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KeraRing intrastromal rings for astigmatism correction after keratoplasty

Poster Details

First Author: F.Pastor Pascual SPAIN

Co Author(s):    C. Peris Martinez   E. Fernandez Lopez   A. Fandiño        

Abstract Details


Evaluate changes in visual acuity, refraction and keratometry in patients with keratoplasty and 5-milimeter intrastromal corneal rings (Keraring) six months after the surgery.


Fundación Oftalmológica del Mediterráneo, Valencia Spain


In a prospective non comparative interventional case series, outcomes in 8 eyes, with astigmatism after keratoplasty were analyzed 6 months after the implantation of the Keraring instrastromal ring using femtosecond technology (IntraLase 60 KHz). They comprised uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction, slit lamp examination, and corneal topography.


The mean UCVA and BCVA after Keraring implantation were 0.12ḟ0.05 and 0.45ḟ0.22, respectively. The BCVA after instrastromal corneal ring implantation was statistically significantly better than the BCVA before surgery (P<0.05). There was a reduction in the cylinder and the sphere after the surgery. There was a reduction statistically significant in the keratometry after the surgery statistical in the steepest K and in flat K. No complications were observed during the surgery and after the surgery.


The Keraring intrastromal 5 milimeter corneal ring were a safe, and effective, procedure for the correction of corneal astigmatism after keratoplasty in order to achieve a good visual rehabilitation. It doesn’t affect visual axis. It is also a reversible procedure

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