Occupational Screener

Occup Screener

A radical new solution for Occupational Vision Screening

The Occupational Screener software is set to revolutionise vision screening in companies and industry.

The software runs on a standard PC or Laptop and performs a wide range of vision tests including: Distance LogMAR accuity, Distance Snellen acuity, Number plate test, Distance binocular vision, Near visual acuity, Near binocular vision, DSE vision, Stereopsis, Colour vision, Visual fields and Amsler. The software is also capable of creating on-screen questionnaires to gather information about symptoms and history (and virtually anything else).

The tests may be run individually or grouped into a protocol for screening specific groups of people. A pass/ faill criterion can be set for each test allowing the screener to rapidly identify those inviduals who fail to meet a minimum standard.

The software includes a powerful database and report generator to manage much of the back-office administration associated with screening.

Key features

  • Software runs on most PCs and laptops running Windows 7 or later
  • Rapid and accurate assessment of a range of visual functions including:
    • LogMAR visual acuity
    • Snellen visual acuity
    • UK Number Plate test
    • Distance binocular vision
    • Near visual acuity (using printed chart)
    • DSE test
    • Near binocular vision
    • Stereopsis (depth perception)
    • Ishihara Colour Vision test (requires Ishihara book)
    • City University Colour Vision test (requires City University book)
    • Visual fields
    • Amsler test
  • Includes powerful questionnaire module to generate and apply questionnaires to acquire information about employees.
  • Tests may be run singly or as part of a protocol
  • Pass/fail criteria can be set for each test to check compliance with relevant standards
  • Powerful database
  • Report generator to produce attractive printed reports or pdfs
Occup Screener 1
OS LogMAR 1

A more detailed look at features

What is the Occupational Screener?

Until now, screening vision in industry required the use of an instrument known as a Vision Screeners.  These instruments use an optical system to simulate different viewing distance and present a variety of "slides" to assess different aspects of vision. The instruments are bulky and expensive and often include non-standard tests of vision which are crude and difficult to reconcile with other clinical tests. The recording and reporting of the results with these instruments is entirely manual.

The Thomson Occupation Screener is the product of two years of research and development under the direction of Professor Thomson.

The result is a computer program which will run on most PCs and laptops and is capable of measuring most of the aspects of visual function relevant to occupational vision screening.

The software contains a powerful database and report generator allowing appropriate pass/fail criteria to be applied to test results and detailed reports to be printed or saved as pdfs.

The software is available for a monthly subscription of £45+VAT which includes training, updates and full support.

Who is it for?

The Thomson Occupational Screener is designed for Occupational Doctors and Nurses, Opticians or indeed anyone who is responsible for vision screening in industry, offices or any other environment.

It is simple to use and manages much of the backoffice administration associated with Occupational Screening.

The software can be configured to include industry-specific test protocols, applying a certain set of tests and pass/fail criteria which are relevant to the tasks carried out by different employees.

The software can be used with minimal training and screening is accurate, quick and efficient compared with conventional methods.

Call now for an on-line demonstration

Single tests

The Thomson Occupational Screener allows the examiner to present a single test (for example Snellen Acuity) and record the result.  Multiple tests can then be selected and included on a single report.

Alleternatively, any combination of tests can be grouped together to form a protocol ...

Dashboard

The Thomson Occupational Screener includes a dashboard allowing the examiner to view summary statistics relating to the tests that have been conducted.

Protocols

The Thomson Occupational Screener allows any combination of tests to be grouped together to form a protocol. Furthermore, each test can be given its own pass/ fail criterion.

This allows the examiner to design protocols for sepcific groups of employees, for example DSE users, fork lift truck operators, HGV drivers etc.  The results of all the tests in the protocol are included in a single report.

 

LogMAR visual acuity

LogMAR acuity has become the "gold standard" way of measuring visual acuity and is rapidly replacing Snellen acuity in most clinical scenarios. The Thomson Occupational Screener fully conforms to LogMAR standards.

During the test, the employee stands at a pre-determined distance (2.5-6 metres) from the computer screen and is asked to read the letters on the screen.  The letters are carefully scaled to take account of the screen size and the viewing distance. The examiner has to simply record the number of letters read correctly. The letter size is then varied according to a staircase algorithm to determine the exact LogMAR acuity.

OS LogMAR 1
OS Snellen 1

Snellen acuity

While LogMAR acuity is becoming the preferred method for measuring visual acuity, Snellen acuity is still required for a number of occupational standards.

The Thomson Occupational Screener will reproduce a standard Snellen chart on a computer screen (scaled to take account of screen size and viewing distance (2.5-6 metres)).

The employee is required to simply read down the Snellen chart in the normal way until they can no longer resolve the letters. The examiner can randomise the letters to avoid the patient simply memorising them.

The examiner records the Snellen acuity and any other notes relating to the test.

