Dear student
a)
The blind spot is where the optic nerve and blood vessels leave the eyeball. The optic nerve is connected to the brain. It carries images to the brain, where they're processed.
b)
The muscles that move the eyeball are attached to the sclera. Suspensory ligament of lens - a series of fibres that connect the ciliary muscles of the eye with the lens, holding it in place.
With regards