Same Day Glasses PhiladelphiaIn House Eyeglasses Edging
Our tracer and lens edger has the ability to trace the shape of a frame and then cut a lens to shape. This allows us to provide expedited services, if available in your prescription, such as:
Call (215)372-0147 to see if we have your prescription in stock to make your same day eyeglasses in Philadelphia! |
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What is the thinnest glasses lens?
Polycarbonate Lenses - The standard lens material used in the United States for mild to moderate prescriptions +/- 4.00D. This lens material also goes by the name of Essilor Airwear because it is the most lightweight of materials. Polycarbonate is also what is used for safety glasses because of its impact resistance and durability. When combined with Crizal Rock, you are getting the most scratch resistance, durable, easy-to-clean, and lightweight lens available.
High Index Lenses - The "index of refraction" translates to how well a material bends (aka refracts) light. Have you ever held a stick in water and noticed it looks bent or broken? This is because water has a high index of refraction and bends the light differently compared to the air above. Another way of bend or refracting light is by using a curved lens. All prescription glasses have a curvature on both the front and back surface of the lens in order to create the prescription. In general, the higher the curvature results in a higher prescription. Unfortunately, the higher curvature also results in a thicker and heavier lens. Thicker lenses are not only cosmetically undesirable, but optically make it harder to see through. Lenses with a higher index of refraction means that they are made of a denser plastic that is able to bend light better, which means it requires less curvature to achieve the same prescription. Less curvature means a thinner lens.
Pro Tip: If you want the thinnest lens possible, the frame you select matters! For minus lenses especially, the lenses are thinnest in the middle and get thicker towards the edge. This means that the bigger the lens, the thicker the lens. Typically, rounder lenses are best because it results in a uniform thickness all the way around. If you like the oversized frame look, there are plenty of frames that provide that appearance, but the lens itself remains on the smaller side. If you fall in love with a larger frame, but have a moderate prescription, then we can choose the next level high index lenses. For example, if your prescription is -7.00D and you want a larger frame, we can use 1.74 High Index to achieve a thinner lens as compared to 1.67 High Index. Come in to SeeSharp today to see what we mean in person and help our expert opticians find a custom fit!
High Index Lenses - The "index of refraction" translates to how well a material bends (aka refracts) light. Have you ever held a stick in water and noticed it looks bent or broken? This is because water has a high index of refraction and bends the light differently compared to the air above. Another way of bend or refracting light is by using a curved lens. All prescription glasses have a curvature on both the front and back surface of the lens in order to create the prescription. In general, the higher the curvature results in a higher prescription. Unfortunately, the higher curvature also results in a thicker and heavier lens. Thicker lenses are not only cosmetically undesirable, but optically make it harder to see through. Lenses with a higher index of refraction means that they are made of a denser plastic that is able to bend light better, which means it requires less curvature to achieve the same prescription. Less curvature means a thinner lens.
- 1.67 High Index - The best choice for moderate prescriptions between +/- 4.00D to 8.00D. This is a very common lens material that comes in a wide availability of add-on options like Crizal anti glare and Transitions.
- 1.74 High Index - The thinnest lens material possible. 1.74 High Index is best for prescriptions above +/- 8.00D. These lenses automatically come with Crizal Sapphire anti glare, which is the most transparent treatment on the market. Despite being the thinnest lens out there, any prescription over +/- 8.00D will have some thickness, which is why it is imperative to have Crizal Sapphire to ensure the best optical quality through that extra material.
Pro Tip: If you want the thinnest lens possible, the frame you select matters! For minus lenses especially, the lenses are thinnest in the middle and get thicker towards the edge. This means that the bigger the lens, the thicker the lens. Typically, rounder lenses are best because it results in a uniform thickness all the way around. If you like the oversized frame look, there are plenty of frames that provide that appearance, but the lens itself remains on the smaller side. If you fall in love with a larger frame, but have a moderate prescription, then we can choose the next level high index lenses. For example, if your prescription is -7.00D and you want a larger frame, we can use 1.74 High Index to achieve a thinner lens as compared to 1.67 High Index. Come in to SeeSharp today to see what we mean in person and help our expert opticians find a custom fit!
What are anti glare lenses?
There are two considerations when it comes to glare with glasses: the glare that decreases the quality of your vision and the glare the reflects off of the front of the lenses that people see when they look at you. The basic concept of anti glare lenses is to allow more of the light to pass through the lens rather than reflect off of the lens. There are two main categories of anti glare, which result in huge differences in quality and performance.
- Standard Anti Glare Coatings - These are inexpensive add ons after the lens has been manufactured that are sprayed on. They do provide a more transparent lens and look cosmetically better than an uncoated lens. Unfortunately, they can make the lenses harder to keep clean leaving smudges behind and the more you rub the lenses the more they create a static charge that attracts dust. Also, the degrade easily especially when exposed to heat or alcohol-based cleaners and have a general lifespan of 1-2 years before they start to separate from the lens, which is known as "crazing".
- Premium Anti Glare Treatments - All Crizal products are premium anti glare treatments. We call them treatments because they are manufactured within the layers of the lens itself rather than a coating that is added on retroactively. This results in a lens that does not degrade over time like a standard anti glare coating. Crizal anti glare treatments also come with a 2 year warranty for any scratches, chips, or defects. Although these lenses come with a steeper price tag up front, the quality and performance is unmatched and the warranty guarantees replacement when life happens!
What are Crizal Lenses?
What are progressive lenses?
What are Transitions lenses?
Also known as photochromic lenses, this means that they change color (tint) when exposed to sunlight.
