Visual examining and training device

A visual examining and training device suitable for wearing by a user, comprising:

• a wearing unit that is suitable for wearing on a head of the user, that is configured to be disposed in front of the eyes of the user, and that includes a main housing;
• two lens adjusting units disposed in said main housing and spaced apart from each other in a left-right direction for the eyes of the user to view an object, each of said lens adjusting units including
• a lens carrier including a plate member formed with two through holes spaced apart in the left-right direction, a tubular member extending rearwardly from said plate member at a position corresponding to one of said through holes and defining an inner space communicating and aligned with said one of said through holes, and a support bracket connected to said plate member and said tubular member and corresponding in position to the other one of said through holes,
• a rotary lens holder assembly disposed in said inner space of said tubular member,
• two prisms coaxially disposed in said rotary lens holder assembly and spaced apart from each other in a front-rear direction,
• a focal length adjusting lens disposed in said inner space of said tubular member and spaced apart from said prisms in the front-rear direction for adjusting a focal length of a corresponding one of the eyes of the user, and
• a drive mechanism mounted on said support bracket and connected to said rotary lens holder assembly for driving said rotary lens holder assembly together with said prisms to rotate;
• and
• a control unit signally connected to said drive mechanisms of said lens adjusting units and being able to be triggered by a control signal to control the operation of said drive mechanisms;
• wherein said tubular member has an upper portion formed with a cutout portion communicating with said inner space and proximate to said plate member, and a mounting seat extending across said cutout portion;
• wherein said rotary lens holder assembly includes
• two rotary lens holders that are disposed rotatably and coaxially in said inner space of said tubular member, that are spaced apart from each other in the front-rear direction, and that has an outer peripheral surface provided with a plurality of spaced-apart teeth, said rotary lens holders being located at positions corresponding to front and rear sides of said mounting seat, and
• a transmission gear rotatably mounted on said mounting seat and meshing with said teeth of said rotary lens holders;
• wherein said two prisms are received respectively and fixedly in said rotary lens holders;
• and
• wherein said drive mechanism includes a drive module connected to one of said rotary lens holders and being controllable by said control unit to operate and drive said one of said rotary lens holders to rotate, which in turn, drives the other one of said rotary lens holders to rotate in an opposite direction through said transmission gear, said prisms being respectively driven by said rotary lens holders to rotate therewith in opposite directions.