Necessary measurements for dispensing and fitting new glasses

Digital dispensing enables individual viewing experiences

Knowing the patient’s prescription isn’t the end of the story. Firstly, it is impossible to measure without the chosen frame on the patient’s face. Fulfilling the prescription is very much a symbiosis of frame and lenses. It is worthwhile mentioning that not all frames are suitable for all prescriptions, so it is really important that the customer is guided in his/her frame choice by a dispensing optician.

Then, what exactly does the visuReal® digital centration system measure, and how can it help an Eye Care Professional (ECP) for producing customized spectacles? Here are the answers:

 

Every face is unique

Interpupillary Distance (PD)  Traditionally this has been the distance between the center of your pupils when looking straight ahead. Today opticians understand that this just isn’t enough for the production of modern spectacles. Each lens must be individually position using your chosen spectacle frame. This measurement takes into account that not all noses (or faces) are equal. In fact, most are not! This measurement takes into account that the frame may be sitting slightly more to the left (or right) of the center.

Eye Point - the height is essential

Fitting  Height (eyepoint)  It is important that the lenses are centered vertically so they are exactly the correct height in the frame, this is dependent on the design of the lens. Our faces are very asymmetrical and so having the frame in the correct position on the face is vital for this measurement. This applies to modern Single Vision lenses as well as the Progressive ones.

 

Head and frame inclination needs to be considered together

Wearing Pantoscopic Angle (WPA) This is the angle resulting from the deviation of the 90° line in front of the wearer’s face and the tilted frame line watching into far distance while wearing the frame. Some glasses have flat frames, but most will tilt slightly, so the top portion of your glasses is slightly further from your face than the bottom. In fact, for progressive lenses, a slight tilt can assist your vision by contributing to the right kind of magnification effect. Otherwise, if you look through incorrectly angled spectacles, aberrations and distortions are introduced.

Curved or flat?

Face Form Angle Which is the measurement of the frame curvature or how much the frame curves to the shape of the face. Depending on how high or low the base curve is, it will indicate how curved or flat the frame and lenses will be. visuReal even measures the FFFA (frame face form angle) – i.e. the wearing FFA .

 

The "gap" is what matters between eye and lens back surface

Back Vertex Distance (BVD) This is the gap between the front of your eye and the back surface of the lens. The distance the lens is away from the eye alters the effective power of the lenses thus it is important to compensate for this in the final lens power. Naturally, opticians need the frame on the face to measure this and we also need to know the original prescribing BVD that the optometrist used. If you are a little older and wear progressive or multifocal lenses we also need to know where the optometrist placed the reading addition when you were being tested, before, or behind, the distance lens. visuReal is even more specific in this case. It measures the so called FCD (Frame Cornea Distance), which means the distance between the frame centre and the cornea, since you cannot know exactly the lens’ back surface value in advance.

The imaginary box

The Boxing Size of the Lens The boxing system is based upon the idea of drawing an imaginary box around a lens shape with the box’s sides tangent to the outermost edges of the shape. The system uses the sides of the boxes as reference points for the standard system of measurements which includes: A-size, B-Size or frame centerline and distance between lenses (DbL).

 

Precise, individual data acquisition - they key to better compatibility

Precise data provided by the device are being considered from the very beginning of the production and affect the optical design throughout the whole production process, thus providing the best available visual experience for the wearer. Products based on individual parameters guarantee personalized results in all cases.
The visuReal digital video centration system helps to prevent non-adaptation problems in the case of progressive lenses. Furthermore, it eases the fitting process of customized optical lenses, thus creating a comfortable environment for your customer when acquiring a new pair of glasses.
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Benefits of Digital Dispensing

Dispensing process becoming more precise, personal and more enjoyable

Buying a pair of eyeglasses can be a complex, puzzling, and even frustrating experience for many consumers. The process is often fraught with uncertainty, with consumers asking dispensers questions such as “Do these glasses look good on me?” “Can you get them to fit me more comfortably?” “Will these new lenses really help me see better?” and “Am I getting my money’s worth?”

