Training a better Haar and LBP cascade based Eye Detector using OpenCV

Sometimes things work out of the box. Such occasions present an opportunity to get better. Object detection using Haar feature-based cascade classifiers is more than ax decade and a half old. OpenCV framework provides a pre-built Haar and LBP based cascade classifiers for face and eye detection which are of reasonably good quality. However, I had never measured the accuracy of these face and eye detectors.