How Do You Know What Your Prescription Type Is

For those who wear corrective lenses and need to protect their optics from radiations, we offering iii different prescription lens types for our pb glasses. Subsequently reading this mail you will understand the different types of prescription lens types that we offer, eyeglass prescription terminology, and what prescription information is needed to properly identify your order.

Before placing your guild, information technology is important for y'all to understand the differences betwixt the various corrective lenses before making your decision. Lead glasses provide you with the necessary middle protection to assist reduce your risk of developing cataracts from prolonged exposure to ionizing radiations. In the past, those who wore cosmetic lenses would oft be required to wear bulky radiation safety goggles or fit over lead glasses. However, a number of the lead spectacles that nosotros at present offering are bachelor with various types of prescription lens.

Prescription lens types:

• Single vision prescription lenses
• Lined bifocal prescription lenses
• Progressive bifocal lenses

Single Vision

Single vision prescription lenses have the same magnification throughout and right for only ane distance. These lenses are designed to right weather condition such as myopia (nearsightedness¹), hyperopia (farsightedness), and astigmatism². Our single vision prescription radiation safe lenses offer the industry standard 0.75mm lead equivalency and are manufactured using SCHOTT SF-6 HT radiation resistant glass.

How practice I know if I have a single vision prescription?

To illustrate, an case of a single vision prescription is shown below. While reviewing the sample prescription, you may notice several abbreviations, listed below are mutual terms found on eyeglass prescriptions. If your prescription doesn't have whatsoever values or abbreviations in the ADD column, you take a single vision prescription.

	Unmarried Vision Prescription Lenses
Rx		SPHERICAL	CYLINDRICAL	AXIS
	O.D.	-two.00	-0.50	xl
	O.Southward.	-1.75
			Pupillary Distance	65

Prescription Abbreviations & Terminology

• OD – Oculus Dexter, from the Latin word dexter meaning "right", means the right center.
• Bone – Oculus Sinister, sinister which is derived from the Latin word sinistra meaning "left manus", means the left eye.
• SPH – Spherical, is the principal forcefulness of the lens prescription, and is written in 0.25 increments. It is also referred to as power and is abbreviated as PWR.
• CYL – Cylinder, this will only appear on your prescription if yous have an astigmatism, and is written in 0.25 increments. It is possible that this will only utilise to one heart. If y'all don't have an astigmatism, your physician may leave this field blank, or they may choose to put '00', 'DS', SPH', or 'Plano' in this field. If the field has i of those abbreviations you will know that you don't take an astigmatism correction in one or both optics.
• AX – Axis can be abbreviated as AX, or just X. If the cylinder field is left blank or has whatsoever of the post-obit abbreviations including '00', 'DS', SPH', or 'Plano', this field volition exist left blank or take an '0'.
• PD – Pupillary distance or interpupillary distance (IPD) is the distance (industry standard is in millimeters) between your right pupil and left pupil. The PD is usually written in the lower row labeled P.D. on your prescription.

Single-Vision Pupillary Distance

• Binocular P.D. – 65
• Monocular P.D. – thirty/thirty.five  (Os/OD)

Bifocal/Progressive Pupillary Altitude Binocular

• Nearly/Reading P.D. – 62
• Altitude P.D. – 65

The American Optometric Association states that Astigmatism is a vision condition that causes blurred vision due either to the irregular shape of the cornea, the clear front encompass of the eye, or in other cases the curvature of the lens within the middle. Astigmatism is a particularly common vision condition.

Lined Bifocal

Bifocal prescriptions are for patients who take difficulty seeing both far and near. They are usually prescribed to individuals with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism. Every bit their name suggests, lined bifocals offer altitude correction on the upper portion of the lens, and virtually vision correction on the bottom portion of the lens. Lined bifocal lenses, provide two distinct optical powers with different focal lengths – 1 for afar vision and ane for well-nigh vision. The well-nigh vision lens has a semicircle (bottom) that measures 28mm wide and has a flat-superlative (top). Traditional lined bifocal lenses are separated past a visible line.

Progressive Bifocal

Progressive bifocals, or simply progressive lenses, allow you to experience bifocal vision without the traditional bifocal lines. Progressive lenses provide you with a more than natural way of seeing. Presbyopia³ is a common vision condition for those over the historic period of twoscore where the eye has difficulty focusing on most-field objects. Individuals who have worn traditional bifocals in the past may have experienced "image jump", this occurs when in that location is an abrupt break from altitude to near-field vision. Progressive bifocal lenses provide  you with optimum vision and a seamless progression of lens strength.

How do I know if I have a bifocal prescription?

If yous notice that at that place are numbers in the ADD cavalcade of your prescription, y'all accept a bifocal prescription.

	Lined Bifocal/Progressive Bifocal Prescription Lenses
Rx		SPHERICAL	CYLINDRICAL	AXIS	Add
	O.D.	-2.00	-0.50	40	+1.75
	O.S.	-ane.75			+two.00 PAL
			Pupillary Altitude	65

ADD – Add is the value ordinarily used for bifocal or progressive lenses. ADD indicates how much ability is added to the distance prescription to create the reading-only prescription. Add corrections volition usually have the same value for both eyes. The abbreviation PAL may appear next to one of the numbers in the Add together field, or it may be written elsewhere on your prescription, this indicates that your doctor determined that yous will need a different ADD correction for progressive lenses.

PAL– Progressive additive lens (ADD value specifically for progressive bifocal lenses).

Ordering Data

We promise that this post has provided you with helpful information that you lot volition assistance you during your inquiry. To review, nosotros covered the different types of prescription lead glasses that we offer, common terminology and abbreviations found on your prescription, and what prescription data we need to properly identify your prescription lead glasses order. When ordering, please fax or email your prescription (Rx) including your pupillary distance (PD). For your convenience, prescription data can also be noted in the "Social club Comments/Special Instructions" section under "Payment Information" while checking out.

Delight notation: Lens enhancements options are not available in combination with prescription lenses.

Questions? Comments?

If you have any questions regarding the different types of prescription lead spectacles that we offer, please feel gratis to contact us via live chat or simply go out a comment below.

Sources:

American Optometric Association – Eye & Vision Problems

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Source: https://blog.universalmedicalinc.com/3-different-types-prescription-lead-glasses/

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