The distribution of the pressure in the (A) central retinal vein and (B) central retinal artery measured by using contact lens ophthalmodynamometer in normal-tension glaucoma (NTG) patients with and without optic disc hemorrhage (ODH): (1) group A (eyes of bilateral NTG patients with ODH); (2) group B (fellow eyes with no ODH); (3) group C (randomly selected eyes of bilateral NTG patients without an episode of ODH).

<p>The distribution of the pressure in the (A) central retinal vein and (B) central retinal artery measured by using contact lens ophthalmodynamometer in normal-tension glaucoma (NTG) patients with and without optic disc hemorrhage (ODH): (1) group A (eyes of bilateral NTG patients with ODH); (2) group B (fellow eyes with no ODH); (3) group C (randomly selected eyes of bilateral NTG patients without an episode of ODH).