Abstract: An adjustable eyeglass retainer headpiece (10) has a circumferential slit (20) in a cap (12) thereof spaced a substantial distance above a lower edge (16a ) of the cap but below an attachment area (22) of a proximal end portion(30) of an eyeglass retainer member (14). The retainer member (14) extends from the attachment area through the slit to an interior surface (24) of the cap and from there to a distal end portion (32) which extends below the lower edge of the cap for passing about a nose bridge (52) of eyeglasses (50). A lower-edge margin (26) of the cap extending between the lower edge and the slit is substantially unattached to the retainer member so that it can be folded upwardly to adjust the size of the cap.