SMILE technology

Why SMILE? 

The SMILE method uses a single laser (i.e. the patient does not have to switch between several lasers during the procedure), which emits numerous short pulses extremely rapidly. On the one hand, the laser produces a thin layer below the surface of the eye and, on the other hand, creates a tiny opening on the surface of the eye. 

Use of a femtosecond laser: This laser is programmed to glide gently through the upper layers of the cornea to the tissue layer where the lenticule is prepared. Neither the outer layer of the cornea is removed, nor is more than a single, tiny incision necessary on the surface of the eye. In addition, important corneal nerves that stimulate the lacrimal (tear) glands are less affected, which is why the eye continues to be supplied with sufficient moisture. 

Treatment

Before undergoing the SMILE procedure, patients should pay attention to the following: 

• Do not wear hard contact lenses for at least four weeks prior to surgery 
• Do not wear soft contact lenses for at least one week before surgery 
• Do not apply any make-up, perfume or body lotion on the day of the procedure 
• Arrange for someone to collect you, as you are not allowed to drive your own car after the operation (you may also not be permitted to do so on the next few days after surgery)  

The procedure takes place on an outpatient basis and lasts an average of 20 minutes for both eyes. 

1. Anaesthetisation of the eye with anaesthetic eye drops 
2. Immobilisation of the eye using a Goldmann lens connected to the laser and carefully affixed to the eye 
3. As soon as the eye is immobile, the laser creates a 2–4 mm small, arched access through the cornea 
4. Inside the cornea, the laser now forms a thin lenticule (= a lens-shaped piece of tissue), which is then removed by the surgeon through the small access point.

Removing the lenticule changes the shape of the cornea and rectifies the visual defect.