Research the causes of related medical symptoms such as: 1  Eye. 2  Eye symptoms (5412 causes) 3  Eye disease. 4  Eye disorder. 5  Eye problem (5412 causes) 6  Eye pain (475 causes) 7  Itch (1068 causes) 8  more symptoms...Â».
How to read the Histogram. A histogram is a graphical representation of the pixels exposed in your image. The left side of the graph represents the blacks or shadows, the right side represents the highlights or bright areas and the middle section is mid-tones (middle or 18% grey).
Here's a histogram of CPM scores. To view the WPM equivalents, hover your mouse pointer over the scores. All scores are grouped in ranges; these are at the bottom. Per range, the height of the corresponding bar indicates how many tests resulted in a score within that range.