i.Scription (iScription) Lenses

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What are these measurement machines used for?

iTerminal is the auto measuring tool used to measure the position of wear data for every patient.  i.e. seg ht. /  P.D.  / Panto / Wrap / back vertex distance.  It also acts like a smart mirror to present the options and benefits of AR, Transitions, tints.

The iProfiler is an auto refractor / keratometer / corneal topographer / and wave front abborometer.  The measurements from the iProfiler are combined with the Doctors subjective refraction and the result of this merger is the iScription.

The i.Scription SW provides tools for the ECP to review the information from the i.Profiler plus and image simulations based customer data for easy patient communication.


i.Scription® by ZEISS: How does it work?


i.Scription and How the System Works

Wavefront aberrometry data generated from the i.Profiler plus® is combined with the binocular aspects of vision from the Subjective Refraction to calculate an ultra precise prescription (i.Scription®) using a proprietary software algorithm.

The i.Scription SW provides tools for the ECP to review the information from the i.Profiler plus and image simulations based customer data for easy patient communication.


Unlock the full potential of customized lenses using i.Scription®.

The most precise prescription deserves the most precise manufacturing technology. We only allow lenses manufactured to ZEISS’ highest quality standard to be ordered using i.Scription. These lenses include:

The Zeiss 100% Customized Portfolio:

i.Profiler Approved Lenses

How does i.Scription differ from other wavefront prescriptions?

i.Scription differs from competing systems in several important ways:

1. i.Scription employs a proprietary prescription optimization algorithm developed by vision scientists at Carl Zeiss Vision (patent pending)

2. i.Scription incorporates the eye care professional’s subjective refraction during the calculation process.

3. i.Scription lenses are calculated and manufactured to one-hundredth of a diopter (0.01 D).

4. i.Scription is available on all a full range of customized lens designs and materials from ZEISS.

Do lenses using i.Scription correct the high-order aberrations of the eye?
It is not possible to correct the high-order aberrations of the eyes using spectacle lenses, because the eyes are constantly in motion behind the lenses. However, i.Scription optimizes the refraction values by considering the effects of the high-order aberrations of the patient’s eyes on vision quality. The resulting lenses are still defined by standard values such as sphere, cylinder, axis, and add.

What lenses may be ordered with i.Scription®?
i.Scription is available on the Zeiss 100% Customized portfolio; offering a Good, Better, Best selection in progressive designs and a Better and Best design in Single Vision. Most of these lenses have a VSP code associated with them. i.Scription is compatible with all materials and treatments available within this portfolio.

Does i.Scription work with any other brand of lens?
Only Carl Zeiss Vision has the proprietary calculation engine and the proprietary manufacturing process required to create ultra-precise lenses using i.Scription.

What is the difference between a conventional spectacle prescription and i.Scription?
Conventional spectacle prescriptions are typically determined using refractor-head and trial-frame lenses using various subjective refraction techniques that may be influenced by the presence of high-order ocular aberrations, rounding errors due to the use of one-quarter diopter lenses, and normal variations in subjective responses. i.Scription is a “wavefront-guided” spectacle correction that is optimized based upon both the low-order and high-order aberrations of the. i.Scription sphere and cylinder powers are calculated using a proprietary algorithm that maximizes vision quality to the nearest one-hundredth diopter in the presence of both low-order and high-order aberrations in order to deliver vision corrections with greater precision and accuracy in more viewing conditions, including twilight and nighttime vision.

Each i.Scription is also reconciled against the subjective refraction to ensure that deliberate modifications to the objective refraction—to ensure equal stimulus to accommodation for instance—are maintained in the final vision correction. i.Scription lenses are designed and fabricated using precision free-form surfacing equipment and technology patented by Carl Zeiss Vision.


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