For nearsighted people (can't see far away without glasses), wearing glasses with a weaker prescription should help. My monitor is about 2 feet from my eyes. That's 0.66 metres. 1 / (0.66 metres) = 1.5 Diopters. So, if I replace my -6 D lenses with -4.5 D ones, my eyes have to focus as they would on an object infinitely far away. The special "computer glasses" tend to be like reading glasses, but with weaker prescriptions since computer screens are farther than a book. Don't wear -5.5 D contacts and +1 D computer glasses when you could have your optician make you -5 D glasses to do the job. In case you're wondering how -5.5 (contacts) + 1 (glasses) = -5 (glasses), it's because glasses sit 1.4 cm away from your eyes. -5D glasses have a 1m/5 = 20 cm focal length. When placed 1.4 cm in front of your eyes, they're effectively only correcting 1 / 21.4 cm = 4.67 D and I rounded to the nearest 0.5.