TNF and low tension glaucoma: The combined results showed that the TNF-α −308G/A gene polymorphism was significantly associated with risks of high-tension glaucoma (A versus G: OR=1.660, 95% CI=1.033–2.667; AA/AG versus GG: OR=1.713, 95% CI=1.10–2.651), but not with normal tension glaucoma or exfoliation glaucoma.