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Diopter Glass
Checkout Ebay Auctions For The Cheapest Prices
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 Bulldog Smoke Lens Bifocal Safety Glasses Diopter + 1.5  US $4.25
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 (Set of 3) Safety Glasses Clear lens diopter 2.5,bifocal US $12.90
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 Bulldog Safety Glasses dark lens diopter 2.0,bifocal US $3.99
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 (Set of 3) Safety Glasses dark lens diopter 1.5,bifocal US $12.90
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 Bulldog Safety Glasses Clear lens diopter 2.0,bifocal US $3.99
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 Welding helmet magnifier, 2x4, 2.50 diopter, glass US $5.95
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 (Set of 3) Safety Glasses Clear lens diopter 1.5,bifocal US $12.90
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 Bulldog Smoke 2.0 Lens Bifocal Safety Glasses Diopter 2.0 US $4.25
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 Safety Glasses Bi Focal 3.0 Diopter, Cat Eye Style US $7.99
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 Welding helmet magnifier, 2x4, 2.0 diopter, glass US $5.95
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 Bulldog Smoke 2.50 Lens Bifocal Safety Glasses Diopter 2.5 US $4.25
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 Safety Glasses Bi Focal 2.5 Diopter, Cat Eye Style US $7.99
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 Welding helmet magnifier, 2x4, 2.25 diopter, glass US $5.95
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 Bulldog Clear Lens Bifocal Safety Glasses Diopter +1.0 US $4.00
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +1.25 Diopter Sale Price: $12.49  |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132mm Overall Width |
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +1.00 Diopter Sale Price: $14.99 |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132mm Overall Width |
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +1.50 Diopter Sale Price: $12.49 |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132mm Overall Width |
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +2.00 Diopter Sale Price: $12.49 |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132mm Overall Width |
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +3.00 Diopter Sale Price: $14.00 |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132 Overall Width |
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3M BX Dual Reader Safety Glasses, 2.5x top and bottom diopters Sale Price: $12.25 |
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Ideal for workers that require reading glasses, but need eye protection as well. Dual magnifiers on the top and bottom of the lens make it easier when you have to look up and down at your work. Polycarbonate lens provides 99.9% UV protection. Compliance: ANSI Z87.1-2003 |
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Small Clear Clip-on Flip-up Magnifying Reading Glasses +1.75 Diopter Sale Price: $12.95 |
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Our clip-on flip-up magnifying readers are made to fit most safety glasses. Magnifying readers are great if you do occasional close-up work. Their main use is with periodic close-up examination, reading, and writing. Easy attachment and removal, superior protection and durability, and customized prescriptions mean convenience, easy pocket storage, and safe, healthy eyes. Lens size - 58mm x 35mm x 132mm Overall Width |
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3M BX Dual Reader Safety Glasses, 2.0X top and bottom diopters Sale Price: $12.25 |
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Ideal for workers that require reading glasses, but need eye protection as well. Dual magnifiers on the top and bottom of the lens make it easier when you have to look up and down at your work. Polycarbonate lens provides 99.9% UV protection. Compliance: ANSI Z87.1-2003 |
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Aven 26505-LED Mighty Mag Led Magnifying Lamp with 80 High Powered LED Lights, 2.25x Magnification, 5 Diopter, 32" Spring Balanced Arm List Price: $250.00 Sale Price: $99.95 |
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The Aven 26505-LED Mighty Vue magnifying lamp with 80 high-powered LED lights (40 on each side) has a large (7.5 x 6.2 inches [H x W]), clear, 5-diopter glass lens with 2.25X magnification, and a 32-inch, adjustable arm with a mounting clamp. This magnifier enhances the size and resolution of an object or image, and is commonly used for a variety of applications, such as jewelry making, watch making, needlework, artwork, electronic inspection, fly tying, book reading, print inspection, and stamp collecting. This lighted magnifier features 80 high-powered LED lights (40 on each side) which provide 20,000 hours of high-powered (1,000 lux) illumination to reduce eyestrain, and to control brightness. A clear, 5-diopter glass lens with 2.25x magnification provides distortion-free viewing. The round, monocular lens is surrounded by a lightweight, plastic, protective perimeter. The magnifier has a