Ophthalmic apparatus
US6409343B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Oct 5, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/152
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is an ophthalmic apparatus having a measurement unit for measuring an eye to be examined, an illumination light source, disposed near the measurement unit, for illuminating the eye, an area sensor for picking up an image of the anterior part of the eye illuminated by the illumination light source, a driver for driving the measurement unit relative to the eye forward or backward, and a determining unit for determining whether signal levels throughout the whole area of the area sensor are not more than a predetermined level. When the determining unit determines that the signal levels are not more than the predetermined level, it is judged that the apparatus is too close to the eye and the driver drives the measurement unit away from the anterior part of the eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.