Topographic corneal changes in astigmatism due to pterygium’s limbal-conjunctival autograft sur

• Autores: P. Pujol Vives, A. de Carvalho Mendes, Gemma Julio Morá, Sara Lluch Margarit, María Dolores Merindano Encina, Imma Sola Garcia
• Localización: Journal of Emmetropia: Journal of Cataract, Refractive and Corneal Surgery, ISSN-e 2171-4703, Vol. 4, Nº. 1, 2013, págs. 13-18
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • PURPOSE: To evaluate the effect of pterygium size and excision with limbal-conjunctival autograft on corneal astigmatism before, and one month and three months after surgery.

    SETTING: Consorci Sanitari de Terrassa. Terrassa, Barcelona, Spain.

    METHODS: This is a descriptive, longitudinal, prospective, non-randomised study of 32 eyes in 32 patients with pterygium, and operated using the limbal-conjunctival autograft technique in our hospital in the year 2011. Standardised photographs were taken and corneal topography was performed preoperatively, one month, and 3 months after the intervention. The variables studied were length of pterygium invasion of the cornea, central corneal astigmatism and axis.

    RESULTS: Mean pterygium length was 2 ± 0.6 mm. Mean preoperative astigmatism was 1.8 ± 1.35 dioptres, 1.15 ± 0.9 dioptres at one month and 1 ± 0.46 dioptre three months after the intervention. A statistically significant correlation (p < 0.05) was obtained between pterygium length and preoperative astigmatism, but no correlation was observed between length and astigmatism at one month and at 3 months post-intervention. A statistically significant reduction was found between pre-surgical astigmatism and astigmatism at one month and at three months, although no differences were observed between one month and 3 months. No statistically significant differences were found when comparing the presurgical astigmatism axis, powered by Editorial Manager® and Preprint Manager® from Aries Systems Corporation (93.5 ± 27) with the axis at one month (85.9 ± 35) and three months (84 ± 33 degrees) post-intervention.

    CONCLUSIONS: Pterygium surgery with limbal-conjunctival autograft moderately reduces corneal astigmatism and preoperative astigmatism is associated with the size of the pterygium.