Which of the following is a possible cause of ischaemic optic neuropathy?

Ischaemic optic neuropathy occurs due to insufficient blood supply to the optic nerve, leading to damage and loss of vision. Temporal arteritis, also known as giant cell arteritis, is a significant potential cause of this condition. It involves inflammation of the blood vessels, particularly the temporal arteries, which can impede blood flow to the optic nerve. This interruption in blood supply can result in ischemia and subsequent optic nerve damage, characterizing ischaemic optic neuropathy.

The other conditions listed, while affecting vision, do not primarily cause ischemic damage to the optic nerve in the same manner. Glaucoma involves increased intraocular pressure leading to optic nerve damage but is not primarily an ischemic condition. Vitreous hemorrhage pertains to bleeding within the eye's vitreous cavity and does not directly affect optic nerve perfusion. Retinal detachment involves the separation of the retina from its underlying supportive tissue, which can lead to vision loss but also does not cause ischemic optic neuropathy.