If you are struggling with poor distance vision you may be suffering from myopia
Types of Myopia
Mild nearsightedness (generally less than 3 diopters of myopia) is referred to as called low myopia. Moderate nearsightedness or myopia is 3 to 6 diopters of myopia.
Severe nearsightedness (more than 6 diopters of myopia) is also called high myopia.
A diopter is a unit of measurement used in optometry to measure the power of lenses. It is a unit of refractive power which is the degree to which a lens can bend light. The higher the number of diopters, the stronger the lens.