To report a case of isolated choroidal cystic lesion in the macula with no interval change for two years.

A 29-year-old woman who had suspicious maculopathy was referred to our clinic. Her best corrected visual acuity was 20/20 in the affected right eye, which showed a choroidal cystic lesion on a fundus exam, fluorescein angiography, USG and OCT. The multifocal ERG showed reduced amplitudes of the cystic area in the right eye, and SLO microperimetry revealed reduced retinal sensitivity in the cystic lesion as well as a stable fixation and spared foveal function. There was no evidence of underlying ocular disease in clinical assessment, and the lesion had not undergone interval change for the past two years.