DR-3.75 Large easy to manipulate Rectangular Dome Magnifier has 2 flat sides for easy handling and more focused viewing area. This unique design takes advantage of naturally illuminating design of a bright field magnifier with the optical superiority of a thick aspheric lens, the plano base is raised .5mm to avert surface scratching. DR-3.75 is a 3.75" Inch large size 3.75x Rectangular Dome Magnifier and is the ideal easy to use reading stand magnifier. Its rectangular shape makes it easier to hold and guide along a reading path. This Dome Magnifier provides a magnifying area that is large enough to magnify a full column in a newspaper and specific hard to read areas on documents, technical plans, marine charts, architectural plans, and geological maps.