Learn_How_to_Read_Your_Glasses_Prescription by idooptical


									Learn How to Read Your Glasses Prescription
It is definitely not possible to read a doctor's prescription for the simple fact that it is not always
legible. But in certain cases even when it is legible one can never understand what each
medical abbreviation means. The notations and terms seem like a foreign language that we are
not familiar with. Mostly we accept what the doctor tells us and follow the suggestions rather
than trying to decipher the prescription.

It is the same with our eye glass prescriptions. If the doctor says you need to wear glasses, you
get his opinion and prescription and take it to the opticians who provide you with the required
prescription glasses. However there are many people who are eager to read and know what
actually their vision status is and what power of glasses should be bought, before handing the
piece of paper on to the optician.

For these a simple line up of what the prescription would look like. To site an example OS
means +1.00 DS; OD is -2.00 - 0.50 x 180; ADD refers to +1.75 OU. Surely a layperson cannot
understand what these terms mean. It is understood that Latin abbreviations are used by
doctors when writing eye glass prescriptions.

Speaking in Latin terms OD means 'oculus dexter' which refers to the right eye. Oculus sinister
or OS means the left eye. If you find OU then your doctor is referring to both your eyes. Now
this understood how to decipher the numbers that precede these abbreviations? Simple, here
are a few important tips.

Prescription glasses have many numbers by which doctors explain the status of your vision. For
instance the starting number for OD is -2.00 referring to farsightedness or nearsightedness; the
(-) sign means the powered lens should be negative for nearsightedness. The (+) sign means
farsightedness. If the prescription reads as -0.50 it refers to the power between the two eyes
that is separated by 90 degrees. The x180 refers to the axis 180 showing the location of the
positive meridian of the eye.

Let's take up the rest of the numbers like +1.00 DS. The DS here refers to diopters sphere
which means the correction in the left eye is spherical in nature and has no astigmatism. The
ADD number +1.75 indicates that a patient requires prescription glasses for close range
viewing. This is a situation that is most common at the age of 40 and above.

It should be noted that +1.75 power should not be considered as reading glasses; instead one
should do a bit of calculation which would arrive at -0.25 in this way -2.00 +1.75 = 0.25. In this
way you would arrive at the result of the right eye being -0.25 -0l50 x 180 and the left eye will
have +1.75 +1.00 = +2.75 D.S.

However, just by reading and understanding what these numbers and abbreviations mean does
not allow you to use your own decisions in choosing the right prescription eyeglasses. It is
always best to follow the doctor's suggestions and buy your glasses from reputed
manufacturers or stores either online or may be at your nearest optician that you are familiar


                                   With many leading brands in prescription eye glasses it is always very hard to choose the right
                                   one. Whatever may be the design and price the most important factor to consider when buying
                                   prescription glasses is the exact power that is prescribed for your type of eye defect. If the
                                   power is not perfect then there could be man y side effects like head ache etc. Also beware of
                                   fake sellers who have glasses that look attractive but are not meant for wearing without the
                                   doctor's prescription.

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