Landolt: Interaction Issues

[bastianilso]

• It is not clear how you complete Calibration Step 2, and as a result we havent tested Calibration step 3 or 4 properly.
• There is a menu appearing for 10ms flickering when moving the landolt Cs and confirming the outmost acuity point.
• UI doesnt scale properly, organized in a lot of random layers, and it is unclear what controls are used by the Landolt test.

[bastianilso]

TODO from Code:

    // TODO: Add better text explication for operator and patient for instruction
    // 1. Let the user choose the size of the Landolt checked
    // 2. Let the user confirm positions 
    // 3. Set the position to center
    // 4. Move the target slowly to have a smooth poursuit on the current axe
    // until the FOV limit is reached (patient with touchpad/operator with arrow)
    // 5. press space bar or trigger to stop the movement and change the Landolt C orientation
    // 6. The patient or operator moves the target closer to the center until the patient can detect the opening direction
    // 7. ask the patient to press the touchpad in the good direction (add visual help around the Landolt C simulating the touchpad)
    // if the patient pressed direction is good,
    //      if was the last axe, then proceed to result, draw the acuity field.
    //      else set the current axe to the next one and start to step 3.
    // else go to step 4.