Check out our FAQs for quick answers to pressing questions. More detailed instructions and information can be found in the manual.

Intended use of Qvido

What are the purpose and benefits of Qvido?

An optician determines specific data such as the pupillary distance and Fitting height so that spectacles can correct a patient’s vision in an optimal manner. This data is used to individually grind the lenses so that they can be correctly positioned in the frame. Qvido provides very precise digital support for this process.

Who should use Qvido?

Qvido is intended for professional opticians, trained in the adjustment of spectacle lenses. An instruction manual and in-app help are available to provide the optician with information on the correct use of Qvido.

What are Qvido’s components?

Qvido consists of a tablet app and a fitting frame that is attached to the patient’s lenses. The fitting frame contains a range of markers that enables the calculation of various parameters necessary for lens fitting.
The Qvido app is delivered digitally via download. The Qvido fitting frame is a physical component that is delivered by post.

Are there any restrictions in usage?

Qvido can be used for any optometric adjustment of lenses by an optician. However for half-eyeglasses, small lenses for children, safety lenses, and bifocal lenses, only the PD should be determined with Qvido. The fitting height should be measured manually.

Measurements and lens types

What measurements can I take with Qvido?

Qvido can be applied to every kind of optometric measurement.

  • Monocular pupillary distance (PD) - left/right
  • Fitting Height
  • Vertex distance
  • Pantoscopic angle
  • Frame wrap angle
  • Lens height and lens width
  • Lens diameter

How accurate is Qvido?

Exceptionally accurate. All optometric lens fitting values can determined by Qvido with the specified possible precision of 0.1 mm or degrees. Monocular PD results have an error of less than 0.5 mm compared to manual measurements. And we’re continuously testing our fitting frames and algorithms to maximize accuracy.

Can bifocal lenses be fitted using Qvido?

The PD can be determined for bifocal lenses. However, marking the bottom edge of the pupil must be done manually.

Can I use Qvido for special lenses?

Qvido can be used for sport lenses, lenses for small children, reading lenses, and protective work lenses.

High frame wrap angles (about 20°) are technically possible. However, for lenses with a high curve, fitting for the diameter and lens width is limited. This is where a plausibility check is essential.

For half-lens lenses and small lenses for children, the PD and Fitting Height should be taken manually.

How is the vertex distance determined?

We use the profile image to determine the vertex distance. It is the distance from the surface of the cornea to the back surface of the lens.

Does Qvido calculate the near or far PD?

Our algorithms know and take into account the convergence of the eyes due to the close distance of the tablet to the patient. Qvido therefore deliberately measures the near PD and converts it into the required far PD using validated and tested algorithms.

This is why it is so important for the customer to look directly into the camera during the measurement and for the camera to be at the customer's eye level.

How does Qvido calculate Fitting height?

Qvido calculates Fitting Height in two forms that you can manually choose during the measurement process: principal visual direction and zero visual direction.

Important tips for high accuracy

How do I attach the frame to the spectacles?

The spectacles must be properly fitted to the customer before attaching the fitting frame. The frame needs to be aligned with the center of the bridge. Clipping and locking of the fitting frame should be performed carefully. The legs of the fitting frame should not be bent outwards or inwards. If the locking slider is tightened too much, the legs will then bend outwards.
A very detailed description of the attachment process is available in the Qvido Manual in our Help/Support section.

What is important for taking the frontal picture?

The customer must look directly into the camera and the camera needs to be lined up with the customer's eyes (vertically and horizontally). This means that the tablet must be held slightly off-center because the camera is located in the upper right corner.

For a valid measurement, a distance of 30 - 50 cm from the customer must be maintained. It is important that the customer assumes their natural posture. For a better understanding see the illustrations in the manuals.

In order to take precise measurements, it is important that the image is clear and that the eye area is easily recognizable. Particularly the pupils and the edges of the spectacle frames should clearly stand out.

What is important for taking the profile picture?

The customer must hold their position after the frontal photo was taken.

The customer should now look straight forward into the distance.

Roughly align the customer’s head with the outline on the tablet screen. It is sufficient if the outline of the customer’s face approximately matches up with the template.

However, the template’s outlined temple should be exactly aligned with the temple of the customer’s spectacles.

Make sure that the customer is still assuming their natural posture.

