Intra Ocular Rings

At the end of the eighties medics in the USA began to realise that the middle section of a contact lens didn't have much of a function. They thought a ring would work just as well. 

They have come up with this technique:

Through a tiny incision in the cornea a small tunnel is created on both sides. After that a little ring is pushed into each tunnel. The incision is closed with a tiny stitch.

In case of any problems the rings can be removed. We now know that once the rings have been removed the eye returns to its original condition..

Advantages:

• No tissue removal
• The ring can be easily removed
• The rings are not in the middle of the cornea

• Only usable in -1,0 to -4,0
• High eye pressure is required when placing the rings. This can lead to bleeding of the retina
• If the rings aren't precisely placed the effect is not as good. A slight difference between the left and right eye will cause disrupted images
• Common complications are: night vision problems, infection, perforation, wound infiltrations, epithelium erosions and scarring
• The placement of the rings is complicated