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What is eyeglasses prescription?
An eyeglass prescription is a pad issued by your eye doctor after an eye exam, specifying all the numbers and signs which may be used for us to process eyeglasses for you.  Sample prescriptions are listed below: In 1978, the Federal Trade Commission passed a regulation rule known as Ophthalmic Practice Rule...
What is PD?
Your PD stands for Pupillary Distance, which is the distance between your pupils in millimeters. Your PD is very important for accurately fitting your lenses to achieve visual acuity. Generally speaking, the PD number of adults stays the same. The average PD for adults is 55-75 mm and for kids is...
Can I use my contact lens prescription to buy my eyeglasses from you?
No. Contacts prescription and eyeglasses prescription are different. The contacts prescription cannot be used to process eyeglasses. You could check with your doctor what your correct eyeglasses prescription is....
Can I use the copy of my eyeglass prescription which was issued by my doctor 3 years ago?
No. We strongly suggest you use your eyeglass prescription in the most recent 2 years to order with us. Actually, Eye Care Professionals (ECPs) suggest an eye exam every six months or one year to detect any possible eye diseases in the earlier stage....
Can I save my prescription?
You can add and save your prescription for permanent use in your Grinoo account, to avoid filling it every time for new order.  1. Log in your account 2. Go to your Account Center and choose " My Prescription"  3. Click on "Add New Prescription"  4. Upload your prescription picture or enter your prescription...
How to read my prescription?
Rx:     OD=the right eye OS=the left eye OU=each eye RX=prescription SPH=Sphere=Spherical, indicates the amount of lens power, prescribed to     correct nearsightedness or farsightedness. If the number appearing under this heading has a minus sign (–), you are nearsighted; if the number has a plus sign (+) or is not preceded by a plus...
How to read PD?
Your PD may be written in three ways: PD (OU), written as "64", means the Binocular PD which is for both eyes. PD (OD), means the Monocular PD for the right eye, PD (OS), means the Monocular PD for the left eye. A Monocular OD is written as two numbers, for example, "32/30",...
How to fill in the prescription with prism?
Upload the original prescription picture at our website directly. We could only make single vision glasses for prescription with prism right now. And you need to pay extra $9 for prism prescription. ...
Can I fill in strong prescription?
We offer glasses with SPH from -18 to +10, and CYL -4.50 to +4.50. If your SPH/CYL is beyond this rage, please send your original prescription to service@grinoo.com for checking. With a strong prescription, you are suggested to choose a full frame (better made of acetate material) with narrow and small lens. ...
How to read TABO prescription?
The TABO prescription may be different from the international prescription. Sometimes, the Axis of TABO prescription need to be transferred before filling the prescription at our site. (Uploading prescription is recommended, which will avoid mistakes when filling in Rx form. Our professional optometrists will help identify your prescription. )   Rules: If the Axis is...
How to measure PD?
How to Measure PD? PD is very important for accurately fitting your lenses to achieve visual acuity. Generally speaking, the PD number of adults stays the same. The average PD for adults is 55-75 mm and for kids is about 42-55 mm. A difference about 2-3 mm is allowable. Checking with your doctor is recommended....
Knowledge about Eyeglasses Prescription
1. Myopia Myopia, or nearsightedness, is the most common refractive error of the eye. If you are nearsighted, you typically will have difficulty in seeing distant objects clearly but will be able to see well for close-up tasks such as reading and computer use. If there is a minus in your...
How to upload prescription?
Uploading original prescription photo is recommended, which will avoid mistakes when filling in Rx form. Our professional optometrists will help check and identify your prescription.  There are two ways to upload your prescription photo. A. Upload when you order Step 1.Please click "Add New" button.  Step 2.Upload your prescription picture by clicking the Select RX...
Helps for common discomforts
New glasses The light transmittance of new glasses is higher. So you may feel brighter compared to old ones. It usually takes several days to get used to new glasses.    New Prescription Some customers may feel the prescription is strong and a bit painful in the eyes.Usually, it takes about one week to adapt...
What is ADD?
The Add, short for Reading Addition, is the additional correction required for reading. It can be used to make either reading glasses, bifocal glasses or multifocal glasses.  This figure is an indication of how much extra power is required ‘on top’ of the distance prescription for near or intermediate glasses. This...