can exacerbate these symptoms. Additionally, contact lenses can interfere with the healing process and affect the final visual outcome.
Once your eye doctor determines that your eyes have healed sufficiently and it’s safe, they may recommend a specific type of contact lens or a contact lens wearing a schedule appropriate for your needs.
Does EPIC PRK cause dry eyes?
EPIC PRK can cause dry eyes in some individuals, particularly during the initial healing period after surgery. The procedure can temporarily affect the corneal nerves and reduce tear production, leading to dry eye symptoms.
The symptoms of dry eye after PRK are usually temporary and improve as the cornea heals. However, in some cases, dry eye symptoms may persist or worsen after surgery, and additional treatment may be necessary to manage the condition.
How long after EPIC PRK can I use a computer?
After EPIC PRK, it’s generally safe to use a computer and other electronic devices once your vision has stabilized and you feel comfortable doing so. However, avoiding prolonged use of electronic devices during the initial healing period is essential, as this can put additional strain on your eyes and delay the healing process.
How long after EPIC PRK can I wear eye makeup?
After EPIC PRK, it’s generally recommended to avoid wearing eye makeup for at least a week or until your surgeon gives you the green light to resume using it. Eye makeup can irritate the eyes if it gets in and increase the risk of infection during the initial healing period.
How soon can you exercise after EPIC PRK?
After EPIC PRK, it’s generally recommended to avoid strenuous exercise and other physically demanding activities for at least a week. This is because physical activity can increase blood flow and pressure in the eyes, interfering with the healing process and increasing the risk of complications.
Can you have cataract surgery after EPIC PRK surgery?
Yes, it is possible to have cataract surgery after undergoing EPIC PRK.
What are the Pros and Cons of EPIC PRK Vision Surgery?
EPIC PRK is a highly effective laser vision correction procedure that can deliver long-term results similar to LASIK, especially for patients with thin corneas or active lifestyles. However, it does come with a longer recovery time, temporary discomfort, and potential side effects like dryness or light sensitivity during healing. Learn more about the pros and cons of PRK vision surgery.


