Pupillary Distance or PD
PD is the distance from the centre of one pupil to the centre the other (the pupil is the black spot in the middle of your eye). If this measurement is not on your prescription please call your Opticians and they will give it to you. Most Optical Stores will measure it for you in under a minute at no cost. The standard PD is set to 60mm (for reading glasses) and 63mm (for distance glasses) by our Dispensing Opticians.

Sphere SPH
There may be a few blank boxes in your prescription (i.e. no 'Sphere', 'Cylinder', 'Axis' and / or 'Add'); you should leave those sections empty. If there is only one number for each eye this is the 'Sphere' power.

In the 'Cylinder' section, some prescriptions may have this number is a plus (+) or minus (-) form, or it may be blank.

If you cannot understand your prescription, please contact us and we will advise you.

Sphere SPH
There may be a few blank boxes in your prescription (i.e. no 'Sphere', 'Cylinder', 'Axis' and / or 'Add'); you should leave those sections empty. If there is only one number for each eye this is the 'Sphere' power.

In the 'Cylinder' section, some prescriptions may have this number is a plus (+) or minus (-) form, or it may be blank.

If you cannot understand your prescription, please contact us and we will advise you.

Tints
These are great for sunglasses; there is an array of colours available to suit every individual.
UV 400 protective
Ultraviolet light from the sun can damage your eyes. You cannot see UV light and it causes damage to your eyes from long term exposure.
UV radiation can cause many eye disorders e.g. cataracts and macular degeneration. A UV coating minimises the risk that UV-A and UV-B rays pose.

Thin Lenses
Thin lenses - also known as High Index Lenses have thinner edges compared to the same prescription made from standard lenses. They are lighter in weight as they require less material.

Polarised Lenses
Polarized lenses cut out reflectance glare. By doing this they improve visual acuity, therefore providing enhanced ability to perceive contrast and improve depth of perception. These lenses are useful for sun wear, driving, water sport activities, improving natural colour contrast. Individuals who play golf and play target sports such as shooting or archery will benefit from these lenses.

Coating
Anti-scratch
This coating protects your lenses against everyday wear and tear. It therefore enables you to have clearer vision for longer and it extends the life of your lens.
Anti-reflective
This lens coating helps protect against glare and surface reflections (e.g. car headlights whilst driving and using a computer screen). The coating also eliminates front lens surface reflectance - this therefore improves appearance as it makes your eyes more visible.

Photochromic Lenses
Photochromic lenses (also known as Transitions – by trademark) change from light to dark depending on the amount of Ultraviolet light they are exposed to. They come with 100% UV protection and glare reduction. They turn dark in sunny conditions and then light again with indoor use.

Lens Type
There are two main types of lenses that are available:
Single Vision (SV)
Bifocals (BF)

Single Vision lenses are the lens types that the majority of our customers order. They are made to your prescription and are made for customers who are short sighted or long sighted - select DISTANCE LENSES. For those who need glasses for close work i.e. reading select READING LENSES.

Bifocal Lenses are for individuals who require two powers in their lenses.Bifocal lenses should only be ordered if tour Optician recommends you do so. we recommends that you ask your Optician to make out a prescription for your glasses assuming that they are worn 12-13mm from the eye (the BVD or Back Vertex Distance).