Our popular Dome Magnifiers are unique light gathering solid optical grade acrylic circular lens magnifiers that is uniquely shaped in a half circle. This provides a distortion-free pre focused 3x – 4x magnifying power, depending on model chosen. (see magnification model specs below next to order now buttons) The unique design allows a dome magnifier to glide effortlessly across a smooth reading surface and makes reading small print a pleasure and reduces eyestrain; because they are pre-focused you simply place the magnifier directly on the item to be viewed. Their inherent circular clear bright field design allows ambient light to be drawn in from all sides & naturally brightens your magnification surface, making the dome magnifier the perfect optical tool for enhanced reading of magazines, newspapers, maps, marine and aviation charts, contracts, architecture plans and other reading material. They are an ideal low vision aid for the visually impaired, and is an effective and often recommended reading aid for the visually challenged, those with macular degeneration, and myopia. Both our 3.5 and 4.5 inch Dome are wide enough to magnify the entire column of most newspapers into one field of view. These are the ideal reading magnifier for anyone that loves to read and needs that extra help visually.