If you read further on the VSP blog, Dr. Nathan Bonilla-Warford, O.D. has an article about Eye Health for the Workplace where he warns about Visual Focusing Problems induced by computers:
The strain on your eyes when focusing on paper or a computer screen can become fatiguing over time. Some people have visual focusing and coordination problems that make reading or using a computer uncomfortable or cause headaches.
Solution: Take frequent breaks (20-20-20 rule: after 20 minutes of computer use, look at something 20 feet away for 20 seconds). You may also benefit from specific glasses prescribed for office work that help you focus at the correct distance.
But, you know, I still want one any how!