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       XXVI Annual Congress of the Iranian Society of Ophthalmology        بـیــست و ششمین کنــگــره سـالیـانه انـجـمـن چـشـم پـزشـکی ایـــران
مقاله Abstract


Title: Photorefractive Keratectomy after Myoring Implantation in Patients with Keratoconus.
Author(s): Mahmoud Jabbarvand, Mehdi Khodaparast, Hesam Hashemian, Alireza Mahmoudi
Presentation Type: Oral
Subject: Cornea and Anterior Segment
Others:
Presenting Author:
Name: Hesam Hashemian
Affiliation :(optional) Farabi Eye Hospital
E mail: shhlucky@yahoo.com
Phone:
Mobile: 09126805097
Purpose:

To evaluate outcomes of Photorefractive keratectomy after MyoRing implantation in Patients with Keratoconus.

Methods:

This interventional case series study comprised 16 consecutive keratoconic eyes. Patients with moderate keratoconus who had previous Myoring implantation with the femtosecond laser, at least six months ago, were included in this study. All patients had a baseline (pre PRK-CXL) corrected distance visual acuity 0f 20/63 or better, contact lens intolerance and stable refraction. Patients with maximum required ablation > 50 µm with optical zone ≥ 5.8mm according to mesopic pupil size, the residual corneal thickness < 400µm were excluded from this study. All patients underwent photorefractive keratectomy. The patients were evaluated during one year follow up period.

Results:

Sixteen eye from 16 consecutive patients were reviewed .The mean age was 29.9 ± 3.3. MyoRing implantation resulted in significantly improvement in UDVA and CDVA at last follow-up. Significant improvement in UDVA was noted before PRK to after treatment (P <0.001) which was not seen in CDVA (Pvalue=0.066) Significant improvement in spherical part of refraction after MyoRing implantation was observed which was not seen in cylindrical part. There was no significant change from base line (pre MyoRing) to after treatment (post MyoRing and post PRK) in the mean of coma, HOAs, CH and CRF. The Kmax and meanK were significantly reduced after Myoring implantation and additional decrease was noted 6 months after PRK without significant change in 12months postoperatively.

Conclusion:

Photorefractive keratectomy after MyoRing implantation is an acceptable measure for keratoconic patients.

Attachment:





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