NxM matrix comprising, arranged directly alongside one another or behind one anther, conveyor devices for a transport container (91, 92, 93, 94) for spectacle lenses, wherein each of the conveyor devices comprises: - a linear conveyor unit (3, 31) for conveying the transport container (91, 92) in a rectilinear direction, - a rotary unit (4, 41, 42) for rotation of the linear conveyor unit (3, 31), - a first housing element for the rotary unit (4, 41, 42), said first housing element having a plane and conjointly rotating with the rotation of the linear conveyor unit (3, 31), wherein the first housing element, conjointly rotating with the rotation of the linear conveyor unit (3, 31), has one or more first openings (17a, 17b) through which the linear conveyor unit (3, 31) passes through the plane, wherein the linear conveyor unit (3, 31) is spaced apart from the plane by one or more gaps with associated gap dimensions, wherein - the gap dimensions of all the gaps are smaller than or equal to 5 mm, wherein - the first housing element has no further openings or a plurality of second openings with associated opening widths, said second openings passing through the plane, wherein the opening widths of all of the second openings are smaller than or equal to 5 mm, wherein - a stationary circular-cylindrical second housing element is present, which encloses the rotary unit (4, 41, 42) and does not conjointly rotate with the rotation of the linear conveyor unit (3, 31), wherein - the plane of the first housing element conjointly rotating with the rotation of the linear conveyor unit (3, 31) is located within the stationary second housing element and is configured to have a shape complementary to the stationary second housing element, wherein - the rotary unit (4, 41, 42) and all of the driven components of the conveyor device are arranged completely within the circular-cylindrical second housing element, and wherein - the circular-cylindrical second housing element is configured as a closed shell surface which has no openings or a plurality of round or angular openings, of which the diameter or clear width or clear length is smaller than or equal to 5 mm. - a linear conveyor unit (3, 31) for conveying the transport container (91, 92) in a rectilinear direction, - a rotary unit (4, 41, 42) for rotation of the linear conveyor unit (3, 31), - a first housing element for the rotary unit (4, 41, 42), said first housing element having a plane and conjointly rotating with the rotation of the linear conveyor unit (3, 31), wherein the first housing element, conjointly rotating with the rotation of the linear conveyor unit (3, 31), has one or more first openings (17a, 17b) through which the linear conveyor unit (3, 31) passes through the plane, wherein the linear conveyor unit (3, 31) is spaced apart from the plane by one or more gaps with associated gap dimensions, wherein - the gap dimensions of all the gaps are smaller than or equal to 5 mm, wherein - the first housing element has no further openings or a plurality of second openings with associated opening widths, said second openings passing through the plane, wherein the opening widths of all of the second openings are smaller than or equal to 5 mm, wherein - a stationary circular-cylindrical second housing element is present, which encloses the rotary unit (4, 41, 42) and does not conjointly rotate with the rotation of the linear conveyor unit (3, 31), wherein - the plane of the first housing element conjointly rotating with the rotation of the linear conveyor unit (3, 31) is located within the stationary second housing element and is configured to have a shape complementary to the stationary second housing element, wherein - the rotary unit (4, 41, 42) and all of the driven components of the conveyor device are arranged completely within the circular-cylindrical second housing element, and wherein - the circular-cylindrical second housing element is configured as a closed shell surface which has no openings or a plurality of round or angular openings, of which the diameter or clear width or clear length is smaller than or equal to 5 mm.