Bifocal glasses

I bought bifocal glasses. It costed only 10,000 yen in JINS.
I think it will cost more than 30,000 yen at other eyeglass stores, why is it so cheap?
By the way, I choosed the cheapest frame (5,400 yen).
In case of JINS, bifocal glasses is plus 5,400 yen, so it is just 10,800 yen.
The clerk said that there was a bit of a sense of incongruity until you got used to it. In my case it was hard to use 2-3 days, I felt sick and I had returned to normal reading glasses.
But I have got used to it when I notice it, it is very nice feeling.
The clerk taught various kinds of tangle to accustomed to the distance perspective, but in my case I did not feel uncomfortable as soon as I used it naturally without consciousness.
When speaking with the customer, if it is an ordinary reading glasses, the focus will match the document at hand, but the customer’s eyes and facial expressions are out of focus.
In such a case, I took off the glasses and talked everytime, but this was troublesome.
The glasses I bought this time do not contain any degree at all, so I can work comfortably without removing the glasses one by one.
This is useful