Remote-controlled LCD sight-testing instrument

Details Remote-controlled LCD sight-testing instrument Remote-controlled LCD sight-testing instrument

1998-02-24

1999-05-25

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

A61B 300

Patent

active

059073896

ABSTRACT:
A remote-controlled LCD sight-testing instrument which includes a mainframe and a remote controller, the mainframe having a display module, the display module being controlled by a control switch of the remote controller to show different test patterns for testing the user's visual acuity, the remote controller having a plurality of direction buttons through which the user gives an answer to every test pattern shown on the display module, the mainframe further having a visual acuity display unit controlled to indicate the user's visual acuity by digital and alphabet, and a buzzer controlled to give a particular sound after test of every test pattern subject to the test result.

REFERENCES:
patent: 4550990 (1985-11-01), Trispel et al.
patent: 5790234 (1998-08-01), Matsuyama
patent: 5793469 (1998-08-01), Feiertag

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