Thomson Test Chart (Full Version)

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The Thomson Test Chart software turns a standard PC into a powerful and versatile Test Chart for Optometrists, Ophthalmologists, Orthoptists and other eye care professionals.

The software offers an unrivalled suite of test charts and vision tests for both distance and near vision testing. Simply install the software on your PC, mount a flat panel display on the wall, enter the screen viewing distance, perform a simple calibration and you have the Test Chart of your dreams!

Prof Thomson developed the first computer-based Test Chart in the early 1990s and released the first version for sale in 2000. Over 8000 eye care professionals in the UK alone now use the system making it the most popular computer-based test chart by miles!

The software benefits from over 20 years of research and development. While other companise have copied the concept, reviews consistently rate the Thomson chart as the most comprehensive and most intuitive to use.

A whirlwind tour of the Thomson Test Chart

Software only

£995.00 £1,194.00 (incl.VAT)

Complete Solutions

Testimonials ...

Other systems have attempted to copy the Thomson Test Chart but it is leagues ahead of the competition in terms of the range of tests and user friendliness

The days of back-illuminated and projector chart are numbered

The Thomson Test Chart is the single most important development in clinical vision assessment in decades

I can't imagine going back to a projector chart. The Thomson Test Chart has completely changed the way I practice.

It is by far the most cost-effective way of giving your practice a high tech feel. Patients walk straight past my OCT but are amazed by the clown who sticks his tongue out!

We put the Thomson Test Chart into our hospital eye clinic 5 years ago. The nurses love it and we find that we get far more reliable visual acuity measurements.

We tried a Japanese short-form chart for a while but the refraction results were not reliable so we swapped to the Thomson Test Chart. It is 100 times better and with a mirror I had no problem installing it in my small consulting room.

A more detailed look at the features ...

