FINDING YOUR PUPIL DISTANCE

First, let’s talk about your optical centres also known as Pupil Distance this is where your pupils are located, directly behind each of the lenses knowing where your pupils are behind your lenses means they can be aligned to give you the truest and most accurate vision. These positions are measured vertically and horizontally, similar to longitude and latitude.

Your Pupil Distance is the most crucial detail for ordering any kind of lenses online, especially varifocals. This is because progressive lenses are more intricate, containing multifocal lens powers.

Because of this intricacy, varifocal lenses are more sensitive to their positioning. Your unique facial structure and how your frame fits you needs to be taken into account to make your lenses as accurate as possible. In other words, when glasses rest on your nose and ears, their positioning is unique to you.

Different glasses have different sizes of lenses, frame shape and temple thicknesses which all affect how they fit you and the position of your measurements in the lenses.

To asses where your pupil distance is, you need two measurements.

• Pupil height (HT)
• Pupillary distance (PD)

MEASURE YOUR PUPIL HEIGHTS

Your pupil heights (hts) determines the vertical height between your pupil and lowermost part of your lens. In order to find your Pupil height, the best method is to have the glasses on your face. And use this advice.

With help

1. Stand/sit in front of someone
2. Wear the glasses you’re ordering lenses for
3. Someone vertically holds a plastic ruler against one of your lenses
4. They align the 0 mm mark with your pupil centre
5. They assess the distance to the bottom of the frame
6. They note each height according to your left and right eye

On your own

1. Stand/sit in front of a mirror
2. Wear the glasses you’re ordering lenses for
3. Vertically hold a plastic ruler against one of your lenses
4. Align the 0 mm mark with your pupil centre
5. Assess the distance to the bottom of your lenses
6. Note each height for each of your left and right eye

PD height tips

• Only measure the lens, not the frame
• Use a plastic ruler to prevent scratches
• If it helps, close one of your eyes to help you see the ruler
• Brace the ruler on the side of your nose and the frame/lens
• Your measurements are for your perspective of left and right, not your assistants

We use this method here at Reglaze My Spex to make your lenses as accurate as possible. For the extra time, this method will prevent any vertical misalignment of your pupils.

Always remember. If the glasses you are sending us have YOUR lenses in already we can take all measurements from your existing lenses abs apply it to your new prescription lenses.