English to Russian Medical Medical (general) очки

Inline frame is the least widely produced of the three types and is easily mistaken for a standard full rim frame; however the way in which the lenses are mounted is very different to that of a full rim frame. In a standard full rim frame the lenses are cut with a beveled edge and this is fitted into the grooved rims of the frame. Inline frames require the lenses to be cut with a groove instead, similar to that used for a semi-rimless frame. An inline frame has very thin metal rims shaped like blades which then slot in the grooves cut into the lenses. It is widely recognized in the optical industry that inline frames should be glazed only with a specific few types of lens material. The exact material used will be influenced by an individual’s prescription strength. Lenses of standard thickness in refractive indices 1.50 or 1.56 are generally considered to be too brittle and may crack or chip easily even with light use.

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