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E. Arimura, C. Matsumoto, S. Hashimoto, S. Takada, S. Okuyama, Y. Shimomura; RETINAL CONTRACTION AND METAMORPHOPSIA SCORES USING M–CHARTSTMINTHE NATURAL COURSE OF EPIRETINAL MEMBRANES . Invest. Ophthalmol. Vis. Sci. 2004;45(13):5456.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: The M–CHARTSTM developed by us are new test charts for quantifying the degree of metamorphopsia with a rapid and simple task. We investigated the relationship between the retinal contraction and metamorphopsia scores using M–CHARTSTM in the natural course of epiretinal membranes (ERM). Methods: Using M–CHARTSTM, we quantified the changes in the metamorphopsia scores of 28 eyes of 28 patients with ERM. The follow–up periods of the ERM subjects ranged from 12 to 42 months (mean: 20.3 months). Using a new image analyzing software developed by us, we composed the fundus images by matching of the optic discs and choroidal vessels. The movement of the retinal vessels was evaluated in 25 areas of the central 20 degree macula area during the observation periods in order to quantify the retinal contraction due to ERM. The visual acuities and the static visual fields on the macula area (1 degree resolution) were also evaluated. Results: There was a significant correlation between the degree of retinal contraction and metamorphopsia score (p<0.05). It was also suggested that there was a relationship between the direction of the ERM contractions and the direction of the metamorphopsia. However, there were no significant correlations between the degree of retinal contraction and visual acuity or retinal sensitivity on the macula area. Increase of metamorphopsia scores was observed in 8 patients during the follow–up periods. Increase of metamorphopsia scores and decrease of visual acuities was observed in 2 patients. Decrease of metamorphopsia scores was observed in 2 patients whose ERM spontaneously disappeared. Only one patient showed a decrease of visual acuity without increase of metamorphopsia score. Conclusions: M–CHARTSTM is a simple and useful method for the detection and follow–up of metamorphopsia in patients with ERM.
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