raised switch on the top of the light to activate lighting. Concealed springs and tension adjustment knobs allow the adjustable arm to securely set in many positions. It comes with a table attachment clamp for mounting. The magnifier weighs 10 lb., and works with a 115V power source. Lightweight plastic housing protects the light. It has a one-year limited warranty against manufacturing defects. A dioptric number and a magnification number are not the same thing. Diopter strength represents a specific magnification power (X). For example, a 5-diopter provides 2.5X magnification (at a distance of 8”). Diopter (D) is a technical term for the measurement of the light curvature and thickness of a lens. A dioptric number and a magnification number are not the same thing. Diopter strength represents a specific magnification power (X). For example, a 5-diopter provides 2.5X magnification (at a distance of 8”). The higher the diopter, the more magnification a lens can provide. As magnification increases, distance to the object (focal length), and field of view (diameter, or narrowness of view) decrease. Magnifiers and prescription eyeglasses have a diopter value, such as 1.5 or 2. The dioptric strength of an accessory lens, such as prescription eyeglasses or an eye loupe, must be added to the dioptric strength of the magnifier to calculate total magnification. Magnifiers are devices used to enlarge the visual appearance of an object or image. Magnifiers come in a variety of styles such as hand-held, headband, standing, clip-on, eye loupe, and those that hang in a necklace form, or fit in a trouser pocket. Magnifiers are commonly made of plastic or glass. They can have one or more lenses with varying magnification abilities, and can have a binocular configuration with a single lens, or two separate lenses. They are sometimes used with LED or fluorescent light sources to help control viewing capabilities. Magnifier ability is often expressed as magnification at a specific length. For example, 1.75X at 14” means that when a magnifier is held at 14” from a viewer’s eyes, the object will be magnified 1.75 times (X) its actual size. As magnification increases, viewing areas and focal length decrease. Magnifiers sometimes have a diopter number, expressed as + or - D, which is a measurement of strength (or power) of the lens. Some magnifiers are marked with a dioptric number on the lens. A high diopter number has a higher magnification than a low diopter number. Aspheric magnifiers, unlike spheric magnifiers, produce a sharp image to the edge of the lens for less distortion. Magnifiers are widely used in jewelry inspection and fabrication, watch-making, needlework, artwork, fly-tying, electrical inspection, reading, print inspection, and stamp-collecting. Aven manufactures optical inspection tools, precision tools, and bench accessories for industrial, scientific, and research applications. The company was founded in 1983 and is headquartered in Ann Arbor, MI. What’s in the Box? LED Mighty Vue magnifying lamp; 26505-LED Instruction manual |
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3M BX Dual Reader Safety Glasses, 1.5x top and bottom diopters Sale Price: $12.25 |
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Ideal for workers that require reading glasses, but need eye protection as well. Dual magnifiers on the top and bottom of the lens make it easier when you have to look up and down at your work. Polycarbonate lens provides 99.9% UV protection. Compliance: ANSI Z87.1-2003 |
Here are some more information for Diopter Glass:
The HoodLoupe 2.0 started out a nice device for your digital camera that solved two problems at once:
- It fit over the viewer and stops glare cold--great for outdoor shots where you can barely see the image because of bright sunlight.
- It added an element of stability to holding your camera. No longer were you holding the camera at arms length with two wobbly arms. You were holding it with two arms and your eye socket. Three points of contact are better than two, no matter how much anti-shake your camera has. It was a decent solution for those units without SLR style viewfinders.
Now there is HoodLoupe 3.0 and it's a vast improvement. First, it's larger, able to cover a 3" square LCD screen (with an optional 4" square extender). It's also made with a superior German glass, so that objects appear much clearer, more vivid. It's completely rubber coated, apparently to minimize danger of scratching camera equipment. About the only change that's curious is the removal of the safety- conscious Velcro fastener for the case's belt clip. (I would have preferred a belt loop anyway, since clips tend to detach.) Accessories include the HoodEYE 3.0, which blots out ambient light on sunny days. It works as well as the similarly shaped HoodEYE Digital SLR Eyecup. I found the eyecup slips easily over my Canon Rebel Xsi's eyepiece mounting rails but doesn't slip off (unlike other aftermarket eyecups). The Cinema Strap attaches to the HoodLoupe and allows you to secure it to your live-view-enabled SLR via adjustable rubber straps. Note that this does demand an extra minute of setup time. Many will find it more useful with tripod shots rather than action photos that have to be snapped on the fly.
