Which term refers to a window that allows light in but does not provide clear visibility through it?

The term that refers to a window allowing light in while not providing clear visibility is frosted glass. This type of glass is designed to diffuse light, creating a translucent effect that obscures visibility. Frosted glass is commonly used in settings where privacy is desired, such as in bathrooms or office partitions, allowing natural light to enter while maintaining a barrier against direct sightlines.

This property is beneficial in architectural design as it strikes a balance between illumination and privacy, enhancing the comfort and aesthetic of a space without completely eliminating natural light. In contrast, while patterned glass does provide a unique visual element, its ability to obscure visibility may not be as effective as that of frosted glass.