How does the eye read words?

The eye reads Words by doing the following: First, light hits the page, from whichever light source it happens to be coming from. It is reflected by the rest of the page, but only whatever colour the Word is gets reflected back. the reflected light enters your eyes, and hits your retina. Your retina registers the colour, then sends the info to your brain. Your brain decodes the image, using information it's been taught, such as the meaning of a Word, to match the image with something in its experience. Most likely, it will make a match, and thus, you know what that Word means, and you also know that it is a Word. That's also how I'm writing this answer, except that instead of reflecting light, the computer screen is emitting coloured light.