These numbers often change (or disappear) between your glasses prescription and your contact lens prescription, especially with higher powers. Contact lens and eye glasses prescriptions are not interchangeable.
This is the distance from one edge of the contact lens to the other.
How to read contact prescription power. Diameter (usually a number between 13 and 15) If you find the information displayed above on your prescription, you have a contact lens prescription. Eye, power (sphere), bc, dia and brand.
Contact lens manufacturers make lenses in 0.25 d power increments. Some peoples prescriptions will also include a cylinder, axis, add and in some cases, colour. These are the numbers associated with the actual power needed in your lenses.
These are specialized contact lenses that offer a different focusing power depending on whether you’re looking far away or up close. Although many assume a contact lens prescription is the same as an eyeglass prescription, the two are not interchangeable. Regular soft contacts do not correct for your astigmatism, but your eye doctor will typically try to partially correct for it by changing the power of the lens.
How do i read my prescription? The unit of measure for sphere power is a dioptor, or d. Eye, power (sphere), bc, dia and brand.
However, multifocal contact lenses are unfortunately far from perfect. These are the numbers associated with the actual power needed in your lenses. Locate the prescription on the side of the box as seen below:
Generally, it will range from +0.75 to +3.00 d and will be the same power for both eyes. These numbers often change (or disappear) between your glasses prescription and your contact lens prescription, especially with higher powers. When you select your frame, you are taken to a prescription page that asks you to enter all values from your prescription, including your add power (which corrects your reading/near vision).
If you find the information displayed above on your prescription, you have a contact lens prescription. Once you’ve filled out your prescription, you’re taken to another page that asks you to choose whether you want reading, distance, or reading & distance. The right eye is always listed first on the prescription.
If you see a plus sign (+) before the strength, it means that you have hyperopia, or farsightedness, in that eye. These are the numbers associated with the actual power needed in your lenses. And the power will also be different because, while a contact lens sits directly on the surface of the eye, eyeglasses sit about 12mm in front of it.
The greater the sphere power is from zero, the stronger the prescription. Power, pwr, sphere or sph: In order to get a contact lens prescription, you have to visit an optometrist and complete an eye examination.
Base curve, diameter, power (or sphere), and then additional figures for cylinder and axis if you have an astigmatism, and addition and dominant figures for presbyopia correction. Power (also referred to as sphere or sph) bc: This is just a sample prescription.
The prescription should unfold in the following way: On the contact lens box, read the prescription information from left to right. Why it's so important to stick with the prescription given to you.
When you go for an eye test your optician is legally obliged to give you a prescription and you are free to buy your contact lenses anywhere you like. These numbers often change (or disappear) between your glasses prescription and your contact lens prescription, especially with higher powers. The eye column will contain either od, os or ou, which mean right eye, left eye or both eyes, respectively.
Like clothing, just because you're a bc 8.6 in one brand doesn't mean you'll be the same in another brand; A written prescription usually includes the following specifications: Each of your eyes may have different challenges to correct.
Even the power of the lenses is generally not the same as in your eyeglass prescription. Sphere power is positive if you are farsighted and negative if you are nearsighted. Base curve (usually a number between 8 and 10) if your brand only comes in one base curve, your prescription will not contain a bc value;
So the eyeglass prescription must account for that distance as well. How to get a contact lens prescription. If you find the information displayed above on your prescription, you have a contact lens prescription.
Read the power (pwr) of the lens strength (it may be different for each eye), measured in diopters. This is typically one to two years from the date that the contact lenses were fitted. Lens power is measured in diopters (d), a unit that specifically describes the optical power of a lens to bring objects into focus.
Where to get a contact prescription. The three main measurements on your contact lenses are power, base curve and diameter. This is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia.
Now that you know who can or can’t wear contact lenses, it’s time to get the contact lens fitting started. Your prescription will also contain an expiration date. On the contact lens box, read the prescription information from left to right.
A contact lens prescription is not the same as an eyeglass prescription. Od stands for oculus dexter which is latin for right eye. The eye column will contain either od, os or ou, which mean right eye, left eye or both eyes, respectively.
Usually listed first after od, os, or ou, indicating the strength of correction needed for that particular eye. In addition to the lens power, your contact lens prescription contains several other pieces of information related to the size of the lens. The prescription should unfold in the following way:
So let's dive into the details of this example. The first step is to determine the power of contact lenses needed for your patient. For new contact lens wearers, this video will be especially handy in helping you to learn how to read your prescription correctly.
The number appearing in this section of the prescription is always a plus power, even if it is not preceded by a plus sign. In addition to lens power, a contact lens prescription contains several other pieces of information related to the size, color, brand, and expiration dates of the lenses. To read a contact lens prescription, start by looking at the strength of correction, which is indicated by a minus sign for nearsightedness and a plus sign for farsightedness.
Read the measurement of the diameter (dia), given in millimeters; The contact lens sits on the surface of your eye, while your eyeglasses sit about 12 mm in front of your eye In theory, multifocal contact lenses are the perfect solution for contact lens wearers who need a little extra help reading things up close.
Yours will likely look different but should contain the same information. This tells you what eye the prescription is for. Additionally, refer to od and os to determine the nearsightedness or farsightedness in the right and left eye.
Indicates how curved the inside of your lens is, usually ranging from eight to 10. To do this so it is crucial to know how to convert a glasses prescription to contact lenses. Reading the contact lens power.