Abstract: A magnifying lens assembly consists of a pair of generally rectangular superposed lens members which are housed in a generally rectangular casing and may be selectively withdrawn therefrom for use. A spring member is housed within the casing at each side of the lens members and consists of an abutment member at the front end thereof which is fixed in the open end of the casing and has a pair of spring leaves extending rearwardly therefrom, one for each lens member. The spring leaves are bowed toward the lens members to resiliently center the same in alignment with the casing and the abutment members define a guideway for the lens members at the open end of the casing.