This extension is a forked version of https://chrome.google.com/webstore/detail/read-mode/nagcaahojecfeopbghgihcabgiepploa
Just click on the glasses icon in the address bar, the current page will turn into a nice-to-read black on white page allowing you to read without forcing your eyes. Ads and Flash animations are also removed while on read-mode. Click the icon again and everything will go back to normal.
Use Alt+F to toggle Reader Mode.
Use Alt+1, Alt+2, Alt+3 to decrease, increase, reset font size.