A discrete monitor comprises a visual display, support electronics, power supply, housing, electrical connectors, and external user controls. The display in modern monitors is typically an LCD with LED backlight, having by the 2010s replaced CCFL backlit LCDs.
The effect of visual display unit use on. accommodation is disputed. Some studies.CL: contact lens, DES: digital eye strain, VDU: visual display unit.
Discover the best practices for optimizing Visual Display Terminals to reduce eye strain and improve visual comfort, enhancing overall vision health.

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Three different types of spectacle lenses, specially designed for visual display unit (VDU) work, were compared with single-vision lenses regarding postural load.
Visual display unit strain can cause a range of health issues, including eyestrain, back pain, and repetitive strain injuries (RSIs). Prolonged VDU use can lead to musculoskeletal disorders, and digital eyestrain can cause symptoms such as dry eyes, headaches, and difficulty focusing.

Springer, T.J., "Visual Display Units in Office Environment", Proceedings of Symposium, Tufts University, May 1980. Steward, T. , "Problems Caused by the Continous Use of Visual Display Units", Lighting Research and Technology, Vol 22, No 1, 26-36, 1980.