Regular 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)
- Brand - The brand/type of contact lens that your doctor has fitted you for.
Keeping this in consideration, what do the 3 numbers on contacts mean?
astigmatism lens
Subsequently, question is, how do you read the power on a contact lens prescription? Power (pwr) / Sphere (sph) / Dioptre (D): This value is the power of the lens needed to correct your long or short-sightedness and is measured in Dioptres (D). A minus (-) sign indicates that you are short-sighted, whereas a plus (+) sign shows that you are long-sighted.
Also, what does the negative numbers mean on contacts?
myopia
What do the numbers mean in contacts?
The further the number is from zero, the stronger your prescription. It is common to have a different prescription in each eye. BC: Base Curve - this refers to the back curvature of the contact lens, measured in millimeters. This number is usually between 8 and 10.
Related Question Answers
What is high add for contacts?
Reading Your Multifocal Contact Lens Prescription Multifocal contact lenses bundle ADD amounts into three groups: low, medium or high. Low add is a number up to + 1.25, medium is an add between +1.50 and +2.0, and high is an add of +2.25 up to +2.50.Is minus 3.5 eyesight bad?
If your number is between -0.25 and -2.00, you have mild nearsightedness. If your number is between -2.25 and -5.00, you have moderate nearsightedness. If your number is lower than -5.00, you have high nearsightedness.What prescription is legally blind?
It depends. A contact prescription of -6.50 does not mean you are legally blind if your vision improves from 20/200 with them in. However, if you still have 20/200 eyesight or worse after putting contacts in, you are considered legally blind.What happens if you wear contacts with the wrong base curve?
If your lenses have the wrong diameter or base curve, you'll likely feel that something is always in your eye. If the lenses are too flat, your eyelids will tend to dislodge them when you blink. The wrong size lenses can even cause an abrasion of your cornea.What is the difference between 14.0 and 14.2 diameter contacts?
In fact, there is not much difference between these two. Some manufacturers only make 14.2mm diameter contacts, and some others produce 14.0mm diameter contacts. However, there is no manufacturer that makes both 14.0mm and 14.2mm diameter contacts. This is because they only choose one of these two small size contacts.How do you read a left and right contact prescription?
OD is short for oculus dexter, which is Latin for 'right eye. ' OS is the abbreviation for oculus sinister, which sounds like your eye's evil twin — but means 'left eye. ' OD always comes first on a contact lens prescription because that's the eye your eye doctor examines first when facing you, looking left to right.How do I figure out my contact lens base curve?
Base curve = 0.95 * 34.82 D = 33.07 D and then round up or down to the nearest whole diopter to arrive at the following final base curve to use for a contact lens over-refraction: Base curve = 33.00 D (actual measured base curve is 32.95 D)What is a contact lens blister?
The blister packs your contact lenses come in can be recycled in a way that requires very little time and effort. These are made from PP (polypropylene) plastic and are accepted for recycling. You should be sure the blister packs are free of liquid, then you can drop them into the plastic bin.What liquid are contacts packaged in?
Because Saline Solution (the liquid that comes with the lens) doesn't disinfect Contact Lenses. So it's recommended to soak the contact lenses for 6-8 hours in multi-purpose solution or in disinfectant before the first use. This is done to neutralize them before letting them come in contact with your eyes.What does add high or low mean on contact lenses?
The higher the number, the stronger the visual correction needed. The Addition figure is a positive number between 0.50 and 3.00. Some contact lens brands refer to this as a high, medium, or low.How are contacts packaged?
Lenses are generally either packaged in a glass vial, or plastic and foil vacuumed blister pack. The vial or blister will be filled with saline solution, a similar consistency to human tears. The hydrophilic material of the contact lens soaks up the saline solution.What is the power range for contact lenses?
All Contact Lenses contact lenses| Contact Lens Name | Power Range | Diameters |
|---|---|---|
| 1 Day Acuvue TruEye | +6.00 to -12.00 | 14.2 |
| Acuvue 2 | +8.00 to -12.00 | 14.0 |
| Acuvue Advance | +8.00 to -12.00 | 14.0 |
| Acuvue Advance For Astigmatism | +6.00 to -9.00 | 14.5 |
