Does not work.

I tried all the suggestions from the individuals below who said it works. I did it so many times and kept getting around 57mm. I figured great, a consistent number it must be right. Then i had my optometrist measure it and it came back at 66mm. Way off. Dont waste your money. And for the people who accepted the value because it gave you a consistent number, dont be foolish. Measure it manually, its not hard.

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