The unique properties of ultrashort pulse lasers that make them effective for micro-machining are also highly useful for performing complex or delicate surgical procedures. FCPA lasers allow precise removal of tissue with little or no damage to the surrounding areas. One of the most established uses of femtosecond lasers for tissue modification is LASIK (Laser-Assisted In Situ Keratomileusis). The precision and minimal damage achievable with FCPA lasers are ideal for cutting the delicate transparent cornea of the eye.
Although LASIK has been practiced for many years, the new SMILE procedure has been successfully developed and implemented in the field. Other types of vision correction, such as cataract surgery, have gained acceptance. Another possibility for femtosecond lasers, in general, is reducing presbyopia, by softening the lens stiffness that develops with age.