The term MONOCLE is a type of eyewear consisting of a single LENS that is held in place by a frame. The crossword solutions for this term are EYEPIECE (8 letters), EYEGLASS (8 letters), and LENS (4 letters). An EYEPIECE is the part of an optical instrument that is placed near the eye and contains the lenses through which the user views the object. Eyeglasses are frames with lenses that are worn to correct vision or protect the eyes from sunlight. A LENS is a curved piece of transparent material, such as glass or plastic, that is used to refract light and form an image.