A 28-year-old woman presents to the eye clinic 6 weeks after a chemical splash injury to her right eye from an industrial cleaning solution (ammonia-based). She had received immediate irrigation and topical treatment. Now she complains of progressive redness, foreign body sensation, and recurrent episodes of eye discharge. On slit-lamp examination, the cornea shows central scarring with neovascularization, and the conjunctiva demonstrates symblepharon formation with loss of conjunctival fornices. What is the most appropriate next step in management?