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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