As Ozzy said, for most people the words start appearing clear after a while.
And the brain can actually get the info it needs even from blurry text.
Also, actually the input for each separate eye is clear and enough in focus, but the picture that the brain gives the conscious brain seems blurred, because the conscious mind is not used to using eyes this way. It takes a while before the eyes sort of catch up on what the brain is already doing.
- Sakke