The ornamental design for a breathshield for a slit lamp microscope, as shown and described.
FIG. 1 is a front perspective view of a breath shield in a first configuration which is a mirror image of the rear perspective view of the breath shield;
FIG. 2 is a front perspective view of the breath shield shown in a second configuration;
FIG. 3 is a plan view of the breath shield;
FIG. 4 is a bottom view of the breath shield;
FIG. 5 is a right side elevation view of the breath shield which is a mirror image of the left side elevation view of the breath shield;
FIG. 6 is a right side elevation environmental view of the breath shield shown installed on an eye examination instrument in the same configuration as shown in FIG. 1;
FIG. 7 is a right side elevation environmental view of the breath shield shown installed on a slit lamp microscope eye examination instrument in the same configuration as shown in FIG. 2;
FIG. 8 is a front elevation view of the breath shield shown in the first configuration, the front elevation being a mirror image of the rear elevation view; and,
FIG. 9 is a front elevation view of the breath shield shown in the first configuration, the front elevation being a mirror image of the rear elevation view.
The broken lines shown in FIGS. 6 and 7 depict environmental subject matter that form no part of the claimed design.