Reading your prescription starts by identifying which values belong to which eye. “OD” refers to your right eye and “OS” to ...

THE revised edition of Prof. SouthalPs text-book of geometrical optics, in addition to a number of new problems scattered throughout the book, contains an important new chapter at the end of the ...

VISULENS ® 500 from ZEISS is a straightforward, easy-to-use automated lensmeter designed to speed up the refraction and prescription processes. The instrument helps you to spend more time on patient ...

In machine vision, achieving top-quality colour images is essential, but it’s often complicated. Many colour cameras rely on standard Bayer pattern sensors, which filter light and lose signal ...