Have you ever bought prescription eyeglasses?
How many prescription eyeglasses can you buy inexpensively in your country?
In addition, you're able to buy eyeglasses without a prescription as most Japanese eyeglasses stores give an eye test there.
JINS sells many kinds of reasonable eyeglasses.
It is a good souvenir, isn't it?
I bought this for 5400 yen including tax. I'm satisfied with the high quality lenses.
This one is designed in Tokyo, and made in China.
JINS has many stores all over Japan.
English information is available but is not about the stores in Japan.