Method for modifying the refractive index of ocular tissues
US8512320B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Mar 8, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/0088
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is directed to a method for correcting vision in a patient by modifying the refractive index of cornea tissue. The method comprises identifying and measuring the degree of vision correction of the patient; and determining the position and type of refractive structures to be written into the cornea tissue of the patient to correct the patient's vision. The refractive structures are written by irradiating select regions of the cornea tissue with focused laser pulses having a wavelength from 400 nm to 900 nm and a pulse energy from 0.01 nJ to 10 nJ. The refractive structures are characterized by a positive change in refractive index in relation to non-irradiated cornea tissue of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.