As part of a bio-engineering approach to study myopia, a structural model of the eye is proposed. The model is based on structural laws as employed by civil engineers, and on mechanical properties of the sclera and vitreous previously analyzed by the authors. The described structural behavior relates many loose clinical observations and indicates that progressive myopia should be considered a mechanical problem due to an abnormal vitreous pressure rather than an optics problem. From this bio-engineering approach, vitrectomy is suggested as the appropriate solution.