Forty-five patients with low tension glaucoma were compared with 45 ocular hypertensive patients matched for age and sex. The low tension glaucoma group had a significantly higher rate of hemodynamic crises, low systemic blood pressure, and low ophthalmic blood pressure. Progression occurred in fewer than half of the patients with low tension glaucoma.
Drance SM, Sweeney VP, Morgan RW, Feldman F. Studies of Factors Involved in the Production of Low Tension Glaucoma. Arch Ophthalmol. 1973;89(6):457-465. doi:10.1001/archopht.1973.01000040459003