Glasses that see through cards are very useful cheating devices for poker players. They have red filters built into them that can be used to read invisible luminous ink marks on the backs of marked cards. These glasses can be worn as normal sunglasses in casinos. They can be used for magic shows and other card tricks. These lenses are perfect for people who do not want to wear contacts but still need to see marked cards clearly.
The lenses are coated in anti-reflective material, which reduces glare while improving contrast. This is particularly important for people with presbyopia, who have trouble seeing at various distances. However, it’s still important to wear these glasses in a comfortable way to prevent eye strain. If you’re wearing progressive lenses for the first time, be aware that it takes some time to adjust to them. You’ll have to train yourself to see through the correct part of the lens to perform each task. Otherwise, you might feel off balance or get headaches.
The website of the company offers a variety of convenient ways to choose a frame. Most retailers offer virtual try-on features or personalized styling assistants that can help you find the perfect frames. You can also use a test chart online to determine the level you need of magnification. Some sites even allow you to submit your prescription and provide a receipt that can be submitted for reimbursement as an out-of-network provider.