Laser Treatment or Trifocals can enhance your active lifestyle beyond belief.
Lasers used in vision correction produce precise pulses of UV light energy which are delivered accurately onto the cornea.
This energy weakens the bonds between atoms in the cornea so that microscopic amounts of tissue are removed in a process called cool ablation.
Since little or no heat is produced, no damage is done to the adjacent tissue allowing the computer guided laser to generate a new corneal profile as it sweeps back and forth across the eye so it more accurately focuses light on the retina for improved vision.
For nearsighted people, the goal is to flatten the cornea; with farsighted people, a steeper cornea is desired. Excimer lasers also can correct astigmatism by smoothing an irregular cornea into a more normal shape.
This reshaping can be done on the front surface of the eye by gently removing a thin layer of cells, a procedure called LASEK. Or by first forming a flap in the cornea, a procedure called LASIK.
In LASIK the flap is carefully repositioned before a bandage lens is placed. It usually takes a few days for your eye to settle and you will need to use eye drops for a few weeks after your treatment.
Every person and every eye is unique and your consultant will be able to provide you with more detailed information about your particular condition.
Lasik surgery animation
What is the Visian ICL?
The Implantable Collamer Lens (ICL) for Nearsightedness is a refractive lens also known as a phakic IOL. “Phakic” meaning that the natural lens of the eye is in place, and “IOL” meaning Intraocular Lens, or a lens inside the eye. The Visian ICL is a posterior chamber implant that is situated through a small incision in the eye behind the iris (the coloured part of the eye), and in front of the natural crystalline lens in order to improve your nearsightedness.
What are Visian ICL’s made of?
The material is called Collamer®, a collagen co-polymer that contains a small amount of purified collagen which is proprietary to STAAR Surgical; the remainder is made of a similar material to that found in soft contact lenses. It is very biocompatible (does not cause a reaction inside the eye) and stable. It also contains an ultraviolet light filter.
What is the Visian ICL intended for?
The Visian ICL is designed for the correction of moderate to high nearsightedness (-3.0 to –15.0 diopters (D)), and the reduction of nearsightedness in patients with up to -20 diopters (D) of nearsightedness. It is indicated for patients who are at least 21 years of age.
In order to be sure that your surgeon will use an Visian ICL with the most adequate power for your eye, your nearsightedness should be stable for at least a year before undergoing eye surgery.
The Visian ICL represents an alternative to other refractive surgeries including LASIK and LASEK or other means to correct sight such as contact lenses and eye glasses.
Who should not have Visian ICL surgery?
Patients who are pregnant and nursing and patients with a narrow angle in the front chamber of their eye, because in this case the space for the Visian ICL would be too small. Patients with cataract
What is the key potential benefit of the Visian ICL?
The key benefit of Visian ICL surgery is the permanent correction or reduction of your nearsightedness allowing you to see clearly at long distances without eyeglasses or contact lenses or reduce your dependence upon them. In addition to the improvement of your uncorrected vision (vision without eyeglasses or contact lenses), your best corrected vision (best vision with contact lenses/eye glasses) may be improved.
LASIK and LASEK permanently remove corneal tissue to deliver vision correction. Unlike ICL implantation, LASIK and LASEK are irreversible procedures.
What are the potential risks of the Visian ICL?
Early complications reported the first week after Visian ICL surgery include:
Visian ICL removal and reinsertion at the time of initial surgery, shallowness of the front chamber of the eye that can create an increase of the pressure into your eye and may necessitate a peripheral iridectomy (a procedure where a small hole is placed in iris (colored part of eye) using a laser called “YAG laser), temporary corneal swelling (edema) and transient inflammation in the eye or iritis.
Complications after 1 week include:
Increase in Astigmatism, loss of best corrected vision, clouding of the Crystalline lens (cataract), loss of cells from the back surface of the cornea responsible for the cornea remaining clear (endothelial cell loss), increase in eye pressure, iris prolapse, cloudy areas on the crystalline lens that may or may not cause visual symptoms (crystalline lens opacities), macular hemorrhage, subretinal hemorrhage, retinal detachment, secondary Visian ICL related surgeries (replacements, repositionings, removals, removals with cataract extraction), too much or too little nearsightedness correction, and additional YAG iridotomy necessary.
The Zeiss trifocal intraocular lens has been developed after many years of research and testing to produce a lens that combines good distance vision with good reading vision as well as good intermediate vision (by which is meant the sight needed to see objects at an arm’s length such as a computer screen or car dashboard). The technique used to implant the lens is the same as that for cataract surgery. One of the advantages of having these lenses implanted is that you never need to worry about the development of cataracts again.
The Zeiss trifocal lens does this by dividing the light that enters the eye. 50% of the light is used for distance vision, 30% for near vision and 20% for intermediate vision, to provide you a solution for seeing at all distances.
Do my eyes need time to adapt?
It is normal that patients with multifocal intraocular lens go through an adaption phase, with vision con-tinuing to improve in the weeks following the procedure. It could take several weeks to realise the full extent of visual correction
Why is time needed for adaption, and what is the process?
Trifocal IOLs project multiple images on the retina, which your brain uses for viewing objects at different distances. The brain must learn to select the visual information it needs to form an image of near, distant or intermediate objects. This adjustment time will vary for each patient.
What about halos and other issues with these lenses?
With all multifocal IOLs, it is normal after surgery to experience some common visual distur-bances. These may be more evident under poor light conditions, such driving at night. Rings of light, commonly called ‘halos’, may appear around street lights or oncoming car headlights. As the brain adapts, these effects will diminish and become less bothersome.
A positive attitude and the awareness that your vision will improve will help you adapt much faster. their very design multifocal lenses reduce contrast sensitivity due to their splitting of light. Contrast sensitivity is the visual perception of the difference in the colour and brightness of the object and other objects within the same field of view. This is why in some low light conditions or when trying to read text on any coloured background some patients can have difficulties. This is the primary reason why patients who have had previous laser corneal surgery or have any other ophthalmic conditions such as glaucoma or diabetic retinal changes are not suitable for trifocal lenses.