To perform the Hess or Hess-Lancaster examination we must place the red-green glasses on the patient, so we know which eye we are examining.

The different diagnostic positions of the gaze should be explored and the position of the patient's eye should be checked and quantified with the reference eye, in this way we will be able to establish if there is a correct ocular alignment or not.

We start by exploring the right eye, allowing the patient to move the red control. The green control is placed in the different diagnostic positions of the gaze and for each position, the patient is instructed to superimpose the red control over the green one, if necessary he/she can rotate the control (with the central Wheel of the mouse). The position in which the patient indicates that the red cue is exactly over the green cue is saved.

To explore the left eye, the patient is given the possibility to move the green guide, the red one being the reference guide.

To add a scan perform the following steps:

1.       Add or select the patient to be scanned (1).

2.       Press the "Scans" button in the "Patients" screen (2).

3.       Add a Scan by pressing the "+" button in the "Performed Scans" navigator (3).

4.       Save the data of the scan tab (4).

5.       When returning to the list of scans, make sure that the added scan is selected: it is highlighted in green. To make sure click on the corresponding row (5).

6.       Click "Scan". You will go to the scan screen (6).

7.       Perform the scan.

-          Press the eye to explore (7).

-          Selecting each point with the corresponding letter on the keyboard.

-          Each time the patient finishes a point, press the F12 key, thus saving the data. The corresponding key changes to red (8).

-          Do the same with the other eye.

8.       Display the result curtain (9).

If you want to repeat a point, 1 select the point to repeat and delete it.

Close the curtain.

Select the eye and repeat that particular point.

9.       Press Save (10).

10.   Press Accept (11).

It is ESSENTIAL that you first save and then accept. If you do not follow this sequence you will LOSE the scan data.