title: Internal limiting membrane peeling with indocyanine green or trypan blue in macular hole surgery: a randomized trial.
abstract: OBJECTIVE
  To report on anatomical and visual outcomes after vitrectomy and internal limiting membrane peeling for idiopathic macular hole repair.
  
  
  METHODS
  Forty patients with stage II to IV idiopathic macular holes were randomly assigned (1:1) in a 2-arm, single-center, randomized controlled . Internal limiting membrane delamination was performed using indocyanine green (ICG) solution (n = 20) or trypan blue (TB) (n = 20). Two patients did not complete the study, for a total of 19 in each group. Follow-up examinations included Early Treatment of Diabetic Retinopathy Study visual acuity, scanning laser ophthalmoscope microperimetry, optical coherence tomography, and fluorescein angiography. Main Outcome Measure Visual acuity 3 months after surgery.
  
  
  RESULTS
  Visual acuity did not show a significant difference between study groups (95% confidence interval [CI], -2 to 1 lines). The rate of macular hole closures was identical (84%; 95% CI, 60% to 97%). Within-group visual recovery was significant only in the TB group. Central scotomata despite hole closure persisted in 8 patients (42%) in the ICG group and in 5 (26%) in the TB group.
  
  
  CONCLUSIONS
  Although no statistically significant difference was detected for the primary end point, the better visual recovery in the TB group and the higher rate of persistent central scotomata in the ICG group justify a larger clinical trial. Application to Clinical Practice No statistically significant difference in visual acuity between ICG and TB in the used concentrations and application method could be proved in macular hole surgery.
authors.affiliation: University Eye Clinic, University Hospital Schleswig-Holstein, Campus Lübeck, University at Lübeck, Lübeck, Germany.
authors.forename: Julia
authors.initials: J
authors.lastname: Beutel
authors.forename: Gerlinde
authors.initials: G
authors.lastname: Dahmen
authors.forename: Andreas
authors.initials: A
authors.lastname: Ziegler
authors.forename: Hans
authors.initials: H
authors.lastname: Hoerauf
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D004396:Coloring Agents / Q000009:adverse effects; D019773:Epiretinal Membrane / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D005451:Fluorescein Angiography; D006801:Humans; D007208:Indocyanine Green / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011379:Prognosis; D012167:Retinal Perforations / Q000175:diagnosis / Q000601:surgery*; D041623:Tomography, Optical Coherence; D014343:Trypan Blue / Q000009:adverse effects; D014792:Visual Acuity; D058609:Visual Field Tests; D014821:Vitrectomy
chemical_list: D004396:Coloring Agents; D014343:Trypan Blue; D007208:Indocyanine Green