For those with digital SLRs and legacy-style viewfinders, feel free to continue using the viewfinder for focussing and framing. It may be adequate if equipped with an eyecup. But remember this: it's still better looking at your results through the rear LCD screen than through a tiny viewfinder. And for doing that outside, you'll need a tool like the HoodLoupe™ Professional. It even has a diopter knob to adjust to your vision, like a binocular eyepiece.
This gadget comes with a handy carrying case. Its only problem is the belt clip. Even with my thin belt, the clip closure just doesn't work optimally. A belt loop would have been a better design choice.
Peter Bates
pbates@batescommunications.net
batescommunications.net
stylus.batescommunications.net
How to read your glasses prescription?
How to read your glasses prescription?
With the growing popularity of prescription glasses, the demand for trendy, beneficial and cheap online glasses is on an upward slope. But it all starts here: how to read your prescription?
The prescriptions use a standard format and a set of abbreviations, so that they can be interpreted internationally. An eyeglass prescription will look like this:
OD: -2.50 – 0.50 x 180
OS: + 1.00 DS
ADD: + 1.75 OU
Latin Letters:
The letters OD stand for "oculus dexter" and refer to the right eye, OS stand for "oculus sinister" and indicate the left eye and OU stand for "oculi uterque" and refer to both eyes.
Understanding Numbers:
A correct choice of prescription glasses is the result of correct understanding of the numbers in the prescriptions. As it is, prescriptions do have a lot of numbers.
The first number in our example is – 2.50. This is the “sphere” part of the prescription dealing with the “nearsightedness” (or myopia, an eye problem that causes distant objects look blurry) or “farsightedness” (also called hyperopia, which causes difficulty to clearly see the objects which are near). A minus sign (-) indicates negative powered lens to cure nearsightedness and a plus sign (+) indicates positive powered lens to correct farsightedness.
The next number is -0.50. This number represents the "cylinder" part of the prescription, also called astigmatism referring to the difference in curvature and power between two points on the eye, separated by 90 degrees. The minus sign denotes the presence of astigmatism.
The next number is x180, which is read as “axis 180”. It indicates the angle in degrees, ranging from 0 to 180 denoting the position of the most positive meridian in an eye that has astigmatism.
For left eye, the number is +1.00 followed by DS (diopters sphere) which means that the left eye is without astigmatism and the left cornea’s shape is close to perfectly round compared to the right eye cornea’s slightly oblong shape.
Lastly, the ADD number +1.75 means the power that needs to be added to distance prescription so that a person has clear visibility at a close range.
Calculations:
To find out the total power needed, a small addition needs to be done. In the example above, for right eye, the prescription will be (-2.50 + 1.75) – 0.50 x 180 or -0.75 – 0.50 x 180 and for the right eye, +1.75 +1.00 = 2.75 DS.
Though it may look confusing at first, with practice and patience, a proper understanding of the prescription can be gained, which can prove really beneficial while looking for glasses online.
About the Author
The author Radhika is one of the lab experts at EyeExperts, an online spectacles company that provides prescription glasses, designer frames and sunglasses. The author is an experienced optometrist and has vast experience in the eye wear industry.
Are my eyes going to deteriorate any more?
2003-2006: -4.00 and -4.50 diopters
2007-2008: -5.00 diopters
I am now 20 years old and my next optician's test is in 2009. My optician said there had been no huge change in my glasses prescription when I went last year, but it must have changed by -0.50 diopter
Is it going to get any worse than this or will my eyes stabalise? Thanks
Usually eyes tend to stabilize around 18-21. For men, around the 21 mark. But, some people's eyes never stabilize due to genes or other health issues. Nobody can tell you for sure if your eyes will stabilize but if they have been only changing a bit, they shouldn't change much more that......you shouldn't suddenly got to a -9 in a year or something like that.
Magnifying Lamp is protected against static, ESD events.
With 6,500 K light spectrum, 7 in. wide glass magnifying lens, and 1.5 in. diopter swing arm lens, ESD Ultra Slim Magnifying Lamp Model U22091 suits use in Electrostatic Protected Areas. System provides light equivalent to 150 W but uses 28 W of power, and Quick Lens Swap System(TM) enables users to change magnification quickly. Entire lamp - head, lens, joint, and arm - is fully grounded and ...
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