FAQs
Overview
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FAQs :: Overview
                                 Frequently  Asked  Questions
Should I still have a writing table in my exam room?
You can, but the RUSH ET-549 is designed to handle all of the equipment you may need in a typical examination room.  The writing table slides out conveniently between the patient and doctor.  Plus, as you face the patient, the writing area is conveniently where your right hand is.  The ET-549 also is available as a left hand unit.  The top drawer is designed to hold the typical trial lens kit.  The second drawer is perfect for miscellaneous hand held devices such as prism bars, occluders, filters, color tests, pen lights and reading cards.

Will the ET-549 fit into a small exam room?
The dimensions of the ET-549 is: 20 inches deep and 46 inches long.  Therefore, it takes up much less room in the exam room than a typical classic examination stand.  The ET-549 will easily fit into a room as narrow as 6 feet wide and 12 feet long.  The width can be narrower because no writing table on the opposite side of the room.  The length of the room can be as short as 12 feet because with the computer monitor facing the wall at the end of the exam room, the effective length of the distance images is 20 feet.

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).

What is the best room lighting set up?
A main room lighting switch should be located behind where the patient sits, or behind the doctors chair.  If the instrument stand is located away from the rooms entry door, consider a three-way switch, where one switch is by the door and the other switch is located near the examination instrument stand.  Low room lighting is available on the top of the instrument stand light on the RUSH ET-549.  Keep in mind, the examination is performed with room lights on, not off as is done with the old projection system.

Why does  the RUSH ET-549  not need a electric chair?
With the classical examination chair and stand set up,  the stand does not go up or down.  Instead the phoropter and slit lamp are on articulating arms that move up or down by releasing a counterbalanced spring.  The range of movement up or down is usually no more than 6 to 8 inches.  Therefore, with this limited vertical movement, the only solution to dealing with a tall or short person, is to move the patient up or down in an electric chair.  The RUSH ET-549, solves this need for more vertical range by changing the stand so that it has up to 17inches of vertical movement.  This is enough to cover the range in height of most people so that the chair does not have to move up or down vertically.  That means that the chair can be any comfortable chair you chose.  A nice office chair with a range in cost of $100 to $200 is very adequate.  This is more comfortable for the patient.  No legs are dangling off a high chair, cutting the circulation off.  The doctor is more comfortable because the patient is at a height like a normal chair height.  The doctor is not required to sit high on a stool, leaned over, in order to reach the patient.  And finally, the wheel chair patient can easily roll up to the ET-549 and since the stand goes up and down, the phoropter and slit lamp can easily be adjusted to reach them.  

Does the ET-549 qualify for ADA Credit?
The RUSH ET-549 is the only examination instrument stand that is designed to fully meet Americans with Disabilities Act status.  Not only is the examination stand convenient for the disabled wheel chair patient, but it is perfect for the doctor who is in a wheel chair.  both doctor and patient can be in a wheel chair.  The ET-549 adjusts vertically to meet both of their needs.



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