n %
Men 8 17
Age (years) 64 (range, 24-82)
Symptom duration (months) 3 (range, 1-24)
Preoperative internal diameter (microns) 457 (range, 135-954)
Preoperative height (microns) 398 (range, 192-587)
Macular status (Gass classification)1
   MHG II 9 19.5
   MHG III 22 47.8
   MHG IV 15 32.6
Macular status (IVTS classification system)3    
   Small MH 8 17.3
   Medium MH 23 50
   Large MH 15 32.6
Fellow-eye status
   Normal 32 70
   MHG I to IV 14 30
Lens status
   Phakic 6 13
   Cataract 13 28
   Pseudophakic 27 59
Associated ERM 10 22
Associated macular edema 19 41
MHG: Macular Hole Grade; IVTS:  International Vitreomacular Traction Study; ERM: Epiretinal Membrane
Table 1: Patient demographic characteristics.