the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
undistorted by emotion or personal bias; based on observable phenomena
the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
a transparent optical device used to converge or diverge transmitted light and to form images
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
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
