Relating to the refraction of light through lenses or the optical properties of lenses and optical systems.
From Greek 'diopter' plus the adjective-forming suffix '-ic,' creating the standard adjective form used in optical and scientific contexts.
When physicists talk about 'dioptric systems' or 'dioptric telescopes,' they're specifically referring to instruments that bend light through lenses (as opposed to 'catoptric' which uses mirrors)—it's the fundamental classification of how telescopes work.
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