Number plate test

In the UK, drivers must be able to read (with glasses or contact lenses, if necessary) a car number plate made after 1 September 2001 from 20 metres.

Drivers must also meet the minimum eyesight standard for driving by having a visual acuity of at least 6/12 measured on the Snellen scale (with glasses or contact lenses, if necessary) using both eyes together. Additional standards apply for lorry and bus drivers.

The Occupational Screener includes a Driving Vision test which simulates the first part of this standard.  An exact replica of a number plate (suitably scaled for screen size and viewing distance (2.5-6 metres) is displayed on the screen.  The examiner simply records the number of letters/numbers correctly read.

OS Driving
OS BV Dist

Distance Binocular Vision test

The Thomson Occupational Screener includes a fixation disparity test to assess distance binocular vision.  Fixation disparity has been shown to be an excellent indicator of the presence of significant problems with binocular vision.

The employee views the screen from between 2.5 and 6m through red/green glasses (so that one eye sees the red marker and the other sees the blue marker).  They are then required to report if they can see both lines and if they are in a straight line.

Near Visual Acuity

The measurement of Near Visual Acuity requires a chart with very small text. The current generation of computer screens is unable to accurately reproduce text that is small enough.

Therefore, for this test, the employee looks at the printed near chart provided while the results of the test are entered into the software so that the results can be included in the analysis and the report.

 

OS Near VA
OS DSE

DSE test

Assessing the vision of those working with DSE has become an important part of the role of many Occupational Nurses.

The Thomson Occupational Screener presents text of decreasing size on the computer screen.  The employee is required to rate the ease/comfort with which they can read the text and the software calculates an overall score for the test.

Because the test conditions closely match the employees' normal working conditions, the results have been shown to be an excellent indicator of DSE-related eye problems.

Near Binocular Vision test

The Thomson Occupational Screener includes a fixation disparity test to assess near binocular vision (a scaled down version of the test for Distance Binocular Vision.  Fixation disparity has been shown to be an excellent indicator of the presence of significant problems with binocular vision.

The employee views the screen from their normal reading distance through red/green glasses (so that one eye sees the red marker and the other sees the blue marker).  They are then required to report if they can see both lines and if they are in a straight line.

OS Near BV
OS Stereopsis

 (Stereopsis (Depth Perception) test

The Thomson Occupational Screener uses random dot stereograms to assess stereopsis (depth perception).

The employee looks at four patterns on the screen through red/green glasses.  If the employee has stereopsis, a shape will be seen to stand out from one of the patterns. If the shape is identified, the task becomes more difficult and the process repeated to estimate the standard of stereopsis.

Ishihara test

Approximately 8% of males and 0.5% of females have a colour vision deficiency. This means that they have difficulty differentiating between certain combinations of colours. As colour is used extensively in the workplace, many occupational standards require a test of colour vision.

Colour vision testing requires very accurate reproduction of colours which makes it difficult to perform a colour vision test on a normal computer screen. Therefore, for this test, the client looks at a standard printed Ishihara book while the results of the test are entered into the software so that the results can be included in the analysis and the report.

OS Ishihara
OS City Test

City University Colour Vision test

Approximately 8% of males and 0.5% of females have a colour vision deficiency. This means that they have difficulty differentiating between certain combinations of colours. As colour is used extensively in the workplace, many occupational standards require a test of colour vision.

Colour vision testing requires very accurate reproduction of colours which makes it difficult to perform a colour vision test on a normal computer screen. Therefore, for this test, the client looks at a standard printed City University Colour Vision test book while the results of the test are entered into the software so that the results can be included in the analysis and the report.

Visual Fields test

The Thomson Occupational Screener includes a powerful multiple-stimulus supra-threshold visual fields test.

The employee looks at a red cross in the centre of the screen and reports the number of "dots" that they see. The dots appear in patterns of 2,3 or 4 dots in different parts of the screen and are flashed on for approximately 100msecs.

In order to extend the area of the field that can be tested, the red cross is moved to the four corners of the screen at various stages during the test.

If the employee's response is incorrect (e.g. they report that they see 3 dots when 4 were presented), the dots are presented individually to identify the dot(s) that was/were not seen.

NOTE: This test is designed to identify significant field defects and should not be seen as an alternative to a full visual fields test conducted by an Optometrist or Ophthalmologist.

OS Fields
OS Amsler

Amsler test

The Amsler test provides a quick test of an employee's central visual fields.

NOTE: This test is designed to identify significant field defects and should not be seen as an alternative to a full visual fields test conducted by an Optometrist or Ophthalmologist.

The employee looks at a grid pattern on the screen and is asked to report if any parts of the grid appear to be faded and if all lines appear to be straight and regular.

Questionnaires

The Thomson Occupational Screener includes a powerful utility for designing and presenting questionnaires. The results of the questionnaire may then be included in a report with colour coding providing a quick way of identifying any responses which may require further action.

OS Quest 2