VISX® STAR S4 IR Excimer Laser System
The VISX® STAR S4 IR excimer laser system is a unique laser platform developed in conjunction with the original dependability and performance of VISX® technology.
Your individual eye information is first programmed into a computer which controls the laser. The laser then produces a series of rapid pulses that remove specific amounts of corneal tissue. This laser emits a beam of cool ultraviolet light that does not penetrate into the eye. Hence, inner parts like the iris, lens and retina are unaffected by therapy.
This system is able to offer you precise, custom corrections through several distinct features:
- Iris registration technology
- Active eye-tracking
- Automatic centering to the pupil
- Variable laser beam size
- Variable repetition rate of treatment
The iris registration technology used here is the first FDA-registered, fully-automated, non-contact means of aligning the cornea to the laser treatment. Iris registration improves the outcome of treatment by taking into account that each person's iris is as unique as a fingerprint. This technology is able to match the laser treatment with the appropriate corneal site through the identification of multiple reference points on your iris. The human eyeball rotates ever so slightly when changing from an upright position to lying down and vice versa. This rotation is recognized with VISX® technology and re-registration can be carried out automatically to align the treatment in spite of this rotation.
The human eye is capable of numerous involuntary movements and these will occur during the LASIK procedure. The STAR S4 uses infrared cameras incorporated into an eye-tracking system developed by ActiveTrak®. The cameras capture information from all three dimensions of eye movement that may occur throughout the procedure. This is analyzed so that the precision of the laser correction for your treatment is enhanced.
The ActiveTrak® system also automatically locates, and adjusts for changes in the pupil center regardless of pupil size so that treatment is centered without the need to expand the pupil.
The ability of the laser beam to change in size through a range of 0.65mm to 6.5mm over the treatment area allows for faster correction along with less unnecessary tissue removal. This is capable of allowing more precise therapy and faster healing.
The dynamic beam size is complemented by a variable repetition rate of treatment so that your time in treatment is optimized.
