What is the preferred surgery in cases of Pterygium-Amniotic Membrane Graft or Conjunctival graft? What are the merits of each technique? Do you use tissue glue in cases of Amniotic Membrane graft in Pterygium?

What is the incidence of recurrence in Amniotic Membrane graft? Can we have some problems in identifying the stromal surface of Amniotic Membrane? Do you suture Amniotic Membrane to the conjunctiva or to episcleral tissue?