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So, you’ve just had an eye exam and your optometrist or ophthalmologist has given you an eyeglass prescription. He or she probably mentioned that you are nearsighted or farsighted, or perhaps that you have astigmatism. (If that’s not the case, and you need to see an eye doctor, click here to find one near you.)
But what do all those numbers on your eyeglass prescription mean? And what about all those abbreviated terms, such as OD, OS, SPH and CYL?

What OD And OS Mean

The first step to understanding your eyeglass prescription is knowing what “OD” and OS” mean. They are abbreviations for oculus dexter and oculus sinister, which are Latin terms for right eye and left eye.

Your eyeglass prescription also may have a column labeled “OU.” This is the abbreviation for the Latin term oculus uterque, which means “both eyes.”

Prescriptions written for eyeglasses, contact lenses and eye medicines, some doctors and clinics have opted to modernize their prescriptions and use RE (right eye) and LE (left eye) instead of OD and OS.

On your eyeglasses prescription, the information for your right eye (OD) comes before the information for your left eye (OS). Eye doctors write prescriptions this way because when they face you, they see your right eye on their left (first) and your left eye on their right (second).

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Sphere (SPH). This indicates the amount of lens power, measured in diopters (D), prescribed to correct nearsightedness or farsightedness. If the number appearing under this heading has a minus sign (–), you are nearsighted; if the number has a plus sign (+) or is not preceded by a plus sign or a minus sign, you are farsighted.

The term “sphere” means that the correction for nearsightedness or farsightedness is “spherical,” or equal in all meridians of the eye.

Cylinder (CYL). This indicates the amount of lens power for astigmatism. If nothing appears in this column, either you have no astigmatism, or your astigmatism is so slight that it is not really necessary to correct it with your eyeglass lenses.

The term “cylinder” means that this lens power added to correct astigmatism is not spherical, but instead is shaped so one meridian has no added curvature, and the meridian perpendicular to this “no added power” meridian contains the maximum power and lens curvature to correct astigmatism.

The number in the cylinder column may be preceded with a minus sign (for the correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism). Cylinder power always follows sphere power in an eyeglass prescription.

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Meridians of the eye are determined by superimposing a protractor scale on the eye’s front surface. The 90-degree meridian is the vertical meridian of the eye, and the 180-degree meridian is the horizontal meridian.
Axis. This describes the lens meridian that contains no cylinder power to correct astigmatism. The axis is defined with a number from 1 to 180. The number 90 corresponds to the vertical meridian of the eye, and the number 180 corresponds to the horizontal meridian.

If an eyeglass prescription includes cylinder power, it also must include an axis value, which follows the cyl power and is preceded by an “x” when written freehand.

The axis is the lens meridian that is 90 degrees away from the meridian that contains the cylinder power.

Add. This is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia.

Prism. This is the amount of prismatic power, measured in prism diopters (“p.d.” or a superscript triangle when written freehand), prescribed to compensate for eye alignment problems. Only a small percentage of eyeglass prescriptions include prism.

When present, the amount of prism is indicated in either metric or fractional English units (0.5 or ½, for example), and the direction of the prism is indicated by noting the relative position of its “base” or thickest edge. Four abbreviations are used for prism direction: BU = base up; BD = base down; BI = base in (toward the wearer’s nose); BO = base out (toward the wearer’s ear).

Sphere power, cylinder power and add power always appear in diopters. They are in decimal form and generally are written in quarter-diopter (0.25 D) increments. Axis values are whole numbers from 1 to 180 and signify only a meridional location, not a power. When prism diopters are indicated in decimal form, typically only one digit appears after the period.

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Even brand-new things can break eventually if they get in the way of a force stronger than them. It is not so unusual for kitchen equipment that you bought just a few years ago to get broken or damaged. What do you do when that happens? If the cause of the damage is not complicated or severe, you can just repair it by yourself. But what happens when something is beyond your DIY set of skills? You call a repair service. Same thing goes for your roofing system. People don’t often think about their roof, at least while there is no water pouring in their living room or they want to sell it. You must keep in mind that your roof is constantly getting hit by outside elements that can damage it over time. Things like rain, sunlight, heat, cold, UV rays, hail, snow, ice and high winds that can carry debris like dust particles and branches are regularly colliding with your roofing system that stands tall on your residence.

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NEW ORLEANS (AP) — Tears of relief and joy flowed in a New Orleans courtroom Thursday as prosecutors formally dropped charges against a man who spent 23 years behind bars for a 1992 crime spree that included rape, robbery and the slaying of a British tourist.

Legal advocates working on behalf of Robert Jones had long argued that the case was “riddled with prosecutorial misconduct,” dating back to former District Attorney Harry Connick’s days in office.

An appeals court had thrown out Jones’ convictions in 2014. He was released on bond in 2015. On Thursday, his 44th birthday, he walked out of the criminal courthouse no longer under curfews or other bail-related restrictions.

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SAN FRANCISCO (CBS SF) — Police are asking for the help from anyone who may have witnessed a collision that killed a pedestrian late Saturday night in San Francisco.

Officers responded at 11:30 p.m. to Lake Merced and Font boulevards where nearby a 77-year old woman was crossing Lake Merced Boulevard when she was hit by a pickup truck.

The driver of the truck stopped and cooperated with police.

Officers said neither drugs nor alcohol appear to have played a role in the collision.

Police said they believe the occupants of a two-door white car may have witnessed the collision and police are asking the people to call (415) 553-1641 or (415) 553-9516 if they can provide information about the fatality.

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Posted on Oct 23, 2012 in Toothache |

Knowing some effective home remedies which you can use for toothache is a valuable thing and that is because the pain they can cause can be absolutely horrid. Read on to find helpful tips and some fantastic natural remedies that will help you to manage and even cure a nasty toothache.

Toothache pain image of agonized woman face

Some people experience constant toothache ranging from minor to intense annoying aches and unbearable pain that call for immediate attention. There are also those who suffer from chronic toothache that has no underlying dental relations which might tempt them to think that their condition has no available relief.

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Do you have bleeding gums?

It’s never a great sign when blood is present. For our teeth and gums, this is no different. If you notice blood after performing your daily oral care duties such as brushing and flossing, then you may have a deeper issue. We’ll help you discern the different possibilities that bleeding gums may be indicative of.

Now, before you panic, gum disease is a lot more common than you think. It also happens to be a disease that can be easily addressed with the right treatment and follow up at home.

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Let’s start by giving you a quick background on cryotherapy and where it originated. The word “Cryotherapy” derives from the greek words “cryo” meaning cold, and “therapeia” meaning cure. Thus, Cryotherapy is a curative health treatment involving subzero temperatures.

Now, Cryotherapy was first discovered in 1978 by Dr. Yamauchi of Japan who started to trial freezing treatments of short duration to help aide the pain process in his patients suffering from rheumatoid arthritis. While trialling these methods, Dr. Yamauchi found that he could significantly reduce soreness and pain in his patients if he just used this cold therapy prior to manipulating their joints.

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Trump being elected has caused lots of turmoil for people surrounding health care, education, immigration, and marriage. Yes, Trump is causing turmoil for those who are immigrants and looking to get married. With their futures uncertain many immigrants, and their

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  With summer slowly starting to die down that also means that wedding season is also coming to end. But don’t fret my pet. Just because wedding season is winding down that does not mean weddings themselves are stopping. I

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