2/13/2024 0 Comments Pupil distance app![]() Accurate pupil distance settings help to obtain clear images and reduce eye fatigue.ģ: Long-term use of the headset may lead to slight glare or eye fatigue, it is recommended to take appropriate rest to relieve discomfort. Tipsġ: Please do not forcibly break the lens barrel, so as not to cause damage!Ģ: Please note that setting the use of an inappropriate pupil distance may cause visual ghosting or eye fatigue. The auto-adjustment software recognizes your pupil distance and automatically adjusts after you put on the Pimax Crystal. – Enter the pupil distance number and click “Set” to adjust the pupil distance to the appropriate position.– Click the device settings, and then find pupil distance adjustment.Users can use the buttons in the upper left corner of the Pimax Crystal for manual adjustment. Don’t take for granted that their PD measurement from a previous year will still be correct. Since a person’s pupillary distance changes with physical development, it’s important to consider that children may have different pupillary distances each year. If the IPD setting you adjusted when you actually used the headset works better for you, please use it. The average pupillary distance for children is between 41 and 55mm. You may still have problems with clarity or eye strain. Listen to your EyesĮven if you get an accurate IPD measurement and set your headset accordingly, it may still not be the best setting for you personally. You can also ask a friend to do the measurement. Note the measurement under the other eye. Place the 0 mm mark under one eye, aligned with the center of the pupil. To do this, stand in front of the mirror and look straight into your eyes. If you have a mirror and a ruler measured in millimeters, you can get a fairly accurate measurement of your IPD at home. This is the most accurate way to get your IPD number. If you order single vision lenses for reading, and upload a copy of your script, we will make the calculation/conversion for you.įor single vision for distance lenses, you can ignore your ADD values and just use the rest of the Rx normally.You can go for an eye exam to get your IPD by a standard eye test, or your optometrist probably has your IPD on record. If you have an Rx with an “ADD”, but want to order single vision lenses for reading, then you will have to convert your Rx by simply adding the ADD values to your SPH, and that’ll be your new SPH.Įx: If you have a SPH of +4.00 and an ADD of +2.00, then your new SPH value will be +6.00Įx: If you have a SPH of -2.50 and an ADD of +1.00, then your new SPH value for that eye will be -1.50. ![]() If you order progressive/bifocal lenses, your prescription must have an ADD value.If it says “SPH” or “SPHERE” for you CYLINDER, that means that there is only a correction for your sphere, not that they have the same value.CYLINDER values must be either both positive or both negative values.If there is an AXIS, there must be a CYLINDER.Line up the zero (0) on the ruler with the center of your right pupil. Rest the ruler against your forehead for stability. Stand 8-10 inches away from a mirror, looking straight ahead with the ruler parallel above your eyes. If there is a CYLINDER, there must be an AXIS. Find a ruler that measures in millimeters (mm) or download our ruler here.Now that you know what it all means, here is how to make sure your prescription is valid. Prism Correction: This correction is for those who either have exotropia or esotropia. Your doctor may write your ADD in the near vision (N.V.) or ADD section. PD: Stands for “pupillary distance”, the distance between your pupils.ĪDD: The additional value or ADD is commonly used for bifocal or progressive lenses, as well as for reading glasses. Axis is only present if you have a Cylinder correction on your Rx. If the number has a plus sign (+), you have a farsighted astigmatism.Ĭylinder power is always after sphere power in an eyeglass prescription.Īxis: The axis defines the location of the cylinder powers on the lens with a number ranging from 1 to 180.If the number has a minus sign (–), you have a nearsighted.If nothing appears in this column, either you have no astigmatism, or your astigmatism is so slight that it is not necessary to correct it. The first number is always the right eye (OD) measurement, and the second number is the left eye (OS). Dual PD is usually written in the following notation: 32/30. If the number has a plus (+), you are farsighted.Ĭylinder (CYL): This indicates the lens power for astigmatism. DUAL PD, or monocular PD, consists of two numbers and is the distance between the centers of each pupil to the bridge of the nose.If the number has a minus sign (–), you are nearsighted.Sphere (SPH): This indicates the lens power, prescribed to correct nearsightedness or farsightedness. OS: Stands for “oculus sinister”, Latin for your left eye. OD: Stands for “oculus dextrus”, Latin for your right eye.
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