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Programação » Sessão de Encontro com Autor

Código: P 024
Apresentação: Pôster
Área Técnica: Córnea
Categoria / Classificação: Oftalmologia Cirúrgica
Região onde foi realizada a pesquisa: Centro-Oeste

INSTITUIÇÃO ONDE FOI REALIZADO O TRABALHO:

CONEP:

AUTOR PRINCIPAL:

CO-AUTOR(ES):

TÍTULO:
INTRASTROMAL CORNEAL RING SEGMENT IMPLANTATION FOR ECTASIA AFTER REFRACTIVE SURGERY

OBJETIVO:
To evaluate the clinical outcomes of intrastromal corneal ring segment (ICRS) implantation to correct keratoconus on eyes with prior refractive surgery.

MÉTODO:
41 eyes of 25 patients, with ectasia after refractive surgery (PRK or LASIK) were studied in a nonrandomized, retrospective, observational case series. Corneal tunnels were created by means of mechanical dissection in all eyes. Main outcome measures included UCVA, BCVA, refraction, keratometry and computerized analysis of corneal topography.All surgeries were performed by the same surgeon between March 2005 and October 2013.

RESULTADOS:
41 eyes of 25 patients, 13 men and 12 women, with postoperative keratectasia after PRK (8 eyes, Group A) and LASIK (33 eyes, Group B) were evaluated. Average age at the time of surgery was 28.66 (± 5,65) years. Mean follow-up was 3 years. A single segment was implanted in 14 eyes (34.1%) and double segments were implanted in 27 eyes (65.9%) according to the nomogram. The mean corneal astigmatism decreased from -4.36 diopters (D) preoperatively to -1.66 D postoperatively (P = 2.85x10-8).The mean spherical equivalent decreased from -3.24 D to -2,34 (P= .0033). The mean refractive astigmatism decreased from -2.93 D to -1.59 (P = 1.69x10-5). The mean keratometry decreased from 46.88 D to 45.53 D, respectively; the decrease was statistically significant (P= 4.19x10-11). The decrease in mean corneal astigmatism was statistically significant (P = .000). There was a statistically significant reduction in keratometric values from preoperative to the last follow-up examination (P =.000)

CONCLUSÕES:
ICRS implantation is a useful option for the treatment of ectasia following refractive surgery. It resulted in a significant reduction of refractive cylinder and increase of BSCVA.

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