Downward viewing optical device
BACKGROUND OF THE INVENTION 
     Many work environments require workers to look down on a table or desk top for long periods. In order to look down the head must tilt forward. When forward, the weight of the head is no longer balanced on top of the shoulders the muscles and vertebra must hold it up. This causes fatigue of the muscles and vertebra of the neck and shoulders. This neck fatigue has been the cause of numerous sick days and doctor visits with complaints of neck pain, muscle spasm, and headache to name a few. 
     Even while relaxing, the neck is often held in a position that can bring on fatigue. When sitting in certain types of chairs to read or watch television the neck muscles and vertebra are often being stretched. The longer the activity the greater the strain, and hence, pain. Furthermore, over long periods of time the muscles and vertebra of the neck adjust to being bent and a perminant stoop is developed. 
     The optical viewing device to be described will enable the viewer to maintain a head erect, horizontal line of sight while the vision is directed vertically down. Or while laying down on the back looking up one may have their vision directed horizontally towards the feet, perhaps at a television or a book on the lap. 
     BRIEF SUMMARY OF THE INVENTION 
     This invention is designed to reflect the line of sight down while holding the head in the upright erect position. Two mirrors are employed. The first closer to the face and just under the horizontal line of sight. The second further from the face and above the horizontal line of sight. 
     If only one mirror was used the image would be upside down and backwards. So two mirrors are needed to make the reflected image appear normal, and words readable. 
     For a greater understanding of the nature and features of the invention, reference should be had to the following detailed description taken in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 illustrates a person wearing a headband on which is attached the optical viewing apparatus described; 
     FIG. 2 is a side view of the persons head in phantom looking through the optical viewing apparatus, of the present invention, which is attached to glasses; 
     FIG. 3 is a top plane view of the optical viewing apparatus attached to glasses; 
     FIG. 4 is a front on view of the optical viewing apparatus attached to glasses being worn on a persons face; 
     FIG. 5 shows the optical viewing apparatus attached to a visor while wearing glasses; and 
     FIG. 6 shows a side view of the frame holding the mirrors which attaches to glasses in a removable manner. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention provides an optical viewing apparatus which will enable a person&#39;s neck and head to be straight and upright while reading a book at waist level on the table top. This will greatly reduce the amount of muscle fatigue in the neck and related complications. 
     Looking to FIG. 1, a person 6 is wearing a headband 7 with mirrors 15 and 16 attached so as to be in front of the eyes. The mirrors are made of thin glass approximately 1/8 inch thick. The glass is coated with a Cromium Cobalt coating or similar to give it a mirror surface. This mirror is on the first surface of the glass not the back surface as most house hold mirrors are. This first surface mirror prevents shadows from clouding the visual image. First surface mirrors can also be made from plexiglass. Details of the construction of the optical viewing apparatus may be seen by referring to FIGS. 2-4. 
     In FIG. 3 the optical viewing apparatus includes a frame 9 which mounts a pair of rectangular mirrors 15 and 16. The frame 9 can be mounted to a pair of glasses 22 in a removable fashion by clipping them to the frame as shown at 10. In FIG. 6, 31 is a bridge of polypropylene that is flexible yet has memory. Hence 31 is like a hinge allowing arm 30 to be flexed one quarter of an inch, and when flexed maintains a pressure which allows frame 9 to hold on to glasses. Frame 9 in FIG. 6 clips over glasses with arm 30 being on the inside of the glasses and arm 34 being on the outside of the glasses as seen in FIG. 3. The frame 9 may be made of injection molded polyproplene for its light weight and strength. 
     In FIG. 5 the mirrors 15 and 16 are mounted to the underside of a visor, 11. 
     FIG. 2 is a view of the head of person 6. The persons eye 14 is looking ahead but slightly down into the mirror 15. Then the line of sight, shown with a dotted line, will reflect off mirror 15 up to mirror 16 which will again reflect the line of sight this time downward. This would enable a person to read from off the table top while keeping the head erect. 
     In FIG. 3 the frame 9 which holds the mirrors 15 and 16 allows adjustment of the mirrors in a rotating manner at the attachment points 18 and 19, and 20, 21. Adjustment is possible because frame 9 has a round male projection on the end of each arm that fits into a female depression made by injection molding which is mounted to each end of mirrors 15, 16. This would allow adjustment of the mirrors 15 and 16 to provide different line of sight angles over a 45 degree angle. That way the eye 14 could look straight ahead into mirror 15, or may look down forty five degrees into mirror 15. This would provide different fields of view and a personal comfort adjustment. 
     While a particular embodiment of the mirrors 15-16 and the frame 9 have been illustrated and described such is not intended to limit the scope of this invention. Modifications and changes will become apparent and the scope of the invention is to be limited only by the appended claims.