Is it accessible to do a reinstallation of Mavericks with no vision at all?
Yes the reinstall of a mavericks install is very accessible from start to finish.
To re-install the opperating system, do the following.
1. when the computer starts, right after you hear the startup sound, hold down command, and r.
2. hold those keys down for a few seconds, and the mac should boot in to the recovery drive.
3. After the mac is booted, press command f five. Voice ofer should start up right away, and you can continue with the installation.