Turn off some of the offending fluorescent lights. Sometimes it is a single fluorescent fixture in the ceiling which is just in front of the person. Very often a single offending fixture can be turned off without creating lighting deficiencies. Many offices have too much light anyway. When turning off lights, however, consideration must be given to co-workers who may rely on the light coming from that particular fixture.
Many offices have two wall switches controlling the fluorescent light fixtures.
Each switch turns on half of the bulbs in all of the fixtures. Most commonly, both switches are turned on for the day. Very frequently, however, people are more comfortable with only one switch turned on, effectively cutting the room illumination in half. Fluorescent light fixtures can be retrofit with parabolic louvers which direct the light straight down into the room. Re-orient the work station so that bright lights are not in the field of view.