Ophthalmic Instrument Socks
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Description: A monochrome line drawing on a black background depicts an ophthalmic instrument. The central piece features lenses and adjustment knobs. Textual elements include numerical scales like '20 60' and '20 20' on circular dials, and numbers such as '40', '500', '11000', '218', '98', '20', and '010'. The style is a detailed mechanical sketch.
