1. Converting wet cell measured soft lens power to vertex power in air.;Campbell;Int Contact Lens Clin,1984
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3. Aberrations associated with rigid contact lenses.;Atchison;J Opt Soc Am (A),1995
4. Spherical aberration 3.;Bennett;Optician,1954
5. Treatise on the Reflexion and Refraction of Light, Being Part 1 of a System of Optics.;Coddington,1829