ahoy exclamation. âº a âshout used, âespecially by âpeople in âboats, to âattract âattention: Ahoy there!
Glaucoma is characterized by optic nerve damage which results in vision loss, and elevated eye pressure (intraocular pressure) is the primary risk factor. There is growing evidence that other factors may predispose a person to glaucoma damage, including circulation to the eye and optic nerve.
Other potential causes of eye redness include: 1  Colds or allergies.  Acute glaucoma: A sudden increase in eye pressure that is extremely painful and causes serious visual problems. This is a medical emergency.