WaveForm recently developed a proprietary process comprised of both software and a manufacturing system to produce optimized prescription contact lenses that asymmetrically align the optical zone of the lens to the pupil. The software algorithm corrects lower-order vision as well as high-order aberrations (HOAs) by converting the Zernike data measured by an aberrometer to a cutting file with the individual optical fingerprint. A state-of-the-art lathe then generates the optical fingerprint on soft contact lenses, which is directly placed on the eye’s surface to correct the patient’s vision. With funding from the Montana Board of Research and Commercialization Technology (MBRCT), WaveForm is able to successfully develop a wavefront-guided soft contact lens design and simplified fitting system to efficiently solve a breadth of vision problems. One of the first designs developed will be a multifocal design for the correction of presbyopia.

Over the past decade, technical advancements have improved WaveForm’s ability to accurately measure the eye’s entire optical pathway—revealing imperfections and HOAs that negatively impact vision. Drawing on these advancements, WaveForm’s proprietary software programs specifically identify and position multifocal reading segments in relation to each patient’s visual axis. More than 20 percent of the vision-corrected U.S. population suffers from uncorrected HOAs, with an additional 35 percent requiring presbyopic (near-vision) correction. Historically, these people have not been able to achieve fully corrected vision for both near and far—especially with currently marketed multifocal contact lenses, as conventional technology is manufactured in bulk with a one size fits all strategy.

WaveForm has invented three key technologies in the development of wavefront-guided progressive multifocal contact lenses. The first comprises a progressive multifocal contact lens design and fitting process invented by Principal Investigator Stephen Dunn, the second is commercially available wavefront aberrometry, a method of mapping optical ocular aberrations; and the third is proprietary software for processing and controlling the manufacture of wavefront guided progressive multifocal contact lenses.

2nd order
Progressive Lens, Pats. 5864379, 6540353.

The first technology is described by two patents owned by WaveForm. It was developed to address the current commercial lack of a viable progressive multifocal contact lens by delivering a method and process that individualizes the fit of a progressive contact lens to each patient’s eye.  Patents 6,540,353 and 5,864,379 provide a contact lens design that corrects progressive eye problems commonly seen in older patients by including concentric zones of correction.

Here is how it works:
A specially designed diagnostic lens made to the same exacting specifications as the final lens is placed on the eye. This lens has 3 fiduciary marks on it that are identified through WaveForm’s software as the eye is measured with an aberrometer.

Once the diagnostic lens settles, the patient is placed behind the aberrometer, and the entire optical system of the eye-including the diagnostic lens is then measured.

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Wavefront Process with Diagnostic Lens

The locations of the fiduciary marks relative to the pupil are noted during the measurement, and this allows for calculation of the x, y and rotation co-ordinates. This information is stored in the data set that is transmitted to WaveForm.

At this point, the initial fitting is completed, and the file generated by the aberrometer is sent to WaveForm so the contact lens order can be processed and manufactured. WaveForm receives the file through WaveForm’s website waveformlenses.com, and transmits it to Waveform’s proprietary algorithm. The final lens design is then calculated, and a cutting file is generated.

A 20 micron skim cut using oscillating tool lathing technology is then made on the front surface of the contact lens, incorporating all of the Zernike data for the correction of the patient’s low-and high-order aberrations. The x, y and rotation information tells the lathe how to position all of these complex optical corrections on the surface of the lens.

contact lens optics

As a result of this technology, patients will see better, especially under low-light conditions. Images at night will be sharper, colors more vibrant and both near and far vision will be corrected without compromise.

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