Internal Reading Lensmeter with Magnified Data Display is available with built-in digital printer. National Industrial Company supplies Internal Reading Lensmeter with Magnified Data Display. National Industrial Company offers different types of auto chart projector refract meter, auto ref/keratometer, automated perimeter, binocular loupes, diamond knives, green laser, handles, hand held slit lamp, head lights, indirect ophthalmoscopes, lenses etc. Internal Reading Lensmeter with Magnified Data Display comes under the model number- L-4500, has data record sound option.