Quantitative Evaluation of Metamorphopsia With Using M-CHARTS

Abstract

Purpose: To determine whether M-CHARTS(R) (Inami Co. Tokyo, Japan) is useful in objectively assessing metamorphopsia before and after vitrectomy of macular disease. Subjects and Methods: Twenty eyes of 20 patients, who underwent vitreous surgery for treatment of macular disease in June to October 2007, were used as the subjects (premacular membrane: 9 eyes of 9 patients, macular edema: 10 eyes of 10, and macular hemorrhage: an eye of one). Visual acuity test and M-CHARTS were carried out 2 weeks (mean) before and after the vitreous surgery to investigate the relationship between the results of these tests and the subjective symptoms of the patients. Results: The scores of metamorphopsia were improved after the vitrectomy. The improvement was almost coincident with that of the subjective symptoms. The scores of metamorphosia were mostly reduced even though the visual acuity did not change after the vitrectomy. Conclusion: It is demonstrated that M-CHARTS can help to easily and objectively quantify subjective symptoms of patients with metamorphopsia. M-CHARTS is very useful in evaluation of therapeutic results.