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This allows the patient to work in an office environment and to read, use a VDU screen and look across the office to speak to colleagues.
Decisions as to which lens type to dispense should also be based on t fie patient's working distance, VDU screen height (or other work task), any possible distance vision requirements and the design of any existing PPL being worn.
Failing successful adaptation to, or use of, varifocal spectacles for VDUs, the presbyope may be advised to simply move their VDU closer to them, so that it is within their far point range.
Understanding how vision problems at near can affect both posture and efficient use of a VDU, should allow optometrists to assist both employees using VDUs and their employers, to make their staff and companies more efficient.
Transient myopia--distance vision blurred after VDU use
The extent to which individual VDU workers are likely to suffer from ocular symptoms will depend upon a number of factors including the state and health of their eyes, the design of the equipment, the design of the workstation and workplace, ambient lighting, glare, screen reflections, the nature of the work and the frequency of breaks.
Though most reports accept the occurrence of transient myopia, they discount the suggestion that viewing a VDU screen for prolonged periods can actually cause myopia.
The blink rate has been found to reduce during VDU use, leading to greater dryness and irritation of the eye.
Wherever practicable, VDU users should be allowed some discretion as to how they carry out tasks; individual control over the nature and pace of work allows optimal distribution of effort over the working day
A study carried out in Israel tested accommodation and convergence on VDU workers.
A survey of optometrists conducted by the American Optometric Association (AOA), who have labelled this condition "computer vision syndrome" (CVS), (18) indicated that 10 million primary eye care examinations are provided annually in the USA primarily because of visual problems associated with VDU use.
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