Useful Terms

The following useful terms will help you through the order process and are essential to reading your prescription and using that information to order glasses online.

Your Prescription Choices

Distance – Single Vision - Single vision lenses for distance/nearsighted/shortsighted corrections (myopia).

Progressive - For Distance, intermediate and near vision with a smooth transition and no bifocal line.

Bifocal with Line - Multifocal, for Distance and near vision with two distinct fields of vision separated by a bifocal line.

Reading (Prescription) - Single vision lenses for close up/farsighted/longsighted corrections (hyperopia).

Fashion - Non-prescription clear lenses, for fashion or if you want to fit your own lenses.

Readers (OTC) - Non-prescription Over-The-Counter lens for magnification purposes (Reading) only.

How do you wear your glasses?

Typical Use

Normal (day-to-day) - For everyday use, the glasses sit comfortably on the face.

Sports/Outdoors - For sports use, typically the glasses are tighter to the face.

Typical Position

Normal – High on the nose - glasses sit comfortably on the nose.

Middle of the Nose - Glasses are worn lower, towards the middle of the nose.

Low on the Nose - Glasses tend to be perched on the lower tip on the nose.

Your Prescription Details

O.D. - The Right Eye (Oculus Dexter).

O.S. - The Left Eye (Oculus Sinister).

SPHERE - The sphere (SPH) number denotes the strength of the lens , in Diopters (Δ).

CYLINDER - Indicates the presence of Astigmatism. If Cylinder (CYL) is none, astigmatism is not present.

AXIS - If Astigmatism is present, represents the necessary correction, in degrees.

ADD - The (positive) Addition , in Diopters (Δ), required for close up (reading) prescriptions.

PRISM CORRECTIONS - If present, corrects vision displacement, just as double vision, or for people whose eyes are not perfectly aligned.

PRISM VALUE - Prism, in Diopters (Δ), necessary to correct eye alignment.

BASE DIRECTION - Direction (Up, Down, In, Out) in which to apply the corresponding Prism Value alignment.

PUPILLARY DISTANCE (PD) - The horizontal distance (mm) between the center of your pupils. It ensures the center of each lens is correctly aligned with the pupil of each eye.

PRESCRIPTION DATE - Must be within the last two years to be valid.

ADDITIONAL INFORMATION - Any special requests or other relevant information.

POWER - The magnification required for your reading glasses, in Diopters (Δ)

Lens Thicknesses

Standard (1.5) - Our Standard 1.50 Index lenses are made of CR-39 Plastic and provide excellent optical quality and are ideal durable lens for everyday purposes. Recommended for low prescriptions with SPH ranging from -2.00 to +2.00. If your prescription is above +/-2.00, we recommend that you upgrade your lens.

Thin and Lite (1.56) - Our Thin and Light 1.56 Index lenses are up to 15% thinner than Standard 1.50 index lenses and are recommended for those with moderate prescriptions who would like a lighter and thinner lens. Recommended for prescriptions with Sphere (SPH) values in the range -4.00 to +4.00

Polycarbonate (1.59) - Our Polycarbonate 1.59 Index lenses are highly impact resistant and are ideal for sporting activities, as well as for children's glasses, and they also block 100% of harmful UV rays. Recommended for prescriptions with Sphere (SPH) values in the range -4.00 to +2.00

Super Thin (1.61) - Our Super Thin 1.61 Index lenses are up to 20% lighter and thinner than Standard 1.50 index lenses and are recommended for those with moderate to high prescriptions with Sphere (SPH) values in the range -6.00 to +4.00.

Ultra Thin (1.67) - Our Ultra Thin 1.67 Index Aspheric lenses are up to 30% thinner than Standard 1.50 index lenses and are recommended for Prescriptions with Sphere (SPH) values above +/- 4.25.

As Thin as Possible (1.74) - Our As Thin as Possible 1.74 Index Aspheric lenses are the thinnest, lightest lenses on the optical market today and are up to 35% thinner than Standard 1.50 index lenses and are recommended for Prescriptions with Sphere (SPH) values above +/- 4.25.

Lens Coatings

Scratch-Resistant - Scratch Resistant hard coating protects your lenses against minor scratches.

Anti-Glare - Our premium anti-glare coating to your lens reduces reflection on the surface of the lenses is perfect for computer use and can help makes night time driving easier.

UV Coating - Give your eyes more protection! Overexposure to UV light may cause eye problems that are preventable by placing a UV coating over the lens. Invisible to the naked eye, our UV (ultraviolet) coating provides superior protection for the eyes without changing the appearance of the lens.

Water-Resistant - A special Water-Resistant (Hydrophobic) coating that also improves the scratch-resistance.

Oil/Fingerprint-Resistant - A special Oil/Fingerprint (Oleophobic) coating.

No Tint - Scratch Resistant hard coating protects your lenses against minor scratches.

Color Tint - Our premium anti-reflective coating to your lens reduces reflection on the surface of the lenses is perfect for computer use and can help makes night time driving easier.

Photochromic Lens - Photochromic lenses darken in sunlight and remain clear indoors.

Polarized Lens - Polarized lenses reduce glare from shining surfaces such as snow, water and windshields.


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