覗き眼鏡
1
peep show;device with lens mounted on a stand or in a box to view enlarged pictures
See also:
覗き機関 (のぞきからくり)
2
water glass;hydroscope;box, etc. with glass bottom for viewing underwater
See also:
箱眼鏡 (はこめがね)
Other forms
覗眼鏡 【のぞきめがね】 (irregular okurigana usage) · のぞき眼鏡 【のぞきめがね】