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Lucy Longeron, Fanny Billaud, Olivier Lebreton, Michel Weber; Microperimetry Analysis In The High Myopia: Results And Correlation With Choroidal And Retinal Thicknesses. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4438.
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The notion of chorioretinal thinning in high myopia has been clearly demonstrated. The aim of our study was to assess the functional impairment in patients with high myopia , by measuring the visual acuity and by analysing the microperimetry
Prospective study of 20 patients over 50 years divided into 2 groups: 10 high myopic patients with axial length> 28 mm and a control group of 10 patients with axial length <26 mm.Each patient had an ophthalmologic examination including ETDRS visual acuity, choroidal and retinal thickness measurements by SD-OCT and a microperimetry
Myopic group (mean axial length of 30.5 mm): mean ETDRS score of 76, mean choroidal macular thickness of 103.6 micronsControl group (mean axial length of 24.7 mm): mean ETDRS score of 85, mean choroidal macular thickness of 211.2 micronsThere is a significant decrease in retinal sensitivity thresholds in high myopia.There was a significant correlation between the choroidal thickness of the central 2000μm and the total retinal thickness (Rm = 0.64, p <0.05) and the outer retinal thickness (Rm = 0.45, p <0.05)However, no correlation was found between choroidal and retinal thicknesses and retinal sensitivity level and between visual acuity and these two thicknesses.
In high myopic patients without any associated eye disease, visual acuity may be optimal whatever the choroidal thickness but low visual acuity is associated with EC <100 micronsTheir threshold of retinal sensitivity decrease but we did not find any correlation between the choroidal or the retinal thickness and visual functions measured by visual acuity and microperimetry
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