What is Computer Vision Syndrome (CVS)?

CVS is a condition resulting from focusing the eyes on a computer display for long, uninterrupted periods of time. Symptoms transpire since the visual strains of computer-related tasks go beyond the visual proficiencies of the person to carry out the tasks comfortably, in most cases.

Viewing distances and angles used for computer work are also different from those commonly used for other reading and writing tasks. This can place additional demands on the visual system as the eye focusing, and eye movement requirements are different. Special eyeglasses or lenses with implemented rebates could help abate the problem

CVS can a be a painWorkers of the age 25 to 45, in particular, may find adjusting to these work requirements difficult.

Important: Work that is visually and physically fatiguing may result in decreased work performance, increased error rate and is a source of worker discomfort and reduced job satisfaction


Vision problems experienced by PC users are generally only temporary and will cease after stopping computer work at the end of the day. Some users may, however, experience prolonged effects such as blurred distance vision and headaches after work. It is vital to address the cause of these problems, as continual uncorrected visual fatigue may worsen with extended computer use.

Common symptoms include:
  • Eyestrain
  • Fatigue
  • A headache
  • Blurred or double vision at a distance and/or near
  • Dry or irritated red eyes
  • Loss of concentration
  • Increased error rate
  • Worker discomfort
  • Reduced productivity
  • Reduced job satisfaction


It is important that there are no underlying vision problems, as even a minor problem can significantly affect worker comfort and performance at a PC.

Normal specs or contact lenses designed for fashion purposes may not provide adequate correction for computer work. Specific occupational lenses prescribed to meet the unique demands of computer work may be indicated. Specific accommodative support lens designs and high-performance HDV lens coatings can help to maximize visual concentration and clarity and reduce visual fatigue and discomfort.