The ruler is made of good material, making it durable for storage and use over many years. I found it easy to use, even without assistance from another person. I personally bought it to measure the pupillary distance of my 7-year-old daughter, and it was very simple. I also find it convenient that it offers two measurement options: the total distance between pupils and individual measurements from the center of the nose to each pupil, in case the face is not 100 symmetrical. If everyone at home wears corrective glasses, this is a must-have tool.
Rating:
[5 of 5 Stars!]