An optical device with perfect or approximate axial symmetry which transmits and refracts light, concentrating or diverging the beam.
Transparent, biconvex natural lens inside the eye that, along with the cornea, refracts light to be focused on the retina, and whose shape can be modified by muscles to adapt the focal distance.
biconvex transparent body situated behind the iris in the eye; it focuses light waves on the retina
equipment that uses a magnetic or electric field in order to focus a beam of electrons
genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
a transparent optical device used to converge or diverge transmitted light and to form images
electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
(metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen"
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
(metaphor) a channel through which something can be seen or understood
