From how to French brain or play the guitar to how to unclog a sing or perform CPR, you can learn all kinds of useful skills on YouTube. We at Mental Floss are always eager to learn new things and ...
The Illuminated Phoroptor® features lighted sphere, cylinder power and cylinder axis scales that are easier than ever to see. The Illuminated Phoroptor utilizes cool-running, energy efficient LEDs ...
The XCEL 255's wide-field optics provide excellent clarity and detail. The compact design, combined with conveniently placed controls, make this slit lamp a pleasure to operate. The outstanding ...
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