In most cases the development of an Epiretinal Membrane Disease appears to be related to normal ageing changes inside the eye.
In some cases, it can be related to other conditions such as diabetes, blockage of a blood vessel, inflammation or following retinal surgery.
ERMs are related to Macular Degeneration, they do not generally affect the other eye.
ERMs are quite common and affect up to 8% of people in later years.
[British and Eire Association of Vitreoretinal Surgeons – Epiretinal Membrane, see https://beavrs.org/]