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Full-ring intracorneal implantation in corneas with pellucid marginal degeneration

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Session Details

Session Title: Presented Poster Session: Cornea - Surgical

Session Date/Time: Saturday 05/09/2015 | 15:00-16:30

Paper Time: 15:00

Venue: Poster Village: Pod 4

First Author: : S.Mojaled Nobari SPAIN

Co Author(s): :    C. Villena   K. Jadidi           

Abstract Details


To report the visual and refractive outcomes in corneas with pellucid marginal degeneration following MyoRing implantation (DIOPTEX GmbH).


All operations took place at Bina Eye Hospital, Tehran, Iran.


This study included 15 eyes of 15 patients, ranging in age from 22 to 49 years old, with pellucid marginal degeneration. An intrastromal corneal ring (MyoRing) was inserted by means of mechanical dissection using the the PocketMaker microkeratome. The main outcome measures were uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction, and keratometry readings. The mean postoperative follow-up was 10 months (range 6-12 months).


The mean UDVA (LogMAR) improved significantly from 1.13 ± 0.21 preoperatively to 0.24 ± 0.13 postoperatively (p<0.001) and the mean CDVA (LogMAR) improved significantly from 0.39 ± 0.12 to 0.19 ± 0.09 (p< 0.001). The mean cylinder of manifest refraction decreased significantly by 4.00 diopter (p< 0.001). The mean spherical equivalent error (SE) decreased significantly from -6.00 ± 3.60 D to -0.70 ± 1.90 D at the end of the follow-up period. Furthermore, with regards to corneal topography, a significant reduction was observed in keratometric values. Kmax, Kmin, and Kaverage decreased significantly by 5.00, 1.10, and 4.00 D, respectively (p<0.001)


MyoRing implantation using the PocketMaker microkeratome appears to provide an effective method for treating pellucid marginal degeneration. Both UDVA and CDVA improved significantly. The corneal steepening and astigmatism reduced in all subjects after MyoRing implantation.

Financial Interest:


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