What is a femtosecond laser?
Femtosecond laser technology, a laser that operates in pulses of very short duration of a few femtoseconds (one femtosecond is 10 minus 15 seconds, or 1/1000 trillionth of a second), is the shortest pulse currently available to man under experimental conditions, and it can be focused to a region of space smaller than the diameter of a hair for microfabrication. Nowadays, femtosecond laser technology is commonly used to cut high explosives and to perform gene therapy on individual cells. In laser refractive surgery, the use of femtosecond laser can precisely open the molecular chain of eye tissues to create a more uniform and perfect corneal flap. Femtosecond laser is known as the flagship technology of LASIK and has been hailed as another revolution in refractive surgery after wavefront aberration technology. Patients who are suitable for laser myopia correction can receive femtosecond laser surgery.
Hunan Provincial People’s Hospital Optometry Center has reintroduced the world’s most advanced German Eagle Vision FS200 femtosecond laser + EX500 excimer laser refractive surgery platform, which is the fastest and most complete refractive myopia surgery system in the world. The clinical application of this system has greatly improved the safety and post-operative visual quality of myopia surgery.
Six advantages of Eagle Vision FS200 femtosecond
One, the whole process does not move the knife
Eagle Vision FS200 Femtosecond is blade-free, which reduces shock waves and reduces the likelihood of corneal injury.
Two, personalized flap making
According to the needs of the surgery, personalized corneal flap is made.
Safety and comfort
Flap making is faster and the advanced negative pressure suction technology ensures safe flap making.
Four, more accurate positioning
Automatic detection before each treatment ensures precise cutting, and the center position is adjustable intraoperatively to prevent eccentricity.
V. Wide range of applications
It is not limited by corneal size, shape and thickness, and can be used to make personalized corneal flaps of different shapes and thicknesses, as well as for corneal stromal ring and corneal transplantation surgery.
Sixth, the effect is more perfect
Eagle Vision Femtosecond can “tailor-made” personalized cutting program, using multi-dimensional technology to “simulate surgery”, you can know the post-operative effect before surgery, the post-operative visual effect is better.
Comparison Items
Eagle Vision Femtosecond Laser Flap Making
Traditional flap making with a conventional corneal knife
Cutting accuracy
High, 100 times higher than keratome, deviation less than 5%
Deviation in the range of 19%-31%
Safety
High
Relatively low
Corneal flap complications
Very few, almost none
Relatively high
Corneal flap incision angle
Can be designed at any angle or shape
Only one angle
Corneal flap
Uniform thickness and smooth stromal surface
Relatively rough
Adaptation range
wider. The flap is thin and can reduce refractive error by 2D. Can be used for corneal transplantation and corneal incision before corneal stromal ring implantation
Narrower, only suitable for corneal flap making in Lasik surgery