02. Ford M, Stone J, Rabbetts R. Optics and lens design. In Phillips AJ, Speedwell L. Contact Lenses (5th ed.) London, Butterworth Heinemann Elsevier, 2007:129-158.

02. Ford M, Stone J, Rabbetts R. Optics and lens design. In Phillips AJ, Speedwell L. Contact Lenses (5th ed.) London, Butterworth Heinemann Elsevier, 2007:129-158.