In this function, y is the dependent variable and x is the independent variable. Variable used in an experiment or modelling can be divided into three types:  dependent variable ,  independent variable , or other.
About 70% of men have an eye dominance that matches their handedness. BUT, 30% do not. Most right handers have a dominant right eye and the bulk of southpaws a dominant left. These are the people who are well advised to shoot both eyes open (assuming that they are shooting from their strong shoulder).
For the protein Strabismus, see Strabismus (protein). Strabismus, also called crossed eyes, is a condition in which the eyes do not properly align with each other when looking at an object. Which eye is focused on the object in question can switch. It may also be present occasionally or constantly.