Lenses Stocks List
Symbol | Grade | Name | % Change | |
---|---|---|---|---|
STAA | D | STAAR Surgical Company | -2.40 | |
JNJ | F | Johnson & Johnson | -1.82 | |
NVS | B | Novartis AG | -0.57 | |
SNAP | B | Snap Inc. | 0.26 | |
PPG | D | PPG Industries, Inc. | 0.31 | |
COO | D | Cooper Companies, Inc. (The) | 0.48 | |
NNBR | D | NN, Inc. | 0.62 | |
LPTH | F | LightPath Technologies, Inc. | 0.78 |
Related Industries: Drug Manufacturers - Major Electronic Components Internet Content & Information Medical Instruments & Supplies Specialty Chemicals Tools & Accessories
Symbol | Grade | Name | Weight | |
---|---|---|---|---|
IHE | D | iShares U.S. Pharmaceutical ETF | 22.5 | |
FLSW | C | Franklin FTSE Switzerland ETF | 12.71 | |
EWL | C | iShares MSCI Switzerland Capped Index Fund | 12.45 | |
PPH | C | Market Vectors Pharmaceutical ETF | 11.57 | |
MEDX | D | Horizon Kinetics Medical ETF | 10.64 |
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- Lenses
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses.
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