Akiyama K, et al. - Using focal macular electroretinography (FMERG), authors evaluated the macular function in patients with macula-on rhegmatogenous retinal detachments (RRDs). They conducted a prospective, observational case series of 27 patients diagnosed with a macula-on RRD. The presence of macular dysfunction was suggested with altered FMERG responses in eyes with macula-on RRDs. In the implicit times of any components, findings did not suggest any difference between the affected and fellow eyes. The parameters in the affected eyes were not influenced by any of the 4 retinal factors.