1. L’invention des lentilles de contact par August Muller (1887);Heitz;Contactologia,1981
2. Leonardo’s contact concept;Hofstetter;Contact Lens Forum,1984
3. Eye impressions without anesthesia;Braff;Optom Weekly,1945
4. Contact lens solutions and their wearing time;Goodlaw;Optom Weekly,1946
5. A gas-permeable scleral lens for visual rehabilitation;Schein;Am J Ophthalmol,1990