[The Secret of Vision Correction Surgery] Is it not just about eliminating myopia and astigmatism? (Feat. High-order and Low-order Aberrations)

Hello, this is Gangnam Smile Eye Clinic. 😊

What do you think is the role of vision correction surgery?

The biggest role of vision correction surgery is undoubtedly

to correct myopia, hyperopia, and astigmatism that one has,

achieving emmetropia and allowing one to remove their glasses and contact lenses.

But did you know that vision correction surgery now not only corrects myopia, hyperopia, and astigmatism,

but also eliminates high-order aberrations that interfere with the quality of vision?

Generally, factors affecting vision include

low-order aberrations and high-order aberrations.

Low-order aberrations are factors corresponding to myopia, astigmatism, and hyperopia, also known as refractive errors,

while high-order aberrations include coma, spherical aberration, and trefoil, which are responsible for the quality of vision.

First, aberration refers to an error that occurs when parallel light rays coming from a distance (far vision)

cannot perfectly converge at a single point.

If parallel light rays from a distance converge in front of where they should, it is myopia;

if they converge behind, it is hyperopia; and if they converge at two or more points, it is astigmatism.

These three types of aberrations, as mentioned earlier, fall under ‘low-order aberrations’,

and can usually be corrected with glasses, contact lenses, or vision correction surgery.

However, high-order aberrations, which are responsible for the quality of vision, cannot be corrected with ordinary glasses.

(Glasses can actually worsen spherical aberrations, etc.)

High-order aberrations are phenomena that occur when various elements that refract light, such as the tear film, corneal surface, or lens,

are not perfect, causing the light wavefront to be distorted.

Even if vision is measured at 1.0 emmetropia, due to these high-order aberrations,

there can be qualitative differences in vision, such as night vision, glare, and contrast sensitivity.

Generally, after LASIK or LASEK, the shape of the cornea becomes irregular,

the tear film becomes unstable, and high-order aberrations increase.

To prevent these side effects, Gangnam Smile Eye Clinic has introduced Co-Wave Today LASEK,

which smoothly ablates the corneal surface to minimize coma and spherical aberrations during surgery.

Co-Wave Today LASEK is a customized premium surgery that uses

an individual's unique eye data linked to the equipment.

It works by measuring the curvature of the cornea, which accounts for most of the refractive power,

and correcting the main factors that distort the light wavefront.

As shown in the corneal topography results in the image above, after Co-Wave LASEK,

the uneven corneal surface before surgery becomes smooth,

and image aberrations are significantly reduced.

Furthermore, one of the causes of high-order aberrations after vision correction surgery is an irregular tear film.

Our Gangnam Smile Eye Clinic's Co-Wave Speed-up LASEK

provides PRP autologous serum eye drops optimized for dryness and pain after surgery,

and Speed-up eye drops that stabilize the tear film and aid in rapid healing,

helping with the most crucial tear film stabilization process in the early stages of surgery,

thereby minimizing aberrations caused by an unstable tear film.

Our eyes are not perfect, and the reasons for high-order aberrations are very complex,

so some degree of high-order aberrations is inevitable in our eyes.

However, Gangnam Smile Eye Clinic always considers the patient's perspective,

고민하기에, and strives to minimize all discomfort after surgery.

Gangnam Smile Eye Clinic is equipped with the latest equipment and a systematic examination system,

providing sincere one-on-one customized consultations and surgeries for each individual.

We also always prioritize the patient, with transparency and safety as our top concerns.

For additional information regarding Today LASEK, please refer to the post below,

and if you have any other questions, please feel free to contact us :)

​https://blog.naver.com/smileeye2019/223565314225

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