Increased use of computers in our life has led to the evolution of ergonomy, which is a science of designing equipment to reduce physical problems and fatigue. Sedentary jobs leave people with a host of physical ailments, which is why this science has become very popular. Generally, ergonomics is related to designing of computer desks and chairs.
General Desk Set Up
The ergonomic desk must be at the same distance from our eyes as to the monitor so that there is no need to move neck forward or backward or change inclination to view the monitor. These desks are positioned to maintain proper distance and height between monitor and eyes.
The office furniture especially the ergonomic chair height must be such that your feet can be flat on the floor. Now this height is an ideal height for every type of ergonomic chair. Adjust the height of your chair using a seatpan, up to your knee cap and then place your feet flat on the floor.
The desk position must be such that you are comfortably eying your monitor at eye's level and the desk height is balanced with your chair height.
The area on you desk consists of various accessories like keyboard, writing equipment, phone extensions, books, pen sets, files, and various other frequently used items. Ensure that your phone is on your less active hand side.
This ensures your less used hand also gets to do some tasks. Place all your accessories on the desk at hand's reach so that you don't have to unnecessarily stretch every time you need some of the things for carrying out your work.
As such there are no strict rule for ergonomics. Although, it's a science, its basic premise is comfort of the user. Now, there can't be set rule of comfort for everyone. If you're comfortable with a particular setting, then you are free to use that.
The bottom line is to avoid physical strain on any of your body parts especially your eyes and neck. What works for someone, may not work for the other, so be flexible. Nevertheless, don't let physical tension build in your body after working for long hours.