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Paola Giorno, Mariacristina Parravano, Francesco Oddone, Andrea Cacciamani, Giulia Caminiti, Enrico Peiretti, Monica Varano; Influence of Macular Choroidal Thickness on Visual Function in Highly Myopic Eyes. Invest. Ophthalmol. Vis. Sci. 2012;53(14):2159.
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© ARVO (1962-2015); The Authors (2016-present)
To explore the relationship between macular choroidal thickness (CT) and scleral thickness (ST) with visual function in highly myopic eyes.
CT and ST were measured in highly myopic eyes (>6 diopters [D]) by enhanced depth imaging optical coherence tomography (EDI-OCT) obtained by Heidelberg Spectralis (Heidelberg Engineering, Heidelberg, Germany).CT and ST were measured at 1000 μm interval on the horizontal section from 3 mm temporal to the fovea to 3 mm nasal to the fovea. In addition a complete ophthalmological examination, visual acuity measurement and MP1 microperimetry (Nidek Technologies, Padova, Italy) were obtained. The relationships between CT and ST and visual function were explored.
twenty-four eyes from 15 highly myopic patients were included in the analysis. The mean age was 50.5±9.63 years (range 40-60 years), the mean refractive error was -13.2 (±5.5 D) and the mean axial lenght was 29.02±2.4 mm and mean retinal sensitivity was 16.6±2.6 dB. The mean subfoveal CT and ST were 110.5±81μm and 235.21±81.3 μm respectively. No relationship was found between CT and ST (R2<0.001, p=0.98), while a significant relationship was found between CT and axial length (R2=0.35, p=0.0023) and MP1 mean retinal sensitivity (R2 =0.36, p=0.0017).A strong relationship was found between mean retinal sensitivity and both axial length (R2 =0.71, p<0.001) and refractive error (R2=0,60, p <0,001).
Retinal sensitivity, as measured by microperimetry, is related to choroidal thickness which is related to axial length in highly myopic eyes.
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