Epiretinal membrane
What is it?
An epiretinal membrane (ERM) is a thin layer of fibrous tissue that develops on the surface of the retina, more specifically on the macula, the central area of the retina responsible for fine vision and detail. It is also known as premacular membrane or macular gliosis.
Causes and risk factors
It can appear :
- Idiopathic (no identified cause), often in people over 50.
- After an eye condition such as retinal detachment, diabetic retinopathy or intraocular inflammation.
- Following eye surgery, especially cataract surgery.
Symptoms
- Progressive decline in visual acuity
- Deformation of straight lines (metamorphopsias)
- Blurred vision
- Difficulty reading or seeing small details
Treatment
If the membrane is thin and does not affect vision to any great extent, simple ophthalmological follow-up is all that’s needed.
In the event of significant discomfort, a vitrectomy with membrane peeling may be performed to improve vision and reduce distortion.