Means and method for demonstrating the effects of low cylinder astigmatism correction
US10064547B2 · kind B2 · utility
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18References
1Claims
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Key dates
| Filing date | Jan 22, 2016 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jan 22, 2036 |
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.