Macular epiretinal membrane (MEM) treatment


Surgery improves vision in


of cases

Possibility of


in one session: vitrectomy + cataracts

What is MEM?

Macular epiretinal membrane (MEM) means tissue grows over the surface of the retina in the macular area that can contract and cause a loss of sight and image distortion.

What causes it?

It is caused by some cells being deposited over the macula that usually come from the retina, but can come from the layers located below the retina, such as the pigment epithelium.

These cells secrete collagen, forming a mesh, and can then apply traction to the collagen. Since this tissue is attached to the retina, when it contracts the retina also contracts and warps.

How can it be prevented?

These membranes most commonly appear in patients over the age of 50, but can also occur at any age. They are sometimes a result of a retinal hole, which enables cells to pass through the retina from the sub-retinal area.

It is therefore very important that before symptoms appear that could imply a retinal hole, such as floaters or flashing lights, you see your ophthalmologist to have these holes immediately repaired. In this way you can also avoid retinal detachment.

It can also appear after ocular surgery, hence post-operative monitoring is very important.


The most common symptoms are loss of sight, blurred vision or image distortion.

Lines may be seen distorted and numbers and letters can appear to jump out of line.

Associated treatments

It is very important to monitor that a retinal detachment is not being formed by examination in the post-operative period and seeing an ophthalmologist if you suffer any of these symptoms.

The most suitable treatment for MEM is a vitrectomy.


IMO Institute of Ocular Microsurgery

Josep María Lladó, 3
08035 Barcelona
Phone: (+34) 934 000 700
See map on Google Maps

By car

GPS navigator coordinates:
41º 24’ 38” N – 02º 07’ 29” E

Exit 7 of the Ronda de Dalt (mountain side). The clinic has a car park with more than 200 parking spaces.

By bus

Autobus H2: Rotonda de Bellesguard, parada 1540

Autobus 196: Josep Maria Lladó-Bellesguard, parada 3191

Autobuses H2, 123, 196: Ronda de Dalt – Bellesguard, parada 0071

IMO Madrid

C/ Valle de Pinares Llanos, 3
28035 Madrid
Phone: (+34) 910 783 783
See map in Google Maps

Public transport

Metro Lacoma (líne 7)

  • Lines 49 & 64, stop “Senda del Infante”
  • Line N21, stop “Metro Lacoma”


Patient care:
Monday to Friday, 8 a.m. to 8 p.m.

IMO Andorra

Av. de les Nacions Unides, 17
AD700 Escaldes-Engordany, Andorra
Phone: (+376) 688 55 44
See map in Google Maps

IMO Manresa

C/ Carrasco i Formiguera, 33 (Baixos)
08242 – Manresa
Tel: (+34) 938 749 160
See map in Google Maps

Public transport

FGC. Line R5 & R50 direction Manresa. Station/Stop: Baixador de Manresa


Monday to Friday, 08:30 A.M – 13:30 PM / 15:00 PM – 20:00 PM

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