Fortunately, a new generation of eyewear dispensing technology is helping eyecare professionals allay their customers’ concerns by making the dispensing process more precise, personal, and ultimately, more enjoyable.

Digital dispensing gives a totally individual viewing experience

The new technologies—like those offered by our company—range from cutting-edge dispensing systems that take digital photographs and measurements to simple hand tools. What they have in common is the ability to precisely capture patient measurements, including how the frame fits the patient and the position in which it is worn.
Combining this biometric data with the patient’s prescription and a digital lens design enables the optical laboratory to produce one-of-a-kind lenses that optimizes the performance of the lens and gives the wearer a totally personalized viewing experience.Another plus of using the visuReal system in your optical dispensary is that it impresses customers, especially when they see other patients being measured. It is common that patients who see an ECP using the equipment say “Why don’t you use that machine on me?”

Wow experience for the customer

Along with the “wow” reaction these lenses typically elicit from wearers, patients are often favorably impressed with the high tech look and feel of the dispensing system itself and well as with useful features such as taking digital photos of consumers trying on their new eyewear and then emailing them the photos or demonstrating premium lens options.
Interviews with several ECPs reveal that using new technologies, like the visuReal Master, are boosting sales of premium lenses, reducing reworks, and creating a unique patient experience that can’t be duplicated by an online, virtual dispensary.
Below are some of the benefits that come implicitly in a visuReal digital centration system:

Precision and accuracy are enhanced. Any of the visuReal equipment can deliver a precision of a tenth of a millimeter, which is more precise by a factor of five than a common digital-readout pupillometer.
Improved repeatability. In many busy offices, there are multiple employees of varying skill levels. The measurements taken from a digital centration system reduce the variations between operators as well as between successive measurements by a single operator.
Easy obtention of “position-of-wear” measurements. The advent of wrap-around eyewear, as well as position of wear enhanced single vision and progressive lenses, require that ECPs obtain good values not only for PD (pupil distance) and pupil height but also for vertex distance, pantoscopic tilt, and panoramic (aka face-form) angle. The visuReal digital centration systems can easily obtain these values via digital pictures.
Advanced interfacing with practice management systems. If the ECP employs an advanced PMS, linking it to the visuReal equipment will allow to efficiently transfer the patient’s eyeglasses measurements data at the push of a button. Making both the dispensary and lab better partners in the visual performance delivered to the patient.

ECPs often view the price of equipment upgrades as hard costs that drop to their bottom line rather than helping to keep their business at the top of its game. Particularly with the latest technology, both hardware and software evolve at breakneck speed, and there can be a tendency to wait for that next big upgrade. So, it is no longer an option to sit back and just look forward to the day your lease payment ends. Today, more than ever, keeping the latest tech in your practice is the only way to ensure you are ready, willing, and able to compete in the most intense and cutthroat optical market.

It’s time to decide. It’s time to go digital and visuSolution is here to help you.

For more information or to address specific inquiries regarding our visuReal digital centration systems, please feel free to contact us.

„From now we have first customers using the VisuReal Master and they absolutely love it! They confirm it is faster, images are perfect and it’s simple. From my side I really appreciate that you still improve it. Boxing system is perfect and I am looking forward when we will know statistics of using.“
Lucie
New Media Trainer, Hoya Lens CZ
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Digital Eyewear Dispensing Becoming Basic

Essentially, a digital video centration system performs the basic measurements, such as pupillary distance, segment height for progressive lenses, vertex distance, panoramic angle, and pantoscopic tilt. A digital photo function is also included for capturing how the consumer looks wearing the spectacles.

While the refraction position is the matching of the prescription with the consumers’ visual needs, the visuReal system provides a set of measurements that allow the laboratory to make alterations to the lens design to match the consumer’s prescription needs for maximizing visual quality.

The main benefits of a visuReal system are that precision and accuracy are enhanced, as it takes more precise readings as compared to the traditional method, minimizing human error.

Practitioners who think they can rely on existing skill sets will see themselves losing competitive advantage over the years when consumers stop coming back as they are not keeping up with the current technology.