Next time you get an eye checkup, you can be more confident knowing that you understand how your prescription works! See and understand how much your eye sight has improved or by how much did your prescription get stronger. You might see hand written here words like “multicoated” or “anti-radiation” or “blue light”. 59 - your near PD: Far PD for both eyes which is used for progressive/bifocal glasses. 63 - just add 33+30 together: 59/63: Near/Far PD: Near PD for both eyes which is used for reading glasses.
![which is right and left od or os which is right and left od or os](https://d2fxn89uubslc7.cloudfront.net/1/static/public/statics/images/how-do-i-read/2-m.jpg)
You will find these specifications under this area. PD (OS)/PD (OD) Monocular PD for your left eye (OS) and right eye (OD) which is used for single vision glasses. If your prescription has Axis, you might see values indicated as SPH x CYL x Axis.Īside from being fitted to the correct prescription, you might want to add a coating to your lenses as well. The angle by which they point is what is indicated by the Axis. Imagine your eye as a football their pointy ends could be pointing up and down, or side to side. Sometimes, it might also include AXIS.Īxis indicates the orientation of the astigmatism.
![which is right and left od or os which is right and left od or os](https://www.seevividly.com/images/m_Prism2.png)
If you have astigmatism, your prescription might have 2 values, on for SPH correct and another for CYL. Instead of being spherical, the eye is shaped more like a football. If Sphere indicates the lens power for myopia or near-/farsightedness, CYL or cylinder indicates the lens power for astigmatism. Elements of a Glasses Prescription OD & OS: Right eye and left eye, respectively Sphere & Cylinder: Usually shortened to SPH and CYL Axis &. You will commonly hear these terms mentions during your eye checkup. SPH or just S means Sphere this means that although there is a nearsighted or farsighted correction needed, the lens power is spherical or equal in shape to the eye unlike with astigmatism. 25 diopters or farsightedness at 3.75 diopters the greater the value, the stronger the prescription. 25 you if your prescription has the value of -0.25 or +3.75. The values are diopters in increments of. Near sightedness is indicated with a – sign while farsightedness is indicated with a + sign. This value indicated near- or farsightedness. Next to or below OS & OD, you will find a value with a + or – sign before it.
![which is right and left od or os which is right and left od or os](https://cdn.shopifycdn.net/s/files/1/0078/7746/0023/files/333_v_600x600.jpg)
Sometimes, it’s easier to understand because they will just use R/L. Simply, OD and OS are the readin for your right and left eyes respectively. OD means oculus dexter and OS means oculus sinister they are Latin terms that mean “vision in the dexter eye” and “vision in the sinister eye”. So what do the digits in that small sheet mean? After all of these, you will be handed your printed grade reading that you can’t seem to make a lot of sense of. If you’d had your eye checkup recently, do you remember it turning out this way: you are asked to peer through a machine and focus on a photo of a balloon or a house in a field afterwards, you will be taken to a room and asked to wear frames with removable lenses while being instructed to read out the letters of Snellen scale through a mirror.