What is a Verisyse lens?
Verisyse intraocular lenses (also distributed under the name Artisan) are phakic lenses, meaning that the crystalline lens is not removed during the surgery. They are implanted in the anterior chamber of the eyeball (between the cornea and the iris), in such a way that they are attached to the iris to prevent them from moving and correct the patient’s refractive defect.
Who are Verisyse lenses for?
These lenses are designed for patients with myopia of between -5.0 and -20.0 dioptres and with up to -2.5 dioptres of astigmatism. The patient’s prescription must have remained stable for over six months. In most cases, the ideal candidates are those who are keen to correct their refractive defect and are not affected by presbyopia or cataracts. Also, for high prescriptions, LASIK treatment is usually not recommended, and the Verisyse lens offers a good alternative to refractive laser treatment. Candidates for this surgery will be able to definitively do without spectacles. People who have been operated on previously with another type of surgery may not be suitable candidates for a Verisyse lens implant. The main contraindications when deciding whether or not to perform this surgery are as follows:
- Congenital bilateral cataracts
- Recurrent eye inflammation
- History of eye conditions
- History of retinal detachment
- Having only one eye with good potential vision
- Glaucoma not controlled with medication
- Corneal problems
If you suffer any of these conditions, make sure to tell your ophthalmologist in confidence.
What is the design of the Verisyse lens like?
The Verisyse lens has the following characteristics:
- Iridium fixation, designed for the anterior chamber
- Long-term positional stability
- Large distance between the lens and the endothelium (innermost corneal layer)
- No inhibition of pupil dilation
- Limitation of the risk of cataracts
- Focused on the optical axis
There are two versions of this design of lens, the rigid model (Verisyse/Artisan) and the flexible model (Veriflex/Artiflex).
The Verisyse lens is manufactured in two different optical diameters: 5 or 6 mm. It is fixed to the anterior peripheral part of the eye via two iridoplastic bridges with a locking mechanism. The material used is Polymethyl methacrylate (PMMA), a rigid plastic. Due to this fact, the incision which has to be made in the cornea to insert the lens must be 6 mm in size for it to be implanted without any problems. As a result, a stitch is needed for the cornea to heal correctly.
The Veriflex lens is manufactured with a flexible optic composed of a material called Polysiloxane. In contrast, the haptics remain rigid, and are made from Polymethyl methacrylate (PMMA). The optical diameters are also 5 and 6 mm. Thanks to this advance, implantation of the lens can be done through a smaller incision of 3.2 mm. With this procedure no stitches are required and the recovery time is also shorter.
For both cases, a full ophthalmological study is carried out, which is both refractive and on eye health, to calculate the exact power of the lens.
What does surgery with the Verisyse lens involve?
Firstly, the surgeon must perform an iridotomy with a YAG laser. An opening is created on the external margin of the iris so that the aqueous humour can circulate naturally inside the eyeball and thereby avoid a potential increase in intraocular pressure (IOP) after surgery. This is a quick and painless procedure which is generally performed a few days before surgery, but which can also be done on the same day if the surgeon considers it appropriate.
The implant of the Verisyse lens takes approximately 10 minutes in the hands of an experienced surgeon. A local anaesthetic is administered first. Corneal incisions are then made to enable the surgeon to work inside the eye. The lens is implanted and anchored to the iris thanks to special instruments.
If a rigid version has been chosen, a corneal suture is performed to help the wound to heal. Finally, on some occasions an eye patch is applied which must be worn until the next visit.
The patient may return home shortly after the operation, but they are advised to be accompanied by a trusted acquaintance as it is not recommended to drive or travel alone.
Both the review on the day after surgery and subsequent reviews over the following months are of vital importance to monitor the stability of the implant and to avoid potential complications. Please remember to attend all appointments scheduled by your ophthalmologist.
What are the advantages and disadvantages?
As the Verisyse lens is positioned in the anterior chamber of the eye, it can be detected at any time due to the transparency of the cornea. This is not a factor to take into account as it is barely noticeable, and could only be seen by someone looking closely and intently.
The visual results obtained with Verisyse lenses are highly satisfactory and stable. Visual recovery is quick, no stitches are needed when the most modern version of the lens is used, they are highly predictable and excellent visual quality is achieved. They are designed to avoid interfering with the eye’s other structures and for this reason the risk of developing cataracts or affecting the endothelium (innermost corneal layer) is minimal. As no part of the eye’s structure is permanently modified, they can be removed if necessary during an equally simple procedure as that used to implant them. This means that the lens can be replaced by a new one at any time, or a different operation can be considered, such as refractive lens surgery.
In short, it is the ideal solution for people who would like to do without spectacles and achieve optimum visual quality.