HEV filtered contact lens technology helps reduce light scattering

HEV filtered contact lens technology helps reduce light scattering

John Buch, OD, MS, JJV shares an replace on the corporate’s HEV filter contact lens on the 2022 American Academy of Optometry assembly in San Diego

Editor’s observe: This transcript has been edited for readability.

So I am Dr. I am John Buch. I’m a Senior Principal Analysis optometrist at Johnson and Johnson Imaginative and prescient.

And the unmet want our staff introduced with this lens arose from market analysis that confirmed individuals are actually spending an excessive amount of time on digital gadgets. We additionally know that when engaged on a digital system, you blink far lower than you do in regular dialog. And everytime you blink much less, you are establishing this chance for an unstable tear movie, which in itself could cause poor consolation and poor imaginative and prescient.

So we checked out this knowledge, and there was knowledge on that, together with the truth that individuals have been dissatisfied with their present contact lenses. And we felt it was time to convey one thing higher to market.

So bringing the Max to market already means excellent efficiency for affected person care and for digital system use, so individuals who spend a whole lot of time on digital screens can get a particular profit for them. As a result of we additionally know that they blink much less, and we all know that this lens has a expertise that lengthens the tear movie and in addition permits the lens to retain extra moisture; it would not evaporate that shortly.

Additionally, it has a particular software for the aged inhabitants. As a result of we all know that as we age, once we attain the age of fifty, the soundness of the tear movie decreases by 50%. We additionally know that as you age, your intraocular scattering will increase; It doubles at age 60 and triples at age 70. Subsequently, this lens has applied sciences to fulfill these wants.

The HEV part, which is the filtering part of this contact lens, has the primary perform of lowering gentle scattering. And light-weight scattering in itself has many different results together with it. In addition to having a direct impact on our notion of sunshine sensitivity and glare. So this HEV filter straight impacts that metric.

In different phrases, a few of the HEV gentle sources that we outline as about 380 to 500 nanometers, the primary supply of that gentle is in fact daylight. You exit, it’s totally, very sturdy exterior. So truly, everytime you’re exterior and each time you are close to a window, you are in all probability uncovered to it as a result of some home windows particularly filter out part of it, however not all of it. So you’re consistently uncovered. Now, some cool white LED lights may even begin to emit wavelengths on this vary, however the dominant wavelength is definite to come back from the solar.

So HEV gentle is the shorter finish of the seen spectrum, the shorter wavelength finish; is the next vitality. And we all know from Rayleigh scattering that it is simply physics, the upper the vitality, the shorter the wavelength. It scatters far more gentle within the orange and crimson wavelengths than within the longer wavelengths.

The OptiBlue filter expertise we put into this lens is definitely a chromophore that we have to particularly formulate for this lens for a variety of causes. First, we would have liked to get the transmission spectrum we needed from the lens, plus – observe that the chromophore needed to marry our contact lens substrate, it needed to play good with our contact lens supplies.

The TearStable expertise included on this lens actually comes from how the lens is manufactured. We needed to develop a very completely different manufacturing approach as a result of while you add a chromophore to our lenses and attempt to enhance them, there’s some competitors there. The chromophore would not heal prefer it did when it got here out. Subsequently, the manufacturing approach we use permits our wetting agent polyvinylpyrrolidone to be extra evenly distributed all through the lens matrix in addition to on the lens floor.

What we all know now’s that we have been capable of show that topics carrying Acuvue Oasys Max have been 1.6 occasions extra more likely to have secure tear movie past 10 seconds in comparison with Acuvue Oasys 1-Day. And the explanation that is necessary, and the way it pertains to metrics like consolation, is as a result of the peripheral separation time on the tear is related to the sensation of discomfort. So if we are able to lengthen the time this occurs, it can, and will, lengthen their consolation.

Photostress restoration time is a check that has existed for many years. And it is usually used to tell apart between issues between the macula, or is it an optic nerve problem? It has been used for this for a very long time however is a measure of visible perform. However when the eyes are uncovered to a really shiny gentle supply or a long-term gentle supply, and what you’re doing is definitely whitening the retina; you get this after the picture you possibly can’t see. Then when that gentle supply is eliminated, we merely measure how briskly it takes in your imaginative and prescient to return? And that is the restoration time of photostress.

Subsequently, we carried out a examine that checked out photostress restoration time and bothersome glare. And what we discovered on this examine was that topics carrying Acuvue Max lenses had a 24% discount in photostress restoration time and a forty five% discount in annoying glