LASIK - Risks

Professional associations such as the BVA (Professional Association of Eye Specialists) and the DOG (German Ophthamological Society) have scientifically recognised LASIK as a correction procedure up to -10 dpt.¹³ However, there are naturally a number of risks.
In rare cases, corneal under- and overcorrections can occur. In such cases, secondary treatment can be perfomed after three months. Normally, the corneal lobule and the epithelial layer can be re-opened and the correction can be performed.

In very rare cases, flap displacement or misfolding (keratectasia) can occur. With early recognition, the corneal layer can be repositioned and stabilised with a contact lens.
Some patients experience a growth of small protective cells in the space between the flap and the cornea; however, this complication, with early recognition, can be addressed by opening the flap and removing the cells.¹⁴

Further possible postoperative consequences are a reduction in twilight and nighttime visibility (due to limited contrast sensitivity), glare effects, and halogons (diffuse, ring-shaped phosphenes or so-called "light halos").¹⁵

Serious complications such as bleeding and infections cannot be ruled out, but are extremely rare.
Your doctor will be happy to explain any further risks as well as your personal risk situation.

Sources:
¹ DocWiki
^{2, 3, 9, 12} Eye Clinic of Neumarkt, Cologne 
⁴ German Professional Association of Eye Specialists e.V.
^{5, 6, 10, 11, 13, 14, 15} Commission for Refractive Surgery (KRC)
^{7, 8} Charité