People with myopia have difficulty to focus on distant objects, while they can see close objects well. While not a major cause, can generate better known as headache or headaches in affected children.

Myopia is the visual pathology or disease more prevalent around the world. According to scientific sources, developed countries like the United States and Japan reached an expression of approximately 25% of the population in general.

The severity of myopia is measured in diopters. The diopter is the way to measure the power of a lens.

It is considered that myopia corrected with lenses larger than or equal to 6 diopters are high or severe. Besides the inconvenience caused in the vision, high myopia have increased risk for retinal detachment, glaucoma and other eye diseases.

The treatment of myopia include: correction with glasses or air, treatment with contact lenses, corrective treatment with intra-ocular lenses, surgery or refractive surgery.