Age

19–any

Sex

ALL

Healthy volunteers

Accepted

Epiretinal membrane with associated macular thickening or cystoid macular edema present;
ETDRS best corrected visual acuity 20/50 or worse attributed to the effects of the epiretinal membrane;
Pars plana vitrectomy/membrane peel planned for treatment of the epiretinal membrane;
Patients older than 19 years of age;
No co-existent retina pathology or optic neuropathy that may influence the visual field.

Patient unwilling or unable to provide informed consent;
Co-existing retina pathology (proliferative diabetic retinopathy, central retinal vein occlusion, branch retinal vein occlusion, central/branch retinal artery occlusion, ERM secondary to trauma, prior surgery for ERM);
Co-existing lenticular opacity;
Optic neuropathy causing a pre-existing visual field defect involving the central 10 degrees of vision.

Comparison of Two Techniques for Epiretinal or Internal Limiting Membrane Peel