In laser eye surgery, the femtosecond laser creates a corneal flap using ultra-short infrared pulses, while the excimer laser then reshapes the underlying tissue to correct vision using ultraviolet light. Femtosecond lasers offer precision and control by creating a controlled incision, whereas the excimer laser vaporizes and sculpts the corneal tissue to correct vision defects. Femto-LASIK procedures use both lasers sequentially, with the femtosecond laser making the initial incision for the flap and the excimer laser performing the deeper correction

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A femtosecond laser is a type of laser that emits extremely short pulses of light, lasting for only a quadrillionth of a second (a femtosecond). This incredibly short pulse duration allows for precise and controlled material processing, making it useful in various applications such as eye surgery.

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What is laser eye surgery (or excimer laser treatment)?​

Laser eye surgery (excimer laser) is associated to a therapy that rectify myopia, hyperopia or astigmatism. The operation could lessen or remove the necessity for contact

spectacles or eyewear. In a typical eye, the front of the eye (cornea), the eye's lens and the structure of the eye directs light to create an

picture on the rear inner surface of the eye (retina).

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Nearsightedness (myopia) happens when light is focused in front of the retina rather than directly on it

the retina. This results in the picture of far-off items to seem fuzzy.

 

Farsightedness (hyperopia)happens when light extends past the retina. This leads to pictures of nearby objects to seem hazy.

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Astigmatism happens when the shape of the eye is not circular but formed like a football ball. This

unusual form results in images being visibly fuzzy. Astigmatism may coexist with either hyperopia or myopia.

 

In what way does excimer laser surgery improve vision?​

Brief bursts of unseen ultraviolet light eliminate a tiny quantity of tissue from the

cornea to adjust the curvature. The quantity taken away is usually smaller than the

diameter of a human hair. Through adjusting the shape of the cornea, images are

more accurately aimed at the retina and the visuals are sharper.

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What exactly is LASIK?

LASIK (laser-aided in situ keratomileusis)

is a corrective surgery where the

femtosecond laser is employed to generate a thin flap off the corneal surface. 

The thickness of the corneal flap ranges from 100 to 140 microns. The corneal flap is subsequently raised, and the excimer

Laser is utilized to reshape the leftover.

cornea to achieve the intended correction.

The flap is subsequently placed back on the cornea layer above the processed region.

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What is PRK?

PRK (photorefractive keratectomy) is a

surface optical procedure in which the

epithelium (outer layer of the cornea) is

eliminated utilizing:  20% alcohol ,an Excimer laser , or a rotating device specific brush. The excimer laser is subsequently utilized to reshape the cornea and achieve the intended

adjustment. Upon finishing, a contact lens

or an eye covering is used.

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What are the benefits of undergoing the LASIK procedure instead of PRK?

Some benefits include less post-operative pain during the initial 1 to 5days, a quicker restoration of eyesight, reduced reliance on steroid drops, and lower risk of

corneal opacity.

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What are the drawbacks of undergoing the LASIK procedure VS PRK?

The drawbacks of the LASIK procedure include the complications associated with the

existence of the corneal flap – flap displacement, corneal ectasia, striae, epithelial

invasion and contamination. The safety related to LASIK technique for individuals with a significant level of myopia has not been confirmed.

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How to understand Wavefront measuring sensor?

A wavefront sensor is a device used to identify optical imperfections in the eye.

The technique logs these irregularities or flaws and computes a tailored therapy(CustomVue) for the excimer laser. This technique can be applied alongside PRK or iLASIK. A CustomVue procedure is distinct from traditional laser eye surgery. It considers not just your eyeglass prescription, but also all of the additional visual imperfections in the eye.

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Is Laser surgery safe?

Many people around the globe have experienced this successful treatment for nearsightedness, farsightedness

and astigmatism.

 

Based on studies conducted at the Eye Institute of University of Ottawa, the 1-year post

Operative outcomes show that 99% of patients attain results of 20/50 or higher (adequate sight to secure an unrestricted provincial driver’s license). More than 80% of patients attain outcomes of 20/20 , and over 90% reached

20/25 or better. These outcomes pertain to individuals with a diverse array of prescriptions.

from -12D to +4.5D with different levels of astigmatism between 0.25 to 4.5D.

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Always follow directives given by your physician. This should not be considered as substitute of medical advice.

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