Within each content area, there are one or more tutorials. Each tutorial consists of lessons. Each lesson should be a page detailing the concept being taught, along with sample code. Lesson and page ...

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The all-new LensChek™ Pro Digital Lensometer® with PD + UV, part of the VisionChek™ Digital Exam Suite, combines technology with simplicity at the core of your exam. The new, compact, modern design ...

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 ...

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...