Prescription Information & Lens Options

Entering Your Prescription Information

From the prescription your eye doctor gave you, enter the Sphere, Cylinder, Axis, Pupil Distance and ADD (optional) values on the product page. These values must be entered correctly. For example, a Sphere value of -.075 is not the same as +.075. The Pupil Distance (PD) measurement may not be shown on your prescription, but it is necessary to make your glasses. Call your eye doctor for this value. They should have it in their records. 

If you enter incorrect prescription information such as an inaccurate pupillary distance measurement, you may not be able to see well with your new glasses. We cannot be responsible for mistakes in prescription information provided by you or your doctor. We guarantee that your prescription safety glasses will be made exactly to the specifications that you provide.

If you have any questions about entering this information, fill-out as much as you can, place the order, then email your prescription to us at info@medicalsafetyglasses.com along with your order number. We will fill-out the rest of the information and check the order for accuracy. 

LENS OPTIONS

  • Single Vision – Single vision occurs when an individual is near sighted or far sighted, but not near sighted and far sighted.
  • Digital Single Vision – Conventional lens-making assumes that the lens is flat and that the wearer looks through it straight on, so there may be some distortion on the outer edges. We utilize innovative digital surfacing technology (DST) to ensure distortion-free viewing at all angles. DST solves the problems that arise from conventional lens-making to give a clearer and better lens overall.
  • Bifocal FT-28 – A lens with two points of focus – usually one for distance and one for near vision. Bifocal portion of lens is in the shape of a half moon.
  • Progressive Bifocal – A no-line multi-focal lens that includes all corrections, from distance to close-up, in one lens without any separation of the visual zones by a line.

PUPIL DISTANCE Measurement 

We need your PD (Pupil Distance) measurement to accurately make your prescription glasses.

If you have two pupil distance (PD) numbers (Left PD and Right PD) on your prescription, you must add the two numbers together and enter that number in the first PD Binocular field. This is required. You can then enter the left and right PD numbers in the second PD Monocular field. 

You can call your eye doctor for this measurement, or you can measure your own PD using a mirror and a millimeter ruler. Your prescription does not typically show the pupil distance measurement.

To measure the PD yourself, place the ruler flat against your forehead and with your right eye closed, line up the zero on the ruler with the center of your left pupil.
With your left eye closed, take a reading of the ruler at the center of your right pupil.

If you have difficulty seeing what you are doing, then use a magnifying mirror. If it is easier, line up the outside of the iris of one eye with the inside of the iris of the other eye and use that measurement.

LENS MATERIAL

  • Plastic – Plastic is lightweight and more impact resistant than glass but it scratches easily.
  • Polycarbonate –  is the most impact resistant material available for glasses. 
  • Polycarbonate is UV resistant and about 50 times stronger than other lens materials.
  • High Index Plastic – Lenses correct vision by bending light as it passes through the lens. High index plastic lenses are able to bend light more than the conventional plastic used for lenses. This means that high index plastic lenses are thinner and lighter than conventional plastic lenses. High Index 1.74 lenses are the thinnest, flattest, and most cosmetically appealing lens ever developed. These ultra thin lenses are nearly 50% thinner than plastic and 5% thinner than 1.67 high index lenses, offering you the ultimate in technology and cosmetics.
  • Trivex – Trivex is a high impact lens with optical qualities closer to glass lenses. It has an index of refraction of 1.53, the same as glass or standard plastic so high prescriptions will be thicker. Trivex Material has UV protection built into the lens.

Lens Color