Full-frame and half-frame reading glasses
Even though that there are many different types of reading glasses, the first most important choice is whether you want a full frame or a half-frame one. Full- frame reading glasses looks like regular eyeglasses, with a frame that goes all the way around the lens, and the lenses sit directly in front of your eyes. These reading glasses are good when you have spent a long time concentrating on material close-up. When you look up from reading, objects in the distance appear blurry.

Half-frame reading glasses are flat on the top of the frame, and are designed to sit down on your nose so that you look down through the lens when reading. When you look up through these glasses, you can look through air over these lenses, not through a lens so objects in the distance are not blurry. You can see our selection of full-frame and half-frame reading glasses by going to our online store ozglasses.com.

Rimless reading glasses are more practical because it is easier to look over the top of the frame when switching from close-up to distance viewing. The edge of these lens obstructs your vision much less than an full eyeglass frame does.

Folding reading glasses
Folding reading glasses are especially designed to take up less space in your pocket or purse. There are a wide various designs of folding reading glasses. Some have been called pen readers or tube readers that fold into a little tube, and you can drop it in your pocket. The tube of these glasses helps to protect the reading glasses from getting crushed. A lot of online retailers provide much information where you can go to there to see the full collection of folding reading glasses.

Bifocal reading glasses
Bifocal reading glasses is a special glasses that it has clear lenses at the top, and reading lenses at the bottom. With bifocals, you can look straight through the top portion of the lens, and still get reading magnification when you look down.

The role of glasses is different; the election will not be the same as children wear glasses.

•If you use them to rectify your eyesight, then you need proper glasses prescription;
•While those used to protect eyes require high quality prescription glasses.
•As to those used as decoration, they should be of the latest fashion glasses,

Different genders have different demands for glasses.
•Women like the beautiful things and will select good-looking glasses;
•Gentlemen pay attention to glasses quality;
•Children’s main point is to correct eyesight, the prescription glasses quality is important.

Progressive glasses and bifocal eyeglasses are the best choices for the senior citizens.

And different careers require different glasses. For example,
•A welder needs to wear a welding goggle.
•Pilots are required to wear pilot goggles.
In this way the security in their work can be guaranteed.

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Here are some examples of how your prescription might look:
Example 1:

Example 2:

Example 3:
R: -3.75 / -1.25 x 178
L: -3.75 / -1.50 x 180

First, let’s translate the abbreviations.

O.D. = right eye. In example 1, the top row contains measurements for the right eye.
O.S. = left eye. In example 2, the bottom row contains measurements for the left eye.
SPH = SPHERE power, or the main correction power which corrects refractive error.
CYL = CYLINDER power corrects astigmatism refractive error.
AXIS = shows where an astigmatism is located along the eye’s horizontal axis.
ADD = the amount added to the sphere (SPH) value for those requiring reading glasses, bifocal or progressive lenses.
PRISM = indicates the image’s displacement value through the lens for those with unusual conditions like a squint or lazy eye.

Some other abbreviations you might see:

D.S. or DS = diopters sphere which indicates that you have only a sphere value and no cylinder value; therefore you need no correction for astigmatism.
D.V. = distance vision
N.V. = near vision, sometimes written as N.V.O.
O.U. = both eyes
X = axis
P.D. = pupillary distance

Further information

SPH / SPHERE
All prescriptions have this measurement and this indicates the strength of your prescription in increments of 0.25. It is measured in diopters for either nearsightedness (myopia) or farsightedness (hyperopia). The number is sometimes written without the decimal point. For instance, 150 is 1.50.

Often the + or – sign is written above the number, so please check and select these signs carefully. You might also find an infinity (∞) symbol, Pl or PL in the sphere column. When ordering your glasses please select the ‘infinity’ or ‘plano’ option in the drop-down menu. In the prescription example 3, -3.75 is the sphere value for each eye.

CYL / CYLINDER

If you have an astigmatism, your prescription will have a number in this column. The number should be between +/-4 and in 0.25 increments. It’s common for the cylinder value to be the same for both eyes.

For any cylinder value provided, there will always be a value for axis.
There’s a huge difference between a positive (+) and negative (-) cylinder, so pay close attention when ordering, and select the correct sign.

In prescription example 2, the person has a -0.25 cylinder value for both distance and near vision. Sometimes the optometrist will leave out the decimal point, and you might find the negative symbol written above the number and not before it.

If you find a ‘DS’ or ‘SPH’ in the CYL column, this means that you have no astigmatism and hence no cylinder value, only a sphere power in your prescription. In this case, select the ‘CYL none’ option in the drop-down menu.

In example 3, the person has a -1.25 cylindrical value in the right eye and a -1.50 cylindrical value in the left.

