As human beings, we have several balancing and righting mechanisms in the body. Above the trunk itself, at the level of our head, our eyes and ears do a lot of the “righting” or correction to our perceptions.
Actually, 94 percent of what we see is our brain’s interpretation of what we see. Only six percent is literally what our eyes see.
Many times, however, the eye muscles are not totally coordinated. This could be from a fall or trauma, or one of the four cranial nerves that deal with eyes might be malfunctioning. The sphenoid bones, which form part of the eye socket, might be slightly askew. You see, the sphenoid bone has greater and lesser wings — which resemble airplane wings. If one wing is higher than the other, the eyes will have great difficulty tracking together.
If eyes aren’t tracking in sync, or if the eye movement and auditory channels are out of sync, reading will be much slower.