1. Corneal clearance at the apex and edge of a hard corneal lens;Tomlinson;ICLC,1977
2. Designing rigid gas permeable contact lenses using edge clearance technique;Guillon;J BCLA,1983
3. Corneal topography investigation and principles of contact lens design on the basis of photokeratometry;Kivayev;Contact Lens J,1986
4. Tear layer thickness characteristics of rigid gas permeable lenses;Guillon;Am J Optom Physiol Opt,1986
5. The effect of varying axial edge lift on silicone/acrylate lens performance;Bennett;Contact Lens J,1986