Patient Education
Membrane & ILM Peel
Outpatient surgery · performed with vitrectomy
Some retinal problems are caused by a layer of tissue lying on the surface of the macula. In macular pucker, a sheet of scar tissue contracts and wrinkles the retina beneath it.
Some retinal problems are caused by a layer of tissue lying on the surface of the macula. In macular pucker, a sheet of scar tissue contracts and wrinkles the retina beneath it. In macular hole, the retina's own innermost layer exerts tension that keeps the hole open. In both, the fix is to peel that tissue away — millimeter-thin membranes lifted off the retina with fine forceps under high magnification, releasing the traction and letting the retina flatten back into shape.
What It Treats
What to Expect
Before
An OCT scan maps the membrane and shows exactly how it is distorting the retina — this is what determines whether surgery is worthwhile and what to expect from it. The peel is performed as part of a vitrectomy, so the preparation is the same.
During
After the vitreous is removed, a dye is often used to stain the transparent membrane so it can be seen. The surgeon lifts an edge and peels the tissue away from the macula in a continuous sheet. For a macular hole the deeper internal limiting membrane is peeled as well, and a gas bubble is placed at the end to help the hole close.
After
Recovery follows the vitrectomy pattern: a red, scratchy eye for a week or two and blurred vision that clears slowly. For macular hole surgery with a gas bubble, vision is very poor until the bubble absorbs and face-down positioning is usually required first.
Recovery & Restrictions
- Standard vitrectomy aftercare: drops on schedule, a shield at night, no rubbing, no swimming, and no heavy lifting for about two weeks.
- If a gas bubble was placed for a macular hole, follow the positioning instructions closely and do not fly until your surgeon confirms the bubble is gone.
- Visual recovery is slow and continues for a long time. Distortion improves over months, and meaningful gains can still appear at six months to a year.
- Expect a cataract to develop or worsen over the following year or two if you still have your natural lens.
- Some distortion often remains. A retina that has been wrinkled for a long time does not return completely to its original shape.
Risks & Side Effects
Cataract
Very likely within a year or two in eyes with a natural lens, as with any vitrectomy.
Incomplete visual improvement
The most important thing to understand before choosing surgery. Peeling relieves the pulling, but the retina does not always flatten completely and some distortion or blur commonly persists.
Membrane recurrence
Scar tissue can re-form and occasionally needs a second peel, though this is uncommon.
Small central blind spots
Peeling the internal limiting membrane occasionally leaves tiny defects in the nerve fiber layer. These are usually not noticed but can be seen on imaging.
Macular hole failing to close
Most holes close with one operation. Large or long-standing holes are less reliable and may need a second procedure.
Retinal tear or detachment
Uncommon, but possible during or after any vitrectomy.
Every procedure carries risk, and this list is not exhaustive. Your doctor will discuss the risks that apply to your eye and your circumstances before you decide.