Test Chart Full

The LogMAR chart has rapidly become the test format of choice for clinicians. The Thomson Test Chart includes a huge range of options for LogMAR charts including ETDRS, Linear, Crowded Linear, Column etc. LogMAR charts are available in 12 different optotypes including Sloan, British, Kay, Tumbling E, Landolt C, Makaton, Sheridan Gardner and in a number of different language fonts including Gujarati, Arabic, Punjabi and Hebrew.

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.

It is sometimes easier to show a single letter, particularly when testing children and those with learning difficulties. The size of the letters 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.

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.

A wide range of targets are included for use during refraction. Targets include rings and dots of different sizes and rows of characters. Additional tests are available if a polarised monitor is used.

The fan and block test remains a useful test for identifying and measuring astigmatism.

The duochrome test provides a rapid method for assessing patients’ refractive status. The Thomson Test Chart allows various targets and optotypes to be presented against a duochrome background.

The Thomson Test Chart includes a targets for use with the Maddox rod.

The patient views the bars through the red/green visor 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.

The Thomson Test Chart includes a range of fixation disparity tests. Red/green dissociation is used for non-polarised monitors while cross polarisation is used for polarised monitors.

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

The Thomson Test Chart includes a distance random dot stereogram tests. 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.

Test Chart FULL 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 and videos if required.

Test Chart 2020 includes a range of task images which simulate very screens and tasks that they may be called upon to read in everyday life. Sky menu, arrival board, sub titles, clocks – to name but a few.

The “number” plate test remains the only statutory test of vision required for driving in the UK. Test Chart 2020 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.