View full on-line manual for the Thomson Test Chart 

Snellen charts: 12 different optotypes can be displayed in the traditional  Snellen format including British, Sloan, Sheridan-Gardner, Landolt Cs, Tumbling Es, Kay pictures, Numbers, Gujarati, Punjabi, Arabic and Hebrew. A single row or column can be shown and a range of cursors are available to isolate specific letters or rows.
LogMAR charts: The LogMAR chart is a superior design to the Snellen chart and has been used in research laboratories for many years. An increasing number of clinicians are making the switch and it is likely that this chart format will become the standard in years to come. A wide range of optotypes can be displayed in LogMAR format. A single row or column can be shown and a range of cursors and available to isolate specific letters or rows
Single letter charts: It is sometimes easier to show a single letter, particularly when testing children and those with learning difficulties. The size of the letter can be changed in 0.1 logMAR steps and crowding bars can be added. A wide range of optotypes can be displayed in single letter format.
Contrast sensitivity: This chart is similar to the Pelli-Robson test. Patients are required to read triplets of letters of decreasing contrast. The minimum contrast required for the patient to read 2 out of the 3 letters is recorded as the contrast sensitivity. This measurement is particularly valuable for patients with cataracts and various neurological conditions such as glaucoma.
Refraction targets: A range of targets are included for use during the cross-cylinder test. Targets include rings and dots of different sizes, which may be shown singly or in pairs.
Fan and block test: The fan and block test remains a useful test for identifying and correcting astigmatism.
Duochrome tests: The duochrome test provides a rapid method for assessing patients’ refractive status. Test Chart 2016 allows various targets and optotypes to be presented against a duochrome background.
Phoria tests: Test Chart 2016 includes a unique set of targets for use with the Maddox rod.
Associated Phoria tests: The patient views the bars through the red/green spectacles provided. The bars are moved until they appear to be aligned and a measure of the associated phoria in prism dioptres is displayed on the screen.
Fixation disparity tests: Test Chart 2016 includes a specially designed fixation disparity test which requires the use of red and green spectacles (provided). The unique design ensures good binocular lock and stable accommodation.
Worth 4 dot test: The Worth 4 dot provides a quick check for suppression. In this implementation the patient wears red / green spectacles (provided) and is asked how many dots they can see. 4= binocular, 3 = Left suppression, 2= Right suppression
Stereopsis: At last – a distance stereopsis test. Use random dot stereograms to asssess stereopsis. Dynamic generation of stereograms allows the disparity of the images to be adjusted to provide an accurate assessment of stereopsis. Generate shapes or letters in depth.
Vernier acuity: has been shown to be useful in assessing the potential vision of patients with cataracts. Simply measure the minimum displacement required for the patient to detect that the two bars are mis-aligned.
 XPClown Fixation targets: Test Chart 2016 includes over 200 different images for fixation including photographs, cartoons and a selection of spots and crosses. The images are arranged in groups and a slide-show of the images within a group may be shown during retinoscopy or ophthalmoscopy for example. Add your own images by simply dropping them into a directory.
Task images: Patient having problems seeing the TV or reading teletext? Why not show them these images on the test chart. Use the task images supplied with Test Chart 2016 or add your own images by simply dropping them into a directory.  0008 SkyMenu
  UK number plate tests: The “number” plate test remains the only statutory test of vision required for driving in the UK. Test Chart 2016 is capable of exactly replicating a series of front and rear number plates using the exact fonts and character spacing. The number plates can also be presented against a variety of backgrounds to simulate real world conditions.
LogMAR scoring utility: Simply record the number of letters correctly read on each line and let the utility work out the LogMAR score and the equivalent Snellen acuity.  
  Stopwatch and Timers: A number of clinical tests require timing.  Test Chart 2016 introduces a handy set of timing tools for use in the consulting room including a Stopwatch, a Coundown timer and a Metronome.
Contact Lens fitting tools: Test Chart 2016 incorporates a powerful set of contact lens fitting tools to help with those tricky contact lens-related calculations.  
  Efron images: Test Chart 2016 includes the complete set of Efron images for grading contact lens related complications.
Tablet interface: Test Chart 2016 introduces a two way link with a variety of tablets and smartphones including the iPad, iPhone and most Android devices to provide a powerful interactive remote control for the Test Chart and a huge range of near vision tests.  
  Interactive remote control: Test Chart 2016 can link to a tablet to provide a fully interactive remote control.  A thumbnail of the current test chart screen is shown at the top of the display and running a finger over it causes a pointer to move across the main test chart.  All display modes and options can be selected from the tablet.
Using a phone as a remote control: Test Chart 2016 can also link to most smart phones including iPhones and Android phones,  The remote control interface is automatically optimised for the smaller screen.  
  Near vision testing on a tablet:  Modern tablets are ideal for near vision testing, being light enough for the patient to hold and having the resolution to reproduce small test stimuli. Conventional near vision testing apps like the Vision Toolbox for the iPad (Thomson Software Solutions) provide a huge range of near vision tests and stimuli.  However, changing from one test to another requires the clinician to interact with the tablet which reduces the efficiency of this approach.
Test Chart 2016 provides a novel solution to this problem by using a PC to generate the stimuli which are then displayed on the tablet.  This approach has all the advantages of using a tablet but uses a PC to control the display.
Test Chart 2016 provides a wide range of near vision tests when connected to a tablet.  The patient is handed the tablet and asked to hold it at an appropriate distance. The practitioner can then change the vision tests remotely from the PC.  
  Near acuity tests: Test Chart 2016 includes a range of near vision acuity tests including a LogMAR reading chart, single row reading test and a conventional Test Type test.  The text displayed can be edited and new text added.  The colour and contrast of the charts can be changed at the click of a button.
Near vision tasks: One of the purposes of near vision testing is to ensure that the patient can perform certain near vision tasks like reading a directory of seeing the time on a watch.  Test Chart 2016 can display a wide range of images on a tablet screen to simulate these tasks.  The magnification of each image can be varied and new images can be readily added.  
  Near vision binocular vision tests:  Test Chart 2016 includes a wide range of binocular vision tests including phoria, fixation disparity and stereopsis tests. The patient wears red/green visors to dissociate the images for each eye.
Near vision stereopsis:  Test Chart 2016 can display random dot stereograms and a variety of red/green anaglyph images to assess stereopsis. These are generated dynamically allowing the stereo depth to be varied to assess stereoacuity thresholds.  
  Amsler charts:  The Amsler chart is designed to detect disturbances within the central visual fields associated with macula disease. The patient is simply instructed to look at the red cross in the centre of the grid and report if all the lines in the grid look straight and if any areas in the grid are feint or missing.Test Chart 2016 allows these areas to be indicated by “drawing” directly on the grid using a finger on the tablet. This image may then be placed in the Windows clipboard by selecting Edit … Copy from the menu at the top of the screen. The annotated grid can then be pasted into a word document, patient management software etc.

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