5 How to spo t a sub -pixel defect Due to their tiny size relative to the screen, defective sub -pixels can be extremely hard to see. A defect in a sub -pixel is, visually, a single, tiny spot that is so small, it may be visible only if you display it against a background that specifically contrasts with the defective sub -pixel hue. Because they appear brighter to the human eye, defective green sub -pixels may be easier to spot than defective red or blue ones. Sub -pixel defects are also easier to spot...