LASIK (Laser in-situ Keratomileusis) is a surgical procedure combined with laser to reshape the cornea in order to correct refractive errors including myopia, hypermetropia and astigmatism. Laser refractive surgery was introduced in Hong Kong in 1992, and The Hong Kong Eye Day Surgery Centre had provided such services since its inception. Tens of thousands of patients had received the procedure successfully since 2005. Our centre has experienced attending doctors, all specialists in ophthalmology and professionally trained in refractive surgeries. With more than a decade of experience and after more than ten thousand cases, our results have been both satisfactory and reliable.
The WaveLight EX500 Excimer Laser System can correct 1.00 dioptre of myopia or astigmatism in just 2.5 seconds. The aspheric property of the cornea (known as the ‘Q value’) may affect visual quality under dim lighting conditions. The German manufacturer Wavelight pioneered wavefront-optimised ablation profiles, thus integrating an important wavefront-guided treatment feature in standard laser vision correction. The small diameter of the spot allows a high-precision contouring of the correction profile, while minimising the total overall ablation depth. A wavefront-optimised beam profile together with small laser spots allow operations in large optical zones and ensure optimal transitional zones. As a result, patients have the best quality image even under demanding lighting conditions with the least amount of distortions.
Laser refractive surgery is a procedure that can correct visual problems such as myopia, hyperopia, and astigmatism by altering the shape of the cornea. By modifying the cornea's curvature, the surgery aims to adjust the refraction of light, enabling it to accurately focus on the retina.
LASIK surgery consists of first creating a partial thickness lamellar flap of the cornea and followed by laser polishing of the underlying stromal bed. The cornea curvature is therefore reshaped as programmed and the refractive outcome achieved accordingly. After laser application, the cornea flap is replaced and heals naturally.
 A partial thickness lamellar flap of the cornea is created. |
 Laser is applied to the underlying stromal bed of the cornea, reshaping as programmed. |
 The cornea flap is replaced and heals naturally. |
|
A partial thickness lamellar flap of the cornea is created. |
Laser is applied to the underlying stromal bed of the cornea, reshaping as programmed. |
The cornea flap is replaced and heals naturally. |
After undergoing the preoperative eye examination, the doctor will determine the suitable surgical options for you. You can also discuss with the doctor to make a decision together.
| SMILE PRO | SMILE | LASIK | ICL | |
|---|---|---|---|---|
| Degree of correction | Up to -10.00 diopters of myopia Up to -5.00 diopters of astigmatism |
Up to -15.00 diopters of myopia Up to +6.00 diopters of hyperopia Up to +6.00 diopters of astigmatism |
Up to -18.00 diopters of myopia Up to +10.00 diopters of hyperopia Up to +6.00 diopters of astigmatism |
|
| Technique | Cornea cutting; no need for cornea flap creation | Creation of corneal flap, followed by laser reshaping of the corneal inner layer beneath the flap | Implantation of ICL lens between the eye's natural crystalline lens and iris | |
| Surgical duration | 5 minutes per eye | 10 minutes per eye | 10-15 minutes per eye | |
| Laser procedure time | 10 seconds per eye | 25 seconds per eye | I. Corneal flap creation: approximately 10 seconds II. Corneal reshaping (depending on the degree): 10-30 seconds |
NA |
| Size of incision | 2-4mm | Approximately 20mm | Approximately 3mm | |
| Postoperative dry eye condition | Slight | Mild | Slight | |
| Natural cornea healing time | Several days | Several weeks | Several days | |
| Chance of cornea flap displacement | None, no need for cornea flap creation | Yes | None, no need for cornea flap creation | |
| Odor produced during the surgical procedure | None | Slight burning odor | None | |
Corneal Collagen Cross-Linking (CXL) is a surgical technique used to enhance corneal strength in the treatment of corneal deformities and weakening conditions, primarily for the management of keratoconus.
Conventional laser refractive surgeries can weaken the cornea. However, the enhanced versions (Xtra) of LASIK Xtra and SMILE Xtra surgeries are specifically designed for individuals with higher refractive errors and thinner corneas. These procedures utilize cross-linking techniques to strengthen the cornea's collagen structure, thereby consolidating the refractive correction outcomes.
Corneal Collagen Cross-Linking (CXL) Procedure:
In general, if you fulfill the requirements below, you are a suitable candidate:
To find out if LASIK is suitable for you, you should have a comprehensive eye examination by our ophthalmologist. During the examination, we will give you more specific information and answer any questions you may have.
You are welcome to attend our public free seminar to learn more about laser vision correction surgery before undergoing the preoperative examination and assessment. Please call 8166 1111 for more information or register for the "Free Vision Correction Seminar" by clicking here.
