Automatic refracto-keratometer
US8727534B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2011 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Sep 4, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/152
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An auto refracto-keratometer not only produces a black-and-white image for observing the alignment of eyes to be examined using an infrared illumination light but also has a color observation optical system for observing a condition of eyes to be examined using color-illumination light. The auto refracto-keratometer comprises an infrared optical system for examining an alignment and corneal curvature of eyes to be examined; a fogging optical system for relaxing accommodation of the eyes; a measuring optical system for measuring refractive power of the eyes; and a color observation optical system having a visible light source for emitting at least one visible light to the eyes and a 2-dimensional imaging device for detecting image of visible light reflected by the eyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.