Laser / LASIK / Refractive Surgery
VISX™ STAR S4 IR™ Excimer Laser
The STAR S4 IR excimer laser is a refractive excimer laser system that uses precise pulses of ultraviolet light to remove corneal tissue from the eye during wavefront-guided LASIK vision correction surgery. Approved by the FDA, the device has an eyetracker to detect the position of the eye, aligning it with the cornea, a diagnostic wavefront sensor and an automated iris registration system.
Using information gathered from each patient’s eyes, the VISX laser is able to correct the very specific refractive errors of each patient in order to achieve the best post-operative vision quality possible. This procedure can be performed on patients who are nearsighted, farsighted and/or astigmatic.
Features Of The VISX STAR S4 IR Excimer Laser
Combined with the VISX Wavefront technology, the STAR S4 laser is one of the most advanced laser technology platforms available today. The key features that help provide safe and sharp vision correction results include:
- Iris Registration (IR) – An FDA-approved technology that allows for the most precise alignment and delivery of laser energy due to prominent reference points of each patient’s iris.
- Variable Spot Scanning (VSS) – Laser beams ranging from 0.65mm to 6.5mm allow patients to receive correction completely customized for their individual refractive errors.
- Variable Repetition Rate (VRR) – delivers treatment at repetition rates that vary.
- Active Trak™ 3-D Eye Tracking – This feature monitors three-dimensional movements of the eye during treatment to ensure continuous delivery of the most precise laser correction, with no need to dilate the eye.
- Active Trak™Automatic Centering – Automatically locates the pupil and keeps the laser focused directly over its center.
Advantages Of The VISX STAR S4 IR Excimer Laser
Treatment with the VISX laser is often shorter than other LASIK procedures, and involves reduced post-operative pain and faster healing times. Vision correction is performed using only anesthetic eye drops, with no need for eye dilation. Patients can return home shortly after their procedure and will likely be asked to come in for a follow-up visit the next day.
LASIK After Cataract Surgery
Patients who undergo cataract surgery may experience refractive errors after the procedure. These refractive errors may include:
- Nearsightedness, or myopia
- Farsightedness, or hyperopia
These errors are typically not due to a problem with the new implanted lens, but are instead caused by irregularities in the cornea. Post-cataract surgery patients have the option of undergoing LASIK vision correction to eliminate the need to wear glasses. LASIK is able to reshape the cornea so the eye is able to focus light sharply. LASIK will not affect the results of a patients’ previous cataract surgery.
Refractive Lens Exchange
Refractive lens exchange (RLE), also known as clear lens extraction, or CLE, is a surgical procedure for vision correction that replaces the natural lens of the eye with an intraocular lens, or IOL. Using the same surgical techniques as cataract surgery, the clear lens of the eye is removed and replaced with an IOL to change the focusing power of the eye.
An alternative to laser vision correction, the RLE procedure avoids the need for a corneal modification that is used during the LASIK procedure, and instead uses the same procedures performed in cataract surgery.
Patients who choose to undergo refractive lens exchange have several options when it comes to the type of IOL that will be implanted into the eye. The RLE procedure uses the same IOLs used in cataract surgery and is able to treat all types of visual disorders, including farsightedness, nearsightedness, presbyopia and astigmatism. Patients are provided with a choice of the most advanced premium IOLs which will allow them to see clearly at all distances.
Candidates For Refractive Lens Exchange
Refractive lens exchange is ideal for patients who:
- Want to reduce or eliminate their dependence on glasses or contact lenses
- Are between the ages of 45 and 75 years of age
- Have high myopia, or nearsightedness, high hyperopia, or farsightedness, presbyopia or astigmatism, with or without cataracts
- Have early symptoms of cataracts
- Are poor candidates for LASIK or PRK
- Have no health issues that affect the eyes
Patients with astigmatism can undergo additional correction during their procedure through relaxing incisions in the outer margins of the cornea, known as Limbal Relaxing Incisions. These incisions create a symmetrical cornea and help reduce or even eliminate astigmatism in the eye. There are also IOLs that correct astigmatism to allow these patients to see clearly.
Benefits Of A Refractive Lens Exchange
A refractive lens exchange is an alternative to those patients with corneas that are too thin for a laser vision correction procedure.
Some of the advantages of RLE include the following:
- The rapid recovery of vision
- The cornea remains untouched
- There is no need for cataract surgery in the future
- Vision is now stable
- Correction of presbyopia at the same time
- The IOL can be exchanged
The Refractive Lens Exchange Procedure
The refractive lens exchange procedure is performed on an outpatient basis using the same techniques as those for cataract surgery.
A topical or local anesthesia is applied to the eyes to minimize discomfort during the procedure. Through a tiny incision of 3mm or less, the natural lens of the eye is removed and replaced with an IOL that is inserted through the same opening. Once inserted, the lens is unfolded and moved into its permanent position in the eye. There are no stitches needed as the incision will be able to seal on its own. The refractive lens exchange procedure takes just 20 minutes to perform and offers patients significant and immediate results.
After The Refractive Lens Exchange Procedure
After a refractive lens exchange, patients can return home the same day, and can return to work and other regular activities after a day or two. Many report immediate improvements to their vision, and vision will continue to improve as the brain adapts to the new lens. Once vision has stabilized, it will likely stay the same over time as the lenses correct vision and prevent the patient from developing cataracts in the future. The second eye is usually treated a few weeks after the first procedure.
The extent of the results of the RLE will depend upon the patients eyes, lifestyle and the IOL selected for the procedure. Many patients are able to eliminate their dependence on glasses or contacts after this procedure, while others may still need glasses for driving or reading.
Risks And Complications Of A Refractive Lens Exchange
All surgery carries some degree of risk. These concerns should be discussed, in detail, with the surgeon.
The risks and complications of a refractive lens exchange are the same as those of cataract surgery and may include:
- Retinal detachment
- Increased pressure in the eye
- Sensitivity to light
- Dry eyes
- Distortion in vision