Femtosecond Lenticule Extraction (FLEx)

FEMTOSECOND LENTICULE EXTRACTION (FLEX)

Femtosecond Lenticule Extraction, also known as FLEx, is an advanced laser vision correction procedure that treats refractive errors such as nearsightedness and astigmatism. It uses a femtosecond laser to create a precise lens-shaped tissue layer inside the cornea, called a lenticule, which the surgeon removes through a small corneal flap. As a result, the corneal shape changes and vision improves.

WHAT THIS PROCEDURE DOES

FLEx reshapes the cornea to improve how light focuses on the retina. First, the femtosecond laser forms a thin flap and a customized lenticule within the corneal tissue. Next, the surgeon lifts the flap and removes the lenticule. Therefore, the cornea becomes flatter or more regular, depending on the correction needed. This change reduces dependence on glasses or contact lenses.

WHO MAY BENEFIT

This procedure may help adults with stable refractive error who seek surgical vision correction. For example, it can treat selected cases of myopia and myopic astigmatism. Suitable candidates usually meet safety criteria based on corneal thickness, shape, and overall eye health. Consequently, a detailed screening evaluation is required before approval.

1. Adults with stable eyeglass grade
2. Myopia and myopic astigmatism cases
3. Patients seeking laser vision correction
4. Those with adequate corneal thickness
5. Individuals who pass corneal mapping screening

HOW THE PROCEDURE IS PERFORMED

The treatment is performed using a femtosecond laser platform. First, anesthetic eye drops are applied. Then, the laser creates the flap and lenticule with high precision. After that, the surgeon removes the lenticule to achieve the planned correction. The procedure usually takes only minutes per eye. Moreover, most patients go home shortly after treatment.

RECOVERY AND EXPECTED RESULTS

Vision often improves within days, although early fluctuations may occur. Patients commonly return to routine activities quickly, with guided restrictions. In addition, follow-up visits help monitor healing and visual stability. Final visual outcomes depend on preoperative measurements and proper healing response.

SAFETY AND CLINICAL CONSIDERATIONS

FLEx uses bladeless femtosecond laser technology and follows established refractive surgery principles. However, all surgery carries risk. Possible effects include dry eye symptoms, glare, halos, undercorrection, or overcorrection. Therefore, comprehensive screening and informed physician guidance remain essential.