How many eyes do you figure that they have?

Revelation 4:6 And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.

 8 And the four beasts had each of them six wings about him; and they were full of eyes within: and they rest not day and night, saying, Holy, holy, holy, Lord God Almighty, which was, and is, and is to come.

Are they no "full of eyes", before and behind

Also, are not their wings full of eyes within?

With all those eyes, would it be like looking at a lot of monitor screens at the same time?

Or was their mind created to process information from all the eyes at the same time, like our mind does with two eyes?