Means and method for demonstrating the effects of low cylinder astigmatism correction
US9265412B2 · kind B2 · utility
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16References
1Claims
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Key dates
| Filing date | Aug 27, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Oct 26, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A new vision test, incorporating textual and non-textual elements in an image, is configured to demonstrate the effects of low cylinder astigmatism and other sources of blur on visual quality. The elements are designed to be noticeable, relevant, important and engaging. The new vision test may be utilized to supplement conventional vision testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.