writes "There are major shortcomings with Office 2013 UI redesign. Some have stated that the white background and its overall lack of contrast and brightness has “caused their eyes to bleed.” There are some users who claim they have had eye problems after several weeks of using Outlook and Word for several hours per day. The new color scheme is quite bad overall and you have limited options in trying to change it. Outlook by default a low contrast white scheme which can be hard on the eyes and hard to tell what is what. That is, there is no clear distinction between functional areas like user controls and system controls. Not only this but white space optimization throughout the UI, particularly in Outlook and Lync is horrendous.
The preview area in Outlook becomes almost useless due to the huge consumption of space by elements in the header such as the photo, subject and title.
Typing in Outlook and even more so in Excel, often leaves your cursor in a lagged or streaky appearance, akin to that of typing on terminals of the 1990s."Link to Original Source