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FAQs :: FAQ's
Where is the best spot to place the monitor?
Historically, we have always projected our test images onto the end of the exam room wall.  Sometimes this has been done with use use of several front surface reflecting mirrors.  As such, we tend to think that the monitor should be hung on the wall.  On closer analysis there are two main reasons that the monitor should NOT be at the end of the room but rather placed near the instrument stand so it can be turned in front of the patient for:
a) Near and intermediate vision and binocularity testing.
b) Patient education on vision and eye disease (EyeCyclopedia).
c) Patient education on your office website (such as how to order contacts on
     your office website).

Additionally, with the monitor on or near the instrument stand, it can easily be turned around to face the wall and viewed with a simple mirror.  The images are reversed so they appear forward.  A 12 foot examination room can test as a 20 foot examination room.  Take that last eight feet off the length of your room and turn it into a pre-test or special testing room. (See RUSH Instruments: ET-203N, ET-403 or ET-404).

Is the typical flat screen monitor bright enough when facing the mirror?
The typical flat screen monitor has consistent brightness typical of a TV set.  We all look at TV's from across the room with room lights on.  Therefore, leave the normal bright room lights on during your examination.  The monitor does not depend on reflected light like the old classical projection system.  The monitor has its own internal illumination.  This is of particular help as the doctor trys to read the numbers on the phoropter.  With full room illumination, there is no problem seeing the numbers.  Additionally, the monitor has crisp digital resolution rather than fuzzy TV resolution.  The SimulEyes software is designed in vector graphics, which means that no matter what size the image is, it has absolute sharp borders.

What type of mirror should I use?
A medium quality standard mirror is perfect.  Historically, the main reason front
surface mirrors are used, is that between the angle of the projector and the
multiple reflections back and forth, a ghost image can be viewed by the patient. 
Here, a front surface mirror is not needed because the patient is looking straight
into the mirror.  The angle of the reflective effect of the glass compared to the
mirrored surface on the back of the glass is very small.  However, when
purchasing a mirror, look for distortion free glass.  When testing the mirror, hold
it 10 to 15 feet away and view yourself in it.  Move back and forth to select a
mirror with the least distortion.  If you purchase a RUSH ET-549,  a quality mirror
is included.  The mirror has hinges which makes it easily adjustable.

What size should the monitor be?
The length of the room is the deciding factor.  As a rule of thumb, a 15" monitor works well for a 10 to 13 foot long room.  A 17" monitor is best for 13 to 15 foot long rooms.  A 19" monitor is best for 16 to 20 foot long rooms.  The reason a larger monitor works best when the mirrored wall is further away is that the reflected image must be adjusted to meet the required snellin standards.  As the image is adjusted, the image becomes larger as the distance increases.

What is the ideal room length?
If you are designing new examination rooms, a 12 foot room is ideal.  Longer really does not accomplish anything useful.  If your rooms are longer, our system still works OK, but there is no advantage.  If you have 20 foot exam rooms, take 6 feet off of the room and make it into a storage room or add it to another room for some other purpose such as a pre-test room (see the benefits of the RUSH ET-203, rotary pre-test instrument stand).

Does SimulEyes come with a remote keypad?
Yes,  however because SimulEyes has such a large number of images available, a hand held keypad is limiting.  Keys are available on our wireless and the infrared keypad for some of the main images.  What we have found is that after a period of time, most doctors discover that a regular keyboard is much more versatile than a keypad.  If you purchase a wireless keyboard, such as those made by LOGITECH, the flexability and options are so much greater that you will soon discard the keypad.

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