Understand your prescription
Let's decode and make you knowledgeable about your prescription
Understanding eyeglass prescription terms
Read more on understanding your prescription
How to know type of prescription?
Below is the explanation to tell whether it is for a single vision or bifocal / progressive lenses
Single Vision prescriptions are for those who have trouble seeing either near or far (but not both). This prescription has no value in the ADD column.
|Right Eye (OD)||+1.75||-1.50||40||60|
|Left Eye (OS)||-1.50|
Bifocal / Progressive Vision
Bifocal prescriptions are for those who have trouble seeing both near and far objects. These prescriptions have value in the ADD column.
|Right Eye (OD)||+0.75||-1.00||120||+1.75||60|
|Left Eye (OS)||+0.75||-0.50||110||+1.75|
What is legally blind prescription?
No, it has nothing to do with uncorrected refractive error!
Legally blind was a term coined by government for eligibility of people to special benefits that depends on their vision condition. If your central visual acuity is 20/200 or worse than that is considered to be legally blind. 20/200 patient can see smallest letter at 20 feet which a normal vision person can even see at 200 feet. However, if the vision condition can be made better than 20/200 with the help of glasses or contacts, then the person is not considered to be legally blind.
Our eyeglass prescription and contact lens prescription are not the same. Eyeglass is placed around 12 mm away from the eyes whereas contact lens is directly placed on the eyes, so significantly there's a difference in prescription.
If you are still confused or unsure with your prescription, don't hesitate to contact us.
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