Describe how parallax in the viewing system of a level can be detected and removed. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Words may be used more than once. ResetHelp After focusing, if the cross hairs appear to travel over the object sighted when the eye is shifted slightly in any direction, Blank exists. The Blank, the eyepiece, or both must be refocused to Blank this effect if accurate work is to be done.