optically
adv. manner C1 Advanced US //ˈɑptɪkɫi// UK //ˈɒptɪkli// op·ti·cal·ly
adv. in a way that relates to how light works or how things look. You use this when talking about how light travels or how a lens changes an image.
adv. in a manner relating to the properties of light or the science of vision. Often describes the behavior of light as it interacts with materials or the performance of optical instruments.
The new glasses are optically perfect.
The scientist studied how the material reacts optically when exposed to different wavelengths of light.
While the lens is optically superior, its physical weight makes it impractical for handheld photography in low-light conditions.
From optical + -ly.