glaucoma

Glaucoma is an eye condition that can lead to damage of the optic nerve due to increased pressure in the eye (intraocular pressure).


Vitamin A a multi-functional, essential vitamin.

Vitamin A is extremely important for a number of reasons most notably the maintenance and growth of membranes (including the retina of the eye), but it is also a toxic vitamin in high doses. Read how early artic explorers and their dogs faced death when eating the vitamin A rich livers of polar bears.