Which type of glass is translucent and allows light while obscuring vision?

Patterned glass is designed to allow light to pass through while obscuring the view from the other side. This characteristic makes it ideal for applications where privacy is desired, such as in bathroom windows or office partitions. The surface of patterned glass is manipulated to create designs or textures that scatter light, enabling it to transmit light effectively but preventing clear visibility.

Obscure glass also has similar properties but may not offer the same range of decorative options or textures as patterned glass, which distinguishes the latter as the correct answer in terms of versatility and aesthetic quality. Tempered glass is known for its strength and safety features but does not inherently provide the same light-diffusing properties. Plate glass is typically flat and designed for clarity, which does not lend itself to obscuring vision effectively. Thus, patterned glass stands out as the best choice for this specific characteristic of translucency coupled with light transmission.