Title:
VISUAL TARGET PRESENTATION DEVICE AND OPHTHALMOLOGIC APPARATUS
Document Type and Number:
Japanese Patent JP2020031942
Kind Code:
A
Abstract:
To provide a visual target presentation device and an ophthalmologic apparatus capable of presenting a visual target at different optometry distances relative to a subject eye and easily switching the presentation of the visual target to a different optometry distance, yet with a simple configuration.SOLUTION: A visual target presentation device 2 comprises: a display 31 for presenting a visual target O to a subject eye E; a distance lens 33 for forming a virtual image I of the visual target O at a first optometry distance from the eye subject E; a near lens 35 detachably disposed in an optical path between the display 31 and the distance lens 33; and a housing 21 accommodating these, with a window 25 to allow visual recognition of the visual target O. The visual target display device is configured such that an image of the visual target O is formed by the distance lens 33 and the near lens 35 at a second optometry distance shorter than the first optometry distance from the subject eye E when the near lens 35 is displaced in the optical path.SELECTED DRAWING: Figure 4
Inventors:
YANAGI HIDEKAZU
Application Number:
JP2018162058A
Publication Date:
March 05, 2020
Filing Date:
August 30, 2018
Export Citation:
Assignee:
TOPCON CORP
International Classes:
A61B3/028
Domestic Patent References:
| JP2018047095A | 2018-03-29 | |||
| JPH07327928A | 1995-12-19 | |||
| JP2013048753A | 2013-03-14 | |||
| JP2014028070A | 2014-02-13 | |||
| JPH0871041A | 1996-03-19 | |||
| JPH0690902A | 1994-04-05 |
Attorney, Agent or Firm:
Cleo International Law & Patent Office