
	Femto-LASIK Live (real-time movie)

	Animation: Microkeratome versus femtosecond laser

The Femto-LASIK (Laser LASIK) Procedure

The femtosecond laser eliminates the need to use a blade at all. The computer-controlled laser technology works by delivering rapid pulses of light, a quadrillionth of a second each, to a pre-programmed depth and position within the cornea.

Step 1: Preparation of the corneal flap with the femtosecond laser

		The LASIK surgeon uses computer software to guide the laser beam. The surgeon can define the diameter and depth of the flap precisely.
		The femtosecond laser uses a low vacuum suction ring to hold the eye. Microkeratomes require a higher vacuum suction ring.
		The laser inserts a series of tiny (3-micron-diameter) bubbles within the central layer of the cornea. As the femtosecond laser moves back and forth across the eye, the bubbles are connected so they form a corneal flap. Details \| View animation
		The surgeon can follow the progress through the operating microscope and on a special monitor. A small section of tissue at one edge of the flap is left uncut, forming a hinge that allows the surgeon to fold back the flap so that the cornea can be accessed and reshaped for vision correction. After the flap is finished, the doctor gently lifts the flap.

Step 2: Vision correction with the excimer laser

		Now, the excimer laser is used to reshape the cornea in order to correct the refractive error. Click here for details about the ablation profiles for nearsightedness, farsightedness and astigmatism. Ablation profiles for nearsightedness, farsightedness and astigmatism.

		Finally, the corneal flap is replaced and functions as a natural band aid.