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CITYCITY VisualVisual SystemsSystems

Drivers Vision Screening•Overview of the System

• The Administrator

• Eye Problems

• Vision Screening The QuestionnaireExplanation of the Tests Results and Report

• Administration

For help or more information phone 020 8559 0800 www.cityvisual.com

© CITY Visual Systems 1989 - 2012

CITY Vision Screener for DriversCITY Vision Screener for Drivers


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Overview of Vision ScreenerOverview of Vision Screener

Software package to test the vision of Drivers

• Does not replace a full eye examination performed by an optometrist.• The Driver still has their legal obligations to the DVLA and Police.

• It performs a comprehensive test of vision.• It does NOT perform a full visual fields test.• A Test takes about 4 minutes to complete.• Used on Standalone PC’s, Laptops, or via the network.• Results stored, analysed and a report generated.



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The AdministratorThe Administrator

•As an administrator you are not expected to have any knowledge of the eyes or optometric practices, if someone wants this specialist information please refer the request to us.

•You are expected to be able to:

Set up the computer and position the targets.Calibrate the screen.Measure the test distances.Perform the Drivers Screening correctly andhave a knowledge of each test and its instructions.

•If you are unsure on the running, instructions, tests etc or if you are failing a large number of drivers (more than one in ten) please contact the support line.



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© CITY Visual Systems 1989 - 2012 4

Eye ProblemsEye Problems

Do eye problems result from Driving?

• Yes, but not necessarily more than similar visual tasks.

•Other factors contribute to or may cause ‘eye problems’, these include:

Lighting – Dusk/Dawn, Fog, Rain, Snow and Sleet.

Posture.

Tiredness.

Environment.

Some types of medication.

Existing weakness with vision.

• Age is important and symptoms include blurry vision and especially at night with

halos and extended recovery time from the effects of dazzle increase with age.

• Contact lenses and Multi/Varifocal glasses can cause their own special types of

problems.


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QuestionnaireQuestionnaire

The Vision Screener starts with a series of simple questions, over a few screens, gathering information to be used in the programs decision process.

Personal information, age, sex, when was the last eye examination;– Driving type– Visual Problems / headaches experienced whilst driving

This information is important.


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The TestsThe Tests

The tests are randomised where possible to avoid improvement by ‘learning’ the sequence of letters or position of targets.

Comprehensive range of tests

• Amsler Chart to be completed at 50 cms.• Visual Acuity to be completed at 1 metre.• Optionally there is a Number Search task at 1 metre.• Eye Co-ordination to be completed at 1 metre.• Peripheral Vision to be completed at 1 metre with wall targets.• Distance Acuity to be done at between 3 and 4 metres from the

screen.


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Amsler ChartAmsler Chart

• This test is done at 50 cms. Suggest that the driver rests his elbows on the table.• Checking the central area of vision for blind spots, astigmatism, or other problems

with eyes, brain and the visual system.


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Visual AcuityVisual Acuity

• This test is done at 1 metre. Ask the driver to sit back.• Helps to determine if the driver can see the dash board clearly. • Starts with the smallest detail that can be displayed on the screen. Gap starts at 1

pixel.• Broken square is displayed in one of four directions.• Size increases when error(s) are made. • Each eye is tested, then both eyes.


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Eye Co-ordinationEye Co-ordination

• Use the Red and Green Filter (red to right). Don’t worry if you use them the wrong way round.

• Measures how well the user can compensate for any muscle imbalances. Linked to symptoms such as double vision and headaches.

• Tiredness, stress, some drugs or alcohol can make this test more difficult.• Some drivers may say that one line is more dim, or not as sharp, or flicking on then

off. Please ask them if the lines are approximately straight with each other.


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Peripheral VisionPeripheral Vision

• This test is beyond the legal requirements, however it is used to demonstrate how well, we can see “out of the corner of the eye”.

• Place the letter fixation targets on the walls at 60° and 90°on the right and left, using the measuring card supplied. Make sure that you align the letters from the drivers viewing position.

• When performing the test don’t allow the driver to sit back.• If their spectacle frame gets in the way, then this shows that they may be

inappropriate, resume testing without them.• The answers are Nothing, Shape and Flashing.• If they correctly identify the shape then ‘press’ shape.• Most people can identify the type of shape at 60°, but only if there is something

flashing at 90°.


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Distance AcuityDistance Acuity

• This test compares the measured acuity to the legal requirement.• The supervisor must measure a mark a distance from the screen, preferably

between 3 and 4 metres, no more than 6 metres. The driver must stand at this mark and attempt to read the letters.

• Letters are randomised and start with the smallest letters displayed.• If glasses are normally worn, the first part tests each eye without the glasses.• You should press the 5 Wrong button until they can see the letters.


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Test ResultsTest Results

• At the end of the tests, the results are automatically saved to disc before being displayed.

• The Report should be printed at the end of the screening. 2 copies are printed for signing by the driver. One for the driver and the other for your records.

• Reprints can be made through the Administration (File View and Print Area).


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ReportsReports

A copy of this report must be signed and dated by the Driver to be held in the Personnel File.


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AdministrationAdministration

System setup – NOT TO BE USED Print Forms – NOT TO BE USED. File View and Print - to look at results of screenings, print reports or export data for

management statistics.


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File View and PrintFile View and Print

Select a record and press View to look at the results and recommendations.

Once the record has been highlighted you can print the User’s Report. Tick User’s Report in the bottom left-hand box. The Print button can then be used.


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CITY Visual Systems

Tel 020 8559 0800

www.cityvisual.com

[email protected]


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