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).
Commonly referred to as crossed eyes, esotropia is a common type of strabismus in which one or both eyes turn inward toward the nose. It is most often identified in children between the ages of 2 and 4, although it can occur at any age.