XEN Gel Stent for glaucoma


Vista Alpina 

Eye Center

Bahnhofplatz 1a
3930 Visp

Phone 027 946 70 00

Fax 027 946 70 03

Send an e-mail



Monday - Friday:

8am - 12pm

1pm - 7.30pm

(On Tuesdays, Wednesdays and

Fridays until 6pm)

On Saturdays:

8am - 12pm


by phone


Vista Alpina

Eye Center

Rue du Bourg 3
3960 Sierre

Phone 027 455 34 04

Fax 027 455 34 77

Send an e-mail



Monday, Wednesday, Friday:

8am - 12pm

12.30pm - 5pm

(Monday 12.45pm)


7am - 12pm

12.45pm - 7pm


8am - 12pm

12.45pm - 5.30pm

Saturday: closed


by phone


Augenzentrum Vista Alpina AG and the services provided by Augenzentrum Vista Alpina are not legally or otherwise affiliated with Vista Klinik AG, Laser Vista AG, Vista Klinik Net AG or Vista Diagnostics AG.

Glaucoma, Vista Alpina Eye Center Valais

The XEN Gel Stent implant is a new, minimally invasive surgical technique for many forms of glaucoma.


The Collamer implant is only 6 millimetres long and thinner than a human hair. It is made of collagen, which is biocompatible and very well tolerated. It functions as a minute tube, which can reduce pressure in the eye by up to 50% by draining excess fluid away. 


The XEN Gel Stent is so small that it:

  • can be inserted without sutures

  • is not visible from the outside

  • is not noticed by the patient.

When can the implant be used?

The XEN Gel Stent implant is suitable if, for example,


  • You cannot tolerate drops that are used to lower your eye pressure

  • Treatment with drops doesn’t reduce your eye pressure enough, or your eye pressure fluctuates too much even if you use the drops 

  • Your lifestyle makes it difficult for you to use eye drops regularly

  • The depth of the anterior chamber of the eye is not sufficient

Dr. med. Kristof Vandkerckhove interviewed by Isabel Walker, british journalist, about the XEN gel stent

Advantages of the XEN Gel Stent implant:

  • Significant and sustained reduction of intraocular pressure

  • No longer necessary to use eye drops

  • The surgical procedure is minor and very brief

  • Stable implant that stays permanently in place

  • Surgery and healing are usually painless

  • Stents can be replaced if necessary

  • Further surgery of the affected eye is still possible

  • Insertion is possible even if glaucoma surgery has already been carried out

Possible risks and complications:

  • The procedure is usually free of complications

  • Cysts may form in very rare cases, resulting in brief follow-up medication as an outpatient

  • Strict compliance with intensive use of eye drops for four weeks after the intervention is essential in order to ensure straightforward healing.

  • No serious complications that would lead to loss of vision have occurred so far.

Glaucoma, Vista Alpina Eye Center Valais

Implantation & function of the XEN Gel Stent

After a very small 2 mm incision in the cornea, the implant is inserted with a disposable injector into the subconjunctival space, where it remains permanently. The injector is withdrawn and the incision seals up by itself. The procedure takes place on an outpatient basis with local anaesthetic and moderate sedation, and lasts about 15 minutes. Follow-up appointments are made after the intervention in order to monitor the healing process. The stent implant connects the anterior chamber with the subconjunctival space, so that fluid can flow from the anterior chamber of the eye into the veins of the conjunctiva, from where it is carried away into the body.

If you suffer from glaucoma and would like to know if the XEN Gel Stent is suitable for you 

Phone us at 027 946 70 00 to arrange an appointment for a consultation. We would be happy to advise you in detail about the costs (and options for reimbursement), and to see whether the XEN Gel Stent is a real alternative for you, based on thorough preliminary examinations and suitability tests.

SIWF-ISFM certificate ophthalmo surgery Vista Alpina Eye Center
Hospital certificate Vista Alpina Eye Center

Tags: Eye clinic, eye centre, ophthalmologist, cataract, glaucoma, premium lenses, contact lenses, laser surgery, Dr. Vandekerckhove, Vista Alpina, Visp, Siders, Sierre, Brig, strabismus treatment, macular degeneration, Upper Valais, Valais, Bernese Oberland, Thun, Spiez, Switzerland, eye surgery, eye surgeries, seeing without glasses, orthoptics, retina consultation, retina surgery, eyelid surgery, refractive surgery, intravitreal treatment, defective vision, presbyopia, eye diseases, implantable contact lens