Hur mäter man pupillhöjd hemma? Enkel guide steg för steg

How to measure pupillary height at home? Simple step-by-step guide

What is pupillary height?

Pupillary height (also called fitting height or segment height) is a measurement used when making progressive lenses. It shows how high your pupil is positioned in relation to the bottom edge of the lens in the specific frame you are using.

This measurement is crucial for the lenses to be correct. Without correct pupillary height, it is not possible to center the progressive zones – distance, intermediate, and near zones – in the right place. Otherwise, the lenses may feel off or uncomfortable from the start.

Pupillary height is measured for each eye individually and differs from pupillary distance (PD), which shows how far apart the eyes are horizontally. To manufacture progressive lenses that work optimally, both pupillary distance and pupillary height are required.

Method 1: Mark the pupil directly on the lens (recommended)

You will need: a permanent marker. Optionally, some rubbing alcohol.

  1. Put on your glasses and make sure they sit comfortably on your nose. Stand straight and look straight ahead.
  2. Ask someone else to stand in front of you and mark a dot on the lens where the center of your pupil is visible.
  3. If the dot is in the wrong place – gently remove it with a little rubbing alcohol and repeat.

This is the same method opticians often use. When we receive your frames, we can measure the pupillary height directly from the markings.

Method 2: Measure pupillary height in a mirror with a ruler

You will need: a mirror and a ruler.

  1. Stand about 20 cm from the mirror with your frames on. Look straight ahead.
  2. Hold the ruler vertically against the front of the lens and place zero at the bottom edge of the frame opening (the lowest point of the frame opening).
  3. Read the millimeter line that is level with the center of your pupil. Repeat and note the value for each eye.

How to provide pupillary height to Swopti

  • Do you have the measurement on your prescription? Enter it when you upload your prescription or enter your prescription values.
  • Have you marked the lenses? Then you don't need to enter the pupillary height – we will measure it ourselves from the marking.
  • Have you measured with a ruler? Enter the value in mm per eye (e.g., Right = 17 mm, Left = 18 mm) in the message field before adding to the cart.
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Frequently asked questions

Is pupillary height the same as PD?

No. PD (pupillary distance) is the horizontal distance between your pupils. Pupillary height is the vertical placement of your pupil relative to the bottom edge of the lens in the chosen frame.

Why can right and left be different?

It is normal to get different values per eye as the frame sits slightly differently and the face is not completely symmetrical. Always specify monocular pupil height (separate mm values).

Do I need pupillary height for all types of glasses?

No. Pupillary height is a must for progressive lenses. For single vision lenses, it's not always necessary, but it can provide better precision.

Can I measure my pupillary height myself without help?

Yes, you can measure in a mirror with a ruler. But the result is often more accurate if someone else helps or if you mark the lenses.

Can I use an app to measure pupillary distance?

There are apps that claim to measure pupillary distance, but the result may vary. We recommend the dot method or measuring with a ruler in a mirror.

Can the optician give me my pupillary height?

Yes, if you have an eye exam, the optician can often provide you with the pupillary height along with your prescription. Remember that the pupillary height is always specific to the frames you are using – therefore, the measurement needs to be taken in the frames for which we will be grinding lenses.