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What do magnifying lenses, your eye, and binoculars have in common? They all use convex lenses. And have any of you wondered why people look so weird when seeing them through a peephole? That’s because the glass used there isn’t a normal one. It is a concave lens. Convex lenses are used to correct farsighted vision problems.

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As for their Shipping Information, the details are not explicitly mentioned in the search results. However, they do mention that they answer common shipping questions in their FAQs. It's suggested to check their website for detailed information.

Similarly, concave lenses are used to correct nearsightedness. Compound microscopes and telescopes use both convex and concave lenses. Using combinations of convex lenses may create blurry images. A concave eyepiece is used to correct this problem. Even in cameras, at times, a combination of concave and convex lenses is used. The use of concave lenses is essential in lasers. The actual light ray is particular, which may damage equipment where it is used (like CDs and scanners). The diverging lens rectifies this issue. Concave lenses also apply in flashlights where the light beam diverges for broader coverage.

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Simple lens and compound lens are the two classifications of lenses. Simple lenses are different from compound lenses based on their surface of curvature. Following are the different types of simple lenses.

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The most apparent distinction between mirrors and lenses is: that mirrors reflect light rays (light bounces back) while light rays are refracted (pass-through) through a lens. A mirror will have only one focal point, which is in front of the mirror. A lens has two focal points, each on either side. In the table below, let us look at more differences between mirror and lens.

The lens classification depends on how the light rays bend when they pass through the lens. The two main types of lenses are:

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My first set of lenses didn't suit me so I returned them, no questions asked. The refund process was a breeze and their customer support walked me through every step. I got a new pair with no hassle at all.

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A lens is a transmissive optical device that focuses or disperses light beams using refraction. A simple lens consists of a single piece of transparent material, while compound lenses consist of several simple lenses arranged along with a common axis. A lens can focus light to form an image, unlike a prism, which refracts light without focusing.

JustLenses.com accepts the following payment types: Visa, Master Card, American Express, and Discover Card. Your credit card is charged when your order is shipped. All prices are displayed in US Dollars and your order total will be billed in US Dollars when it is shipped. If you are using a credit card that is not based on US Dollars, your order amount will be converted to the native currency of your credit card before it appears on your statement. Please be aware that your credit card company may charge an additional fee or fees for this type of transaction.

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JustLenses.com is an online platform that offers a wide selection of contact lenses. They provide the exact contact lenses prescribed by your eye doctor, in factory sealed packaging, at savings of up to 70% off what you would pay at the retail level. They offer a variety of brands from Acuvue to FreshLook Contacts. They also provide the convenience of delivering your discount contact lenses right to your home or office. Their service is designed to be both convenient and affordable, aiming to provide the most healthy, affordable, and convenient service available anywhere. They also offer a hassle-free ordering and money back guarantee. Their website also provides a comparison of their prices with other providers for transparency. For example, Acuvue Oasys 24PK is priced at $142.99 on their site, compared to $169.98 at 1-800 Contacts and $180.00 at an eye doctor's office. They also have a high store rating of 9.5 / 10 based on 226 reviews.

Like seriously smooth sailin' from adding my lenses to the cart through payment and order confirmation. No hassles or waiting on hold to talk to anyone. Makes reordering a breeze.

Taking care of my eyes is important so I appreciate a company that provides high quality products without the inflated price tag. Affordable contacts that still meet my vision needs- now that's real Eyecare!

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JustLenses.com is an online platform where you can order discount contact lenses. They provide the exact contact lenses prescribed by your eye doctor, in factory sealed packaging, at savings of up to 70% off what you would pay at the retail level. They offer the convenience of delivering your discount contact lenses right to your home or office. Here are some examples of their prices:

The shipping time for orders from JustLenses.com varies depending on the destination and the shipping method chosen. For the United States, Standard Shipping takes 5-7 Business Days, FedEx 2 Day takes 2 Business Days, and FedEx Next Day takes 1 Business Day. For Canada, Canada Standard takes 4-9 Business Days and Canada Express takes 3-5 Business Days. For International orders, Standard Intl. takes 8-12 Business Days and FedEx Intl. Express takes 4-5 Business Days. Please note that these times represent the delivery estimates once the order has left the warehouse and do not include warehouse processing time.

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Convex lenses are thick in the middle and thinner at the edges. A concave lens is flat in the middle and thicker at the edges. A convex lens is also known as the converging lens as the light rays bend inwards and converge at a point which is known as focal length. On the other hand, the concave lens is also known as a diverging lens because it bends the parallel light rays outward and diverges them at the focal point.

These prices are subject to change and it's always best to check the website for the most current prices. They also offer the most popular brands in contact lenses at discounted prices. JustLenses.com has a rating of 4.69 stars from 399 reviews, indicating that most customers are generally satisfied with their purchases.

What if we need to find out the exact position of an image with respect to the lens’ position? Do we need to draw a diagram every time? This video defines the Lens Formula, Magnification and Power for lenses and how simple math can be used to make life easy. It also expands on concepts taught in previous classes and defines the power of a lens.

JustLenses.com has a Hassle-Free Returns policy. They offer a 30-day period, from the date shipped, within which to return any contact lenses you have received. To be eligible for return, all products must be in saleable condition (unmarked boxes and factory sealed). If you want to return a product, you need to call their Customer Service Representative for a Return Merchandise Authorization (RMA) number and a prepaid, trackable return label. Returns will not be accepted without an RMA number. Goods returned without the RMA will incur a 25% restocking fee or if you choose to have the product returned, a charge of $14.99 to pack and ship the non-RMA products back to you. They advise using the return label they provide as it is trackable and ensures you receive credit for your return in the event your package is lost. They also cover the cost of return.

Compound lenses are those constructed out of a combination of different simple lenses. The lens types used to build a compound lens may have different refractive indices and other properties. The placement of lenses are such that they lie on a single axis, and properties like focal length are calculated again for the new compound lens.

Your Order is now complete. If you still have a problem or question, please contact one of their friendly Customer Service Representatives for further assistance.

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JustLenses.com is an online platform that offers a wide range of contact lenses at discounted prices. They provide the exact contact lenses prescribed by your eye doctor, in factory sealed packaging, with savings of up to 70% off retail prices. They offer the convenience of delivering your discount contact lenses right to your home or office. Some of their popular products include Acuvue Oasys 24PK, 1-Day Acuvue Moist 90PK, Acuvue Oasys for Astigmatism, Dailies Total 1, and Biofinity. They also offer a variety of brands and types of contact lenses listed from A to Z. The website has a positive rating from customers, indicating satisfaction with their purchases, free shipping, easy process, and processing fee.