An open riser is a stair design characterized by the absence of vertical riser boards between the horizontal treads, creating a series of gaps that allow for a floating appearance. This architectural feature is primarily used to enhance the sense of openness and airiness within a space by facilitating the flow of natural and artificial light through the staircase. Typically found in modern and minimalist interior designs, open risers transform a functional vertical circulation element into a sculptural focal point that visually expands smaller rooms and preserves sightlines across open-plan layouts. To maintain structural integrity and comply with safety building codes, these stairs often utilize thicker treads and specialized support systems like mono or double stringers.