The forced choice situation needs gentle prodding. We usually do a binocular exercise run and then test the two eyes separately. This is lower than routine clinical standards and will seemingly increase acuity values. Still, psychophysically it is best to put threshold at the steepest point of the psychometric function. I have implemented flanking stimuli to provoke crowding.
Standard monitors are fine at distances of several meters.
This helps to keep your customers happy. Somehow I didn't like this in the contrast task, so free trials are only used in acuity measurement. About Tells you the version number etc. Mainly useful if you want to look at the interaction of contrast and acuity. The tabulator key can be used to step between numeric entry boxes.