Why are rimless glasses more expensive than other rimmed glasses?

[Elise]

When I was choosing prescription glasses in the store, I found the rimless ones were the most expensive. Why? They use the least material.

[Elisha]

Rimless glasses are more delicate than other rimmed glasses, so they are required to be made of durable material like titanium which is very lightweight and durable. Thus the material of the rimless glasses is more expensive than that of other rimmed glasses. Besides, rimless glasses take the manufacturers more time and care to finish them due to their delicate properties, so they are more expensive than other rimmed glasses.

[Emely]

I don't think that all rimless glasses are expensive than other rimmed glasses. There are rimless eyeglasses that cheaper than some full rimmed eyeglasses frames. The rimless glasses are more expensive than some rimmed eyeglasses because the lenses of rimless glasses must be very sturdy. Since there is no frame to protect the lenses, the materials must strong enough and not break when dig a whole for fix eyeglasses frames.