The intricacy and seeming perfection of the eye ... image by Kepler and Scheiner. The nerves of eye and orbit are enlivened by Sherrington, and the chapter describing retinal function ...

Draw a ray which passes from the object through the centre of the lens. Some ray diagrams may also show a third ray. Only the person using the magnifying glass can see the image. The image cannot ...

The contact lens itself can also “smooth out” some imperfections on the eye surface better than glasses ... (Photo Credit: iStock/Getty Images Plus) Wash your hands with soap and dry them.

A study in mice reveals key interactions between proteins involved in fibroblast growth factor signaling and how they contribute to distinct stages of eye lens development.