Fibrous tunic of eyeball. From Wikipedia, the free encyclopedia. The sclera and cornea form the fibrous tunic of the bulb of the eye; the sclera is opaque, and constitutes the posterior five-sixths of the tunic; the cornea is transparent, and forms the anterior sixth.The term corneosclera is also used to describe the sclera and cornea together.ibrous tunic of eyeball. From Wikipedia, the free encyclopedia. The sclera and cornea form the fibrous tunic of the bulb of the eye; the sclera is opaque, and constitutes the posterior five-sixths of the tunic; the cornea is transparent, and forms the anterior sixth.
The philosophy as well as the religion of the Greeks found its first expression in poetry, philosophical speculation, properly so called, being preceded by the effort of the imagination to picture to itself the origin and the evolution of the universe.
For reasons of space, I make no attempt to cover, or even to mention, every aspect of ancient Greek logic. I have preferred instead to concentrate on illustrating its philosophical aspects. 1 The Origins: Parmenides and Zeno. Greek philosophical logic originates with Parmenides (c. 510âc. 440 BCE). Though. Parmenides cannot be said to have had a logic, or even an interest in studying the valid-. ity of arguments, his views did much to set the agenda out of which many things in. Greek philosophy, including logic, later arose.