4.3 Optical Aberrations

If lenses in the real world behaved exactly as described in Section 4.2, then VR systems would be much simpler and more impressive than they are today. Unfortunately, numerous imperfections, called aberrations, degrade the images formed by lenses. Because these problems are perceptible in everyday uses, such as viewing content through VR headsets or images from cameras, they are important to understand so that some compensation for them can be designed into the VR system.