The Vidaurri Fluid Retention Ring is a stainless steel vacuum cylinder that is designed to attach to the patient cornea to hold fluids for photorefractive keratectomy (PRK), corneal cross-linking, or any other procedure that requires a fluid to be constrained locally on the cornea. It is 8.7mm in diameter and attaches to a vacuum syringe.

Vidaurri Fluid Retention Ring is comprised of 3 pieces:
- A spring-loaded syringe with silicone tubing that is 15 inches (38cm) long connected by a Luer-Lok hub.
- A stainless steel vacuum ring that is attached to the silicone tubing.
- A plastic alignment cylinder with crosshairs used for centering the vacuum ring.


Sizes
The Vidauuri Fluid Retenton Ring comes in one size ? 8.7mm in diameter.
The Retention Ring is available only from Katena Products as their product number K20-2135. Contact Katena Products to order the Vidaurri Fluid Retention Ring.