Angle indicator for capsular bag size measurement
US7993398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2007 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Nov 21, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0059
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Implantation of an accommodating intraocular lens in an eye may require the accurate measurement of the size, circumference, or diameter of the capsular bag of the eye. After the natural crystalline lens has been surgically removed, a flexible ring may be temporarily or permanently inserted into the capsular bag for measuring the circumference of the capsular bag. The ring is generally compressible to fit through a surgical incision, then expands to fill the capsular bag along an equatorial region. The ring has a central component that changes shape as the ring is compressed. The shape change is generally correlated to the size of the capsular bag and may be measured visually or with a camera through the cornea, the measurement being generally independent of corneal magnification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.