~~~ it is MOST IMPORTANT as age creeps up on some of us who may not realize they might have early stages of age-related Macular Degegeration, where our central vision is not as keen as it used to be and where we might have to practice the use of our surrounding vision.

Your chip happened to be an excellent example of how to study deep even by those who are pretty sure what Ivory looks like... because it can be tricky...