Background We consider epiretinal membranes in terms of the two repair
processes of gliosis and fibrosis and look at the cellular basis of c
ontraction. Methods: Pathological material removed at surgery was exam
ined by a range of morphological procedures. Cultures of fibroblasts,
retinal pigment epithelium cells and retinal glia were subjected to bi
oassays which relate to behavioural activities in scar formation. Resu
lts and conclusions Our findings highlight the importance of activitie
s such as migration and adhesion in the formation of epiretinal membra
nes, and also show that these activities are central to our understand
ing of contraction.