Self-tonometry devices - which is the best?

Hello everyone,

My name is Jennifer. I am 41. Relatively healthy - average weight range, no other (known) medical issues. I am severely myopic, and my father (now 75) has glaucoma (also severely myopic). He has been diagnosed with the disease for 25 years. He also suffers from HBP and diabetes.

Two weeks  ago I went to an ophthalmologist, prompted by symptoms of wavy/moving,black/white lines (ocular migraine).