Method and system for measuring optical characteristics of a contact lens
AssigneesTransitions Optical, Inc., Johnson & Johnson Vision Care, Inc.
InventorsForrest R. Blackburn, Joshua Hazle, Patricia Martin
Life of this patent
Estimating the term…
Abstract
A method of determining the transmittance of a contact lens (200) includes the steps of obtaining a measurement of a first intensity of electromagnetic radiation reflected by ocular surface (100) with an intensity measuring device (400), positioning the contact lens (200) in direct contact with the ocular surface (100), obtaining a measurement of a second intensity of electromagnetic radiation transmitted through the contact lens (200) that is reflected a region (110) of the ocular surface (100) that is covered by the contact lens (200) with the intensity measuring device (400); and calculating the transmittance using the measurements of the first intensity and the second intensity.
Claims18
A method for determining a transmittance of electromagnetic radiation through a contact lens in direct contact with an ocular surface, comprising:
- measuring a first intensity of radiation reflected by at least a portion of an ocular surface with an intensity measuring device;
- positioning a contact lens covering and in direct contact with at least a portion of the ocular surface;
- measuring a second intensity of radiation transmitted through the contact lens that is reflected by at least one region of the ocular surface that is covered by the contact lens with the intensity measuring device;
- and
- calculating a transmittance of electromagnetic radiation through the contact lens using the measurements of the first intensity and the second intensity.
Dependencies are inferred from the claim text.