fashion glasses; non-prescription glasses; fake glasses
Glasses worn purely for style, with plain or no lenses. Often called 'fake glasses' or 'lensless glasses' in English.
She wears fashion glasses to give an intellectual impression.
These fashion glasses have no lenses.
眼鏡 is the general term for glasses, usually prescription. 伊達眼鏡 specifically refers to non-prescription glasses worn for fashion.
サングラス are sunglasses, primarily for sun protection. 伊達眼鏡 are clear or lensless glasses worn as an accessory.
Standard kanji spelling.
Common variant with メガネ in katakana.
伊達 (date) refers to stylishness or dandyism, from the Date clan of Sendai known for flamboyant fashion. Combined with 眼鏡 (megane, glasses), it literally means 'stylish glasses'.