How can you reduce eye strain at the computer?

Several things. Have the correct prescription, have the best ergonomic computer screen/chair/desk setup, adjust screen brightness and other display settings according to lighting conditions, take breaks during extended usage, treat dry eye.

Related Questions

How can you reduce eye strain while using the computer?

Breaks. Have a good computer setup, appropriate screen brightness and font size, proper vision correction with enough breaks to rest your eyes. Read more...
Rest. Our eyes are designed to see things in 3d. When you look at a computer/book etc for a long time (a 2d surface) you can strain your eyes or get dry eyes. Every 20 minutes rest your eyes for 20 seconds by looking at something at least 20 feet away. Read more...