What are the steps to read the eyeglass prescription and numbers correctly?

What are the steps to read the eyeglass prescription and numbers correctly?

What are the steps to read the eyeglass prescription and numbers correctly?

  • March 17, 2021


So, you have received the glass prescription, but you are not sure what all the numbers mean. Whenever you get the eye test at the best eye hospital in Ludhiana, you will be assessed for the glasses prescription. Through the assistance of the best eye specialist will help you understand better the precise description and lens correction to let you see clearly. The prescription shows the patient is hyperopic and the eyes lens is needed to correct the vision.

What does the table mean?

While the eye examination is being done, the optometrist will take into account the accurate notes which are measured for each eye.

Sph (Sphere)

This is the number which you might recognize. If you wear glasses, then you might know the lens powder number which might be plus or minus. Through sphere value, the strength is described along with the correction it needs.

For instance, if the number is -2.75 then you are short-sighted and there will be problems viewing the distant objects.

The patients which are of high prescriptions over +/- 4.00, might need to get the BVD (Back Vertex Distance).

Cyl (cylinder)

The cylinder value is linked to astigmatism and helps in knowing about the curvature deviation of the eyeball. Through Cyl, it helps in telling the precise changes which will help you see clearly.


Both Cyl and Axis work in a pair and one without another is not going to work. Its value lies between 1 and 180 degrees.

Prism and Base

If the eye muscles are not working in a team, then prism and base will help in correcting them. The prism value is the number that can move to 0.5 increments.

How are near and distance prescriptions different?

  • Minus powder lens is needed for the short-sighted and the glass has thicker edges and thinner middle.
  • For the long-sighted, there is a need to get the plus power lens and the lens in the glass might look thicker in the middle and with thicker edges.

By consulting the optometrist will be able to tell you about the prescription you need to get. They will help you select the correct frame for the prescription and talk you through about the additional extras.

What should I do if my vision is changing?

If the prescription has changed with time then most likely we need to change the lens strength. The rate at which the prescription changes will depend on your age. Children often get the issue of short-sightedness and presbyopia will develop around the age of 45. By getting the proper eye examination will help you to check the eye’s health. The best eye specialist will give you the right kind of technology and look for the possible signs which might be creating issues with your vision.

How do I get ‘20/20 vision’?

The short answer is you should wear glasses and contact lenses which helps you to have 20/20 vision. For more information, book your appointment today only.