PUPIL DISTANCE MEASUREMENT TOOL PORTABLE

Believe it or not, your pupillary distance can change multiple times throughout the course of the day. Take these measurements at various times during the day.

TIP: Measure 3-4 times and record your findings.

The mm line that lines up to the center of your right pupil is your PD.

Close your left eye and open your right eye.

Align the ruler’s 0 mm with the center of your left pupil.

But, if this somehow is forgotten or you aren’t sure its an accurate measurement, we can suggest three options to help you measure PD on your own. Usually, your doctor will give you your PD measurement. If you are beginning with dual PD, you will subtract 1.5 mm from the measurement for each side. You simply subtract 3 mm from your distance PD. You can easily calculate this from either your single PD or your dual PD. Near glasses PD is important to calculate if you are looking to order reading glasses. The first number always refers to the right eye and the second describes the left eye. Your dual glasses PD is also called your monocular PD and consists of two numbers. For those, you need to measure your Dual PD. This can be used for prescription glasses, but not reading glasses.

Your single glasses PD is one number that describes the distance between the center of one pupil to the center of the other. In children, PD typically ranges from 43-58 mm. For the majority of adults, PD is roughly 54-74 mm. Your pupillary distance determines where your “optical center” lies. This tells us where your gaze falls in your lens. In order to best fit you with your new glasses, it’s important for us to know your PD.

PUPIL DISTANCE MEASUREMENT TOOL PORTABLE

Sophisticated algorithms developed by RSIP Vision for pupil distance measurement are well-suited for integration into machinery used in eye clinics and can also be embedded as an application in portable devices, such as phones.Pupillary Distance (or PD, for short) is the distance between the centers of your pupils. Micro-optics embedded within phones keep improving, and algorithms for pupil distance measurement can be embedded as applications in them. However, these expensive technologies are not yet accessible equally, while vision impairment is frequent throughout the world.While the portability of heavy equipment is limited, and sophisticated technologies are still in the reach of few, a remedy might be the use of portable devices, such as cellphones and tablets. Within these systems, patient motion compensation is already embedded, and errors of less than 0.25 millimeters have been achieved. As algorithms have advanced some manufacturers have employed expensive 3D technologies for precise pupil distance measurement. However, these systems have several disadvantages, primarily caused by their high cost and lack of portability, due to their large size. These measurements are performed on images of the patient’s face, taken while they stand still. To fit modern precision requirements, lens manufactures have developed systems to measure pupil distance with an error tolerance in the range of one millimeter or less. Such requirements are especially strict in modern glasses, which can accommodate several types of vision corrections: far, intermediate, and near on the same pair. However, these methods were highly error prone and did not fit modern requirements for precision. Classical pupil distance measurement methods included the use of a ruler and a pupilmeter.

Pupil distance measurement tool