If the patient has issues successfully completing the Bells test, can they achieve any level of success if the grid was less chaotic? Create a difficulty scoring system and progression to success.

Are the icons abstract or confusing? Learning how to meet the standard can be done progressively and helps the patient recognize the actual goal of the general test concept.

As your patient gets more accustomed to the test, you are able to add more random patterning.

Does the patient lose regions of vision as the field expands? Can you stack the targets more in one region to help the patient recover that vector of vision? Sky's the limit in software.