episcope

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episcope

a skin surface microscope that uses the technology of epiluminescence microscopy (the application of oil to produce translucence of the epidermis on a skin lesion). The episcope is placed gently over the lesion to observe its general appearance, surface, pigment pattern, border, and depigmentation.
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Step 3: Using an opaque projector, project the drawing so that the outside box of the original drawing lines up perfectly with the outside edges of the paper on the wall.
Many students chose photographs that needed to be enlarged Using the opaque projector, they traced these portraits onto 18 x 24" (46 x 61 cm) white paper that was taped to a wall in a darkened room.
Step 2: The photo is then translated into a line drawing using an opaque projector.
Others used an opaque projector to enlarge their flowers, then drew directly on the insulation board in pencil.
At the next class, we used an opaque projector to look at pictures of buildings from all over the world.
The seed of my discontent was planted following the eras of stone tablets and moveable type, when we went from opaque projectors, overhead transparencies, and 35mm slides to that marvel of modernity: PowerPoint, possibly the most misused presentation software of the computer age.
Scarcely a generation has passed since educators have gone from 16-mm projectors, slide projectors, overhead projectors, and opaque projectors to video players, DVD players, computers, and power-point presentations in the classroom.