Patents Assigned to PRECISION VISION, INC.
  • System and method for measurement of contrast sensitivity
    Patent number: 10660516
    Abstract: An apparatus and method for evaluating a patient's contrast sensitivity. The apparatus including a table or chart with a plurality of shaded marks printed in cells in the table or chart. The shaded marks printed with a various contrasts with a log of Weber contrast ranging from ?0.20 to ?2.15. Where a subject marks an observed position of the shaded marks and a key is used to check the observed position against an actual position of the shaded mark to determine a threshold contrast of the subject.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: May 26, 2020
    Assignee: PRECISION VISION, INC.
    Inventor: John Robson
  • SYSTEM AND METHOD FOR MEASUREMENT OF CONTRAST SENSITIVITY
    Publication number: 20180263487
    Abstract: An apparatus and method for evaluating a patient's contrast sensitivity. The apparatus including a table or chart with a plurality of shaded marks printed in cells in the table or chart. The shaded marks printed with a various contrasts with a log of Weber contrast ranging from ?0.20 to ?2.15. Where a subject marks an observed position of the shaded marks and a key is used to check the observed position against an actual position of the shaded mark to determine a threshold contrast of the subject.
    Type: Application
    Filed: March 19, 2018
    Publication date: September 20, 2018
    Applicant: PRECISION VISION, INC.
    Inventor: John ROBSON