On
a typical prescription, you will see two sets of rows. Most of the time
top portion is for your OD or right eye while the bottom portion is for
your OS or left eye.
For
Distance correction, there should always be a value under Sphere and
most of the time it is negative. Its abbreviation is 'D.V.' which
stands for Distance Vision.
For
Reading-only correction, there should always be a value under sphere
and most of the time it is positive. If there is a value under Near
Vision (N.V., N.V.O.) then enter the power in the BOTTOM half of the
form and leave the ADD power blank or ("0.00").
For
astigmatism correction, please note that that Cylinder (CYL) and Axis
are always provided together. For any value of Cylinder there should
always be a value for Axis. Some doctors use positive (+) cylinder and
some uses negative (-), there is a big difference between the two so
please pay close attention to the positive and negative signs. If you
don't have astigmatism correction, doctors might just leave it blank or
simply SPH or DS which means Sphere or Diopter Sphere. Axis should be
from 1-180 degrees, if you see a value like '5' under axis, this is
also the same as '005' or '5 degrees'. It should always be a whole
number and there should be no decimal point on the axis.
For
Bifocals and Progressive lenses, please check with your eye doctor
whether the Addition is for Bifocals or Progressive. Most of the time,
compared to the Bifocal Addition, the Addition of the Progressive is
higher by 0.25, so please verify. An indication to know if your
prescription is for Progressive is a PAL note written on the
prescription; only one ADD means the addition for the Left and Right
eyes are the same. Please be advised that we process a minimum of +1.00
and maximum of +3.00 for Addition powers.
Eye
Doctors will sometimes leave out the decimal point on the Sphere,
Cylinder and Addition. For example, -25 or +175, this is understood
-0.25 and +1.75.
Very
importantly, pay close attention to plus and minus sign as this will
greatly affect the lens. If there is anything on the prescription you
are not familiar, please call our Customer Service and we will be happy
to assist you. |