IS IT ENCRYPTED?
The first numbers are always for the right eye, the left eye comes after.
The very first number (sphere) is preceded by a + sign, if you have difficulties to see close, or by a - sign, if you have difficulties to see far.
Your prescription might stop here.
If it doesn’t, it means that you’re astigmatic. Another series of numbers (cylinder) will be preceded either by a + or - sign and followed by the value of a lens axis.
Your prescription might go on. It means you’ve reached a respectable age. Like it or not, it happens to everyone, you’re having more and more difficulty reading or with close work tasks. The value of your correction is then called ″addition″.
PD or pupillary distance is the distance between your pupils, to ensure your lenses are accurately positioned.
NO DRAMA, JUST SOME GOOD COMMON SENSE.
In an ideal world, eye exams should be systematic, yearly, from the earliest age.
Some might think that visual acuity is a black and white issue: I can or I can’t read the blackboard at far or my smartphone at near.
Actually, some vision problems can stay hidden and only a professional will detect it through an eye exam.
Not to worry, it is a standardized, painless test that evaluates your eyes ability to see letters and forms at a certain distance. Now that you know this, book an appointment for an eye test with an eye care professional!
Shortsightedness: (medical term: myopia) this is a vision condition where distant objects appear blurry whereas close range vision is good.
Farsightedness: (medical term: hyperopia) this is a vision condition where close objects appear blurry whereas distant vision is good.
Astigmatism: in short, it is a specific difficulty to see straight lines. You can be both astigmatic and shortsighted or farsighted.
Near vision issues: (medical term: presbyopia) it’s a natural evolution of our eye muscle. It affects everybody without any exception, around their forties.
Eye fatigue: this feeling can be the symptom of many different visual problems. It has to be taken seriously and drive to a proper eye exam.
It may mean that you need to change prescription power or a different type of lenses (e.g. with glare protection, or with special features to help vision on digital screens, etc.)