AXIS

If you have astigmatism, the axis value indicates where your astigmatism is located along your eye’s horizontal axis. Not all prescriptions have axis and cylinder values; however if you have astigmatism you should have both of these values on your prescription. The axis number will be between 1-180 degrees, and it should always be a whole number – there should be no decimal point.
In example 3, the person has an axis value of 178 in the right eye, and 180 in the left eye.

ADD / NEAR ADDITION

This value can be written anywhere on the prescription. It indicates the amount to be added to the SPH value for reading, intermediate glasses or computer work. If you can only find one ADD value, this means that your ADD is the same for both eyes. If you find two figures, then you have a different ADD value for each eye.

If your prescription has a completely separate column for ADD, this means that this measurement is for the lower or reading section of your bifocal lenses.

PRISM and BASE

The prism and base sections are usually left empty, as they are not commonly seen on most prescriptions. Prism is used to treat people with a muscular imbalance or other conditions like a squint or lazy eye. While the prism value refers to the displacement of the image through the lens, the base value refers to the direction of this displacement.

Please enter your prism and base information into the ‘Any extra information’ box when ordering online.

BALANCE

If there is little or no vision in one eye, the optician might write ‘balance’ on your prescription to ensure that your lenses are a similar weight and thickness for cosmetic reasons.

If you have this written on your prescription, please enter this information in the ‘Any extra information’ box.

Extra tips

• For distance correction, most of the time the value under sphere is negative.
• For reading-only correction, most of the time the value under sphere is positive.
• Please ensure that you get the + or – symbol correct. This will make a huge difference to the accuracy of your lenses.
• If some of the boxes on your prescription are blank (e.g. no CYL or AXIS or ADD values), leave those boxes blank when ordering.
• If you have a value under “Near Vision” (N.V., N.V.O.) then enter the power in the BOTTOM half of the form and leave the ADD power blank or (“0.00″).
• For bifocal and progressive lenses, please check with your optometrist whether the Addition (ADD) value is for bifocals or progressives.
• Sometimes optometrists will leave out the decimal point on the Sphere, Cylinder and Addition values. For example, -25 is understood as -0.25, and +175 is +1.75.
• If you see a PAL note written on the prescription, then this simply indicates that your prescription is for PROGRESSIVE lenses.
• Please be advised that we process a minimum of +1.00 and maximum of +3.00 for ADD powers.

If there is anything else on the prescription that you are confused about, please call or e-mail our Customer Service and we’ll be happy to assist you.

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The first step in getting glasses is to choose whether you will go to a doctor’s office or to your local eyeglasses store. Choosing a doctor’s office to get the eye exam and the glasses frames can be choosese at an online glasses store.

The most familiar of all prescription eye glasses tests is known as the refraction test which is the famous eyesight chart viewed from about twenty feet away. In the eye glasses store or a doctor examiner’s office, the chart will most likely be viewed from a machine that looks like part of the missile firing station on board a Star Wars spaceship. The patient looks at the eyesight chart through this machine, called a phoroptor and the very familiar words, “Is this better, or this one better” can be heard over and over again as the examiner moves through a number of lenses for the best clarity. There will be a test for glaucoma, which is generated by a puff of air directed at the eye to test pressure against the eye wall. The examiner will watch the movement of the eye to understand how strong the muscles are around the eye that gives it movement. These optical tests are routine and will probably be given no matter where one goes to have an eye examination, but perhaps some doctors may add more tests for a comprehensive analysis of the ocular system. The person getting the prescription glasses exam will need to decide just how extensive the testing ought to be and that decision may clearly decide to which kind of examiner he will go and the good news is that one can take the prescription and go elsewhere for frames and lenses.

A person makes the best decisions when he or she has all the information. The best advice would be to read up as much as possible on the type of vision problem you have and explore all the options. Perhaps contacts are a better solution than prescription glasses, especially if you are in certain sports or work activities where glasses would be a detriment.

After you have got your prescription, the options that people have when ordering their eyeglasses frames and lenses are searching online. For the person looking just to save money, there are countless discount prescription glasses vendors offering two pairs of glasses for fewer than one hundred dollars, that is too expersive, so why not buying online? Also very easy and get a pair cheap glasses very quickly, usually with 7 days.

Pupil from the smaller, more difficult to select glass frame, especially wide or rectangular face, it is very difficult to select eyeglasss frames. The best selection of glasses is transparent bridge.

Eyeglasses is not only an eye protection, but also a decoration. Glasses in people’s lives will play an important role.

The type of glasses lenses: anti-reflective lenses, color lenses, polarized lenses, progressive lenses, and coloring lenses.