The use of more equal as in from now on their relationship will be a more equal one is acceptable in modern English usage. Equally is preferred to equally as in sentences such as reassuring the victims is equally important.
a pathway over which a visual sensation is transmitted from the retina to the brain. A pathway consists of an optic nerve, the fibers of an optic nerve traveling through the optic chiasm to the lateral geniculate body of the thalamus, and optic radiations terminating in an occipital lobe. Each optic nerve contains fibers from only one retina.
The optic nerve primarily routes information via the thalamus to the cerebral cortex, where visual perception occurs, but the nerve also carries information required for the mechanics of vision to two sites in the brainstem.