Patents Assigned to Jugvir I. Singh-Derewa
  • Presbyopia correction using a protected space pattern, methods and apparatus
    Patent number: 5803923
    Abstract: A zone of increased curvature is produced in the inferior lower quadrants of the cornea FIG. 1 (5). This zone produces a "plus effect" FIG. 2 (5) which leads presbyopia patients to be able to read from near distance again. Such effect is achieved using photoablitive techniques and fixation, patterns, and apparatus specially designed.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: September 8, 1998
    Assignee: Jugvir I. Singh-Derewa
    Inventors: Jugvir Inder Singh-Derewa, Heraldo Sa Martins, Etelvino Teixeira Coelho