Binoculars have three main parts: the objective lens, prisms and the ocular lens. Binocular lenses are thicker in the middle and taper out to a thinner edge, which bends light toward the middle. These ...

A microscope objective lens produces a real, magnified image of an object placed within the field of view. Before it is observed the image is then magnified again by the ocular lens, also known as the ...

Celebrating 75 years of intraocular lens advancements that have improved care for millions of cataract patients. On November 29, 1949, Sir Harold Ridley performed a surgical procedure to replace a ...

—There is no perfect intraocular lens, but matching a patient with the lens that best meets their needs can help reduce postoperative dissatisfaction. Reviewed by Sarju Patel, MD, MPH, MSc, Director ...

Figure 1 (a) Structure of the mesoscopic objective, (b) Aberration distribution of the mesoscopic objective, (c) Wide-field imaging system built with the mesoscopic objective, (d) Laser point-scanning ...