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Computer Vision
Computers and visionComputer work
is very demanding on
your visual system
Visual symptoms include• Headaches• Sore, tired eyes• Watery or dry
eyes• Blurred vision
Dry Eye• Inadequate tear cover on cornea• Common in computer users
(due to less blinking)• Common in air conditioned
environments• Tear supplements can be used
Comfortable vision• Regular visual breaks when working• Work station set up• Treatment of any focusing problems• Correction of refractive error
Computer work station set up• Screen should be easy
to focus on • Monitor height
– top of screen below eye level
– bottom of screen can be read without leaning forward
To reduce screen glare• Place monitor to the side of light source (not
underneath)• Tilt screen• Anti glare cover• Adjust brightness, contrast (eg dark
characters on a light background)• Anti-reflective coating if you wear glasses
Visual problems can be caused by• Uncorrected refractive error• Focusing problems• Problems with eye health
Refractive errors• Light entering the eye does not focus
exactly on the back of the eye• Short-sightedness, long-sightedness
and astigmatism, presbyopia• Can be corrected with glasses or
contact lenses
Diagram of an eye
Normal focus
Short sightedness (Myopia)Distance vision blurry, near vision usually ok
Short sighted focus Short sighted correction
Long sightedness (Hyperopia)Difficulty seeing clearly and comfortably up close
Long sighted focus Long sighted correction
Astigmatism• The eye is shaped more like a
football than a basketball• Focusing error that causes blur
in one direction
Presbyopia• Begins from age 40 onwards• Small print is clearer if held further
away• The lens inside the eye is less flexible• Glasses for reading restore close vision
Focusing problems• Accommodati
on• Vergence• Binocular
vision
Problems with eye health that may cause visual symptoms• Diabetes• Hypertension• Age-related conditions
– Cataract– Age-related macular degeneration– Glaucoma
Your eyes need to be examined regularly• No referral is required• Eye examinations attract a Medicare rebate• Find your local optometrist at
www.optometrists.asn.au
Optometrists• Provide a comprehensive visual
examination• Detect and diagnose eye health problems• Prescribe and supply glasses and contact
lenses when required• Diagnose and treat eye coordination and
focusing problems