The Info Examiner

If you want to buy discount specs online then you need to acknowledge a few things first. It is possible to save a vast quantity of cash if you know how to purchase your specs sensibly and it they will be perfectly safe and sound for you to use so long as you become conscious of a few simple rules

Make sure that they fit you properly

If your current spectacles fit OK, then all you need to do is to measure them accurately and you must receive perfect fitting new glasses online.

You need to recognise four measurings:

Total Width - “A” Lens Height - “B” The Lens width - c The Nose/Bridge Width - “D”

A - total width - is the most important thing to measure accurately. Providing you have go the accurate total width, it doesn’t really matter if you have not got the height or width of your lens to get your on-line eyeglasses to be a good fit.

Ensure that you have the exact lens prescription

There are 4 parameters of your eye prescription that you will need to make a note of:

1. Sphere - This is the measure of severity of you near or far sightedness. It is a measure of your lens optical power and is measured in diopters. It invariably will have a positive (+) or a minus (-) symbol in front or above it.
2. Axis - this relates to the reference point which denotes the direction of the power of your lens. It only really applies if you have cylindrical lens though.. It relates to a factor between 1 and 180.
3. Cylinder - Astigmatism is measured using this value. Once Again, there is invariably a plus (+) or minus (-) sign present. You don’t always have this value denoted in a lens prescription.
4. Pupillary Distance (PD) - This part of your prescription helps to centre the lens within your frame on your face. PD is the distance from the center of the pupil (black circle) in one eye to the center of the pupil in the other eye.