Retina
transparent
The maple leaf was so thin it was transparent.
The conjunctiva is a thin, clear, mucous membrane that covers the sclera, or white part of the eyeball, and lines the inside of the eyelids. It lubricates and protects the eye.
convex lens
A convex lens.
thin; transparent;
In optics, a thin lens is a lens with a thickness (distance along the optical axis between the two surfaces of the lens) that is negligible compared to the focal length of the lens. Lenses whose thickness is not negligible are sometimes called thick lenses.
The diffrence between thick and thin lens depends on your precription for your eyes.
A thin piece of wood that covers a roof is called a shingle.
its a thin, transparent layer over the cornea
cirrus cloud!
Sheer fabric is a fabric that is made using really thin thread and a low density knit. It appears fairly transparent and it is also very flimsy.