How do you read a contact lens prescription?

Here are the definitions of the symbols/abbreviations used in a typical contact lens prescription:

Eye – Which eyes the prescription line item is for.
SPH – Sphere (this can also be referred to as Power or PWR)
BC – Base Curve (usually a number between 8 and 10)
DIA – Diameter (usually a number between 13 and 15)

What does the negative number on contacts mean?

myopia
SPHAlso referred to as Power or PWR, this field references the corrective factor of the contact lenses. A negative number, such as -2.25, in this field indicates myopia, (nearsightedness), while a positive number like +2.25 indicates hyperopia (farsightedness).

How can you tell left from right contact?

Gently squeeze the lens, as if you are about to fold it in half. If the edge of the lens points upward (resembling a hard-shell taco), the lens is correctly oriented. If the edge bends outward (toward your thumb and finger), the lens is inside out.

What is the sphere number on contacts?

Sphere (SPH) – The term “sphere” means that the correction for nearsightedness or farsightedness is spherical, equal in all meridians of the eye. This indicates the amount of lens power, measured in diopters (D), prescribed to correct nearsightedness or farsightedness.

How bad is my vision if my contacts are?

In the United States, an individual has legal blindness if: Their vision with glasses or contacts is 20/200 or worse, or. Their visual field is 20 degrees or less in the better-seeing eye.

What is the highest strength of contact lenses?

about -12 Dioptres
The highest level of corrective power for monthly soft contact lenses is about -12 Dioptres (bear in mind that the average prescription for short sighted people is -2.00 Dioptres), and is available from both Purevision 2HD and Biofinity.

How do I find the power of my contacts?

You can find your prescription on the piece of paper given to you by your optician during a check-up, on the end/side of your contact lens box or on the blister packs that contain your contact lenses.

How do you read a contact lens prescription? Here are the definitions of the symbols/abbreviations used in a typical contact lens prescription: Eye – Which eyes the prescription line item is for. SPH – Sphere (this can also be referred to as Power or PWR) BC – Base Curve (usually a number between 8 and…