There are several well-known health issues associated with working at a computer and hence with studying online. In particular, it is known that working at a computer can result in the following health issues:
Eye strain: Working at a screen causes you to stare more intently at a small area than you would under other circumstances.Upper limb disorders: These are sometimes referred to as RSI (repetitive strain injury).Headaches: Some people report headaches after working at a screen for a long period.Stewart-Marshall's insight:
This page deals with computer health and safety issues of online learning. In particular it demonstrates the need for a well designed computer workstation (with an ergonomic chair and ergonomic computer desk) and the need for a healthy work schedule.