Medical & Surgical Ophthalmology

Intrastromal rings

What are intrastromal rings?

Intrastromal rings are methacrylate rings that are placed in the cornea in order to regularize its surface and stop the evolution of keratoconus.

In which cases is it done?

Intrastromal rings are used in keratoconus that can no longer be treated with contact lenses and whose thickness is sufficient to implant the rings.

Previous exams

A complete ophthalmological examination is necessary prior to surgery, including a corneal topography.


The patient may still have a few diopters of astigmatism that can be corrected later with lasik surgery.

Sensation of a foreign body in the eye that will disappear over time. Most of them can lead a normal life from the first day.

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Active clinical trials

Dry eye

Duration: 6 weeks
Treatment: drops

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