How To Order Prescription Pilot Sunglasses Online
When you are considering the purchase of prescription sunglasses online there are a number of things you need to know before placing your order.
The first thing you will need is a prescription for lenses that is less than one (1) year old. You can go to any optometrist and get your eyes examined and get the prescription from the optometrist.
Your Eyeglass Prescription: It’s Yours To Keep
You need not worry about getting your prescription from the eye doctor because in 1980 the Federal Trade Commission passed the Prescription Release Rule which became law.
The rule requires eye doctors (both optometrists and ophthalmologists) to give patients a copy of their eyeglass prescription at the end of an eye exam.
Your eye doctor must give you a copy of the prescription whether or not you ask for it. Eye doctors may not condition the release of your prescription on your agreement to purchase eyeglasses from them, nor may they charge you an extra fee to release your prescription. They also may not disclaim liability for the accuracy of the prescription if you purchase eyeglasses elsewhere.
What You Need To Know
There are a few things you need to do prior to ordering a pair of prescription pilot sunglasses online:
- You will need an eyeglass prescription that is less than one (1) year old;
- Decide whether you want Single Vision, Bi-Focal or Progressive lenses;
- If you want sunglasses decide on the Lens Tint you want;
- You will need to select the frame you want your lenses in.
Understand Your Prescription
The first step in understanding your eyeglass prescription is what the abbreviations “OD” and “OS” mean. They are the abbreviations for the Latin terms oculus dexter and oculs sinister.
“OD” means the right eye and “OS” means the left eye.
However, some doctors and opticians have decided to update their prescriptions and use “RE” (right eye) and “LE” (left eye) instead.
You may have noticed that on your prescription form the information for the right eye (OD) comes before the information for the left eye (OS). Eye doctors write prescriptions this way to avoid making errors, because when they face you, they see your right eye at left (first) and your left eye at right (second).
Other Terms Used In Your Eyeglass Prescription
Sphere (SPH): This number correlates to the amount of lens power, measured in diopters, prescribed to correct nearsightedness or farsightedness.
If the number for Sphere has a minus sign (-) then you are nearsighted; if the number for Sphere has a plus sign (+) or is not preceded by any sign your are farsighted.
Cylinder (CYL): This is used to indicate the amount of lens power for astigmatism.
If nothing appears in this column then you have little or no astigmatism.
Pupillary Distance (PD): This number is the distance between the center of your pupils (the black dots in the middle of your eyes).
An accurate PD measurement is critical if you are getting progressive lenses.
Decide On Single Vision, Bi-Focal or Progressive Lenses?
Single Vision Lenses
Single vision lenses have the same optical focal point or correction over the entire area of the lens. Single vision lenses correct for only one distance. If they correct for far distance, the person must accommodate (accommodation acts like a reflex which means the human eye can change focus from distance to close up in 350 milliseconds) to see clearly up close.
If the person cannot accommodate, they may need a separate pair of single vision glasses for near distances, or else use a multifocal lens
Bifocals contain two lens powers which are typically separated by a thin line running horizontally across the lens.
Bi-focal lenses usually are prescribed for adults over age 40 to compensate for presbyopia.
In these cases, the bottom portion of the bifocal lens reduces the amount of focusing effort required to see near objects clearly.
Progressive lenses will allow you to enjoy bifocal vision without the bifocal line look. Progressive lenses help increase edge-to-edge clarity and offer a full range of vision correction, from up-close objects to those in the distance.
With progressive lenses there is no taking off one pair of glasses to put on another and no peering over the bifocals as your grandmother may have done.
Progressive lenses allow a more natural, flattering way of seeing your world.
Decide On The Lens Tint You Want
Today there are many lens tints available to you. If you want prescription sunglasses then you will want a lens tint that allows 12-18% of visible light through to your eye.
There are two basic lens tints for sunglasses – neutral gray or tan (amber, brown).
Neutral Gray Lenses
Neutral gray will have a visible light transmission level of approximately 16%. In other words, the lens will allow approximately 16% of visible light to pass through the lens and reach your eyes.
This should be dark enough to handle most glare.
The advantage of neutral gray lenses is that they provide absolute true color reception. Time tested by U.S. Military Pilots and NASA Astronauts, neutral gray lenses allow all colors to come through naturally without any color distortion resulting in hours of comfort.
The neutral gray lens tint is ideal for driving, flying airplanes and everyday use.
Tan (Kontraster) Lenses
We recommend pilots carry two (2) pairs of sunglasses with them at all times, one pair with neutral gray lenses and one pair with tan lenses.
Polarized lenses may help eliminate a little more glare by getting rid of some of the reflected glare off water or other shiny flat surfaces, but there are disadvantages to polarized lenses as well.
The disadvantage of polarized lenses is that they “black out” LCD (Liquid Crystal Displays) that are common in automobile speedometers, moving map displays and radios.
Most sunglasses with photochromic lenses don’t work in cars because the glass windshield blocks the uv rays which cause the lenses to darken when struck with them. However, Serengeti sunglasses with Drivers Gradient lenses will work in cars.
Serengeti amber colored Drivers lenses enhance colors, contrast while lightening and darkening for optimal light transmission in any driving condition. And their ability to relax eye muscles reduces eye stress and eye fatigue.
Decide On The Frame You Want
The last item you will need to choose is the frame that you want your new prescription lenses in.
We offer the following frames for you to choose from: