Single vision lenses can be used for Distance, Intermediate or Near. This option gives the wearer a full lens for viewing objects at a specific distance.
Bifocal lenses have a reading segment that has either a 'D' or a 'Round' shape. The 'D' segment we use is a D28 Bifocal. These are most suitable for prescriptions with a '-' sphere. Round segments are most suitable for prescriptions with a '+' sphere. The type of round segment bifocal we supply is a Round 24 Bifocal. The numerical value for the bifocal segment refers to its diameter in millimeters. Please discuss wearing bifocals with your optometrist before selecting this option. Varifocal lenses have the appearance of a single vision lens but enable the wearer to view objects at all distances by using different parts of the lens. Please discuss wearing varifocals with your optometrist before selecting this option. Prescription Details Please make sure you can clearly read your prescription before entering the details. If you have difficulty reading your prescription, please email customerservices@glassesandsunglasses.co.uk for help. Your prescription is made from a combination of the Sphere, Cylinder, Axis and Add. If your prescription includes a prism, you should order your spectacles from your local optician. There may also be a value for your 'PD' or pupillary distance. Everything written on your prescription must be inserted on your online order. The Sphere and Cylinder value will have either a '+' or '-' sign infront of it please ensure you pay special attention to this sign. These are some common terms and abbreviations you may see on your prescription: Sphere - SPH - D.S. - DS - Diopter Sphere
Cylinder - CYL
X - Axis
∞ - PLANO or INFINITY
BAL - BALANCE Information Required for different types of spectacles. Distance Spectacles: You should input your distance prescription. Reading Spectacles: You should input your distance prescription and your ADD Bifocal Spectacles: You should input your distance prescription and your ADD
Varifocal Spectacles: You should input your distance prescription and your ADD You may have an ADD for both Near and Intermediate distances. If this is the case, you should choose the ADD for the distance you require. If you are in any doubt, please telephone or email us with your query before you enter any prescription information. |
