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Posters

The effect of peripapillary detachment on retinal nerve fibre layer measurement in high myopia

Poster Details

First Author: R.Kamal Salah SPAIN

Co Author(s):    M.J. Morillo Sánchez   T. Hidalgo Díaz   A.B. Gonzalez Escobar            0   0 0   0 0   0 0   0 0

Abstract Details



Purpose:

Our purpose is to evaluate the effect of the presence of peripapillary neurosensory retinal detachment on retinal nerve fibre layer measurement in high myopia using spectral domain optical coherence tomography.

Setting:

Hospital Virgen de la Victoria of Malaga (Spain)

Methods:

We examined 242 eyes of 130 highly myopic patients. They underwent a complete ocular examination including best corrected visual acuity (BCVA), refraction, biometry and funduscopy. The retinal nerve fibre layer (RNFL) was measured by optical coherence tomography (Cirrus HD OCT) using the optic disk cube 200x200 scan.

Results:

Of the 242 eyes, 20 (8,2%) presented peripapilary neurosensory retinal detachment (PNRD). The mean age was 55,40 +/-9,66 years, the BCVA was 0,40 +/- 0,32. The spherical equivalent was -16,40 +/- 4,80 D. The axial length was 29,96 +/- 1,74 mm. 17 eyes with PNRD presented posterior staphiloma type 1, one eye presented PS type IV and two presented PS type V. The average RNFL thickness of those who presented PNRD was 86,52 +/- 26,20 micras. In highly myopic eyes without PNRD the average RNFL thickness was 73,03 +/- 15,90 micras. There was a significant difference among both groups (p<0,01 Tstudent).

Conclusions:

The peripapilary detachment is not an uncommon finding in highly myopic eyes. When associated to high myopia is described as a yellow-orange lesion inferior to the optic disk. We must differentiate between the retinal pigmentary epithelium detachment and the PNRD. Its pathogenesis and pathologic significance are still not kown. In this study we have observed that eyes with PNRD presented significantly thicker average RNFL thickness than other highly myopic eyes without PNRD. Probably this is a measurement artifact; therefore the results would not be reliable. Further studies are needed to define the pathogenesis and the clinical repercussion that may present.

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