The photos are too dark or blurry – what can I do?

It is difficult for the tablet’s camera to automatically regulate the brightness under certain lighting conditions. This can result in photos of the customer, which have severe shading in the eye area. The visibility of the pupil, the spectacle frames and the measurement frame can be increased by using the contrast buttons.

What is important for determining the pupil?

The green cross needs to be placed at the center of the pupil. It is the cross that is relevant to ensure an accurate measurement, not the thin green ring. The ring might only help when it is hard to distinguish the pupil and the iris.

What is important for determining the rims?

For an accurate measurement the green lines need to be placed at the inner edges of the spectacle frames as precisely as possible.

Handling tablet and customer

What if I am significantly taller or shorter than the customer?

To obtain accurate measurements it's important that you are at the same level as the customer's eyes. So please fetch aids (e.g. stool, stairs) or bend your knees. The customer should never change their natural position.

How should I hold the tablet if the customer naturally tilts their head?

The tablet should always be held in a level position directly in line with the eyes. To ensure the best results, hold the tablet in a level and vertical position and make adjustments until the positioning indicator turns green.

Will a slight turn of the customer’s head invalidate the values that are produced?

No, if the customer’s head positioning is slightly off-center, this will be taken into account by the app and compensated. However, it is best to have the correct positioning between the customer and the tablet.

Note that when taking a profile photo, the side legs of the fitting frame should line up perfectly with each other so that the farthest leg isn’t visible. This will produce optimal results.

In the profile image, should the head of the customer exactly lined up with the on-screen outline?

It suffices if the outline of the customer’s head approximately matches up with the on-screen outline. Slight blurring is also not a problem. Align the template’s drawn temple with the temple of the customer’s spectacles.
The shutter button can only be activated if the artificial horizon element of the app interface is stable and green.

Can I take photos of the customer while sitting?

We recommend taking photos of the customer while standing so that you can observe the customer’s natural posture.

Conditions of use

Do I need a strong internet connection?

No, you don't. You’ll only need an internet connection for signing in and validating your subscription once a month.
Taking measurements can be done offline. This increases your mobility and ensures that you can offer a smooth, professional experience wherever you are.

Are there any special lighting conditions for the usage?

Qvido can be used in an optician’s normal business environment. However, it is important to ensure that the environment is sufficiently lit because the app does not use flash.
Brightness can also be increased manually in the app by pressing the contrast button before taking a photo.

How should I store the fitting frame?

The Qvido fitting frame is a delicate measuring instrument. If it is bent or damaged, results may be rendered inaccurate. The frame should always be stored in the supplied protective case.

How can I order spare parts for the Qvido fitting frame?

The upper rubber sleeves of the grip and the lower rubber sleeves of the lock slides are available for ordering as spare parts. To place an order, please contact us via mail.

What about safety instructions?

Our online manuals provide important safety instructions. Users must read them carefully before using the product.

Technology and integration

Do I have to use my own device/tablet?

Yes. The Qvido app is supported by your 6th to 10th generation iPad. So, if you’re already using one of these devices in-store, perfect!

What device and operating system do I need to run Qvido?

To run the Qvido app you’ll need an iPad 6th to 10th generation and the latest stable major release of iOS and later. Currently, that’s iOS 16. Support for new versions of iOS will be available within 90 days of the official release.

Can Qvido run standalone?

Yes, Qvido runs locally and independently from any other systems on the mobile device. At the same time, the lens fitting parameters can be transferred automatically to ERP systems via a generic interface.

You can find technical documentation on how to connect an interface and other manuals here. The connection should be performed by an IT expert who knows how to adapt interfaces.

Can measurement results from Qvido be transferred to other systems?

Yes, the determined centration parameters can be transferred automatically via a generic interface. You can find technical documentation on how to connect an interface and other manuals here. The connection should be performed by an IT expert who knows how to adapt interfaces.

Pricing and testing

Can I try out Qvido in my store?

Yes, currently we are offering a trial period with one free fitting frame included. Just contact us - we will activate you.

How much does Qvido cost?

Qvido is offered as a yearly subscription model: each installation on a device costs 79.95 €* per month. After the 3-month trial period, the contract runs for 1 year. The Qvido fitting frame costs 59.95 €* one-time.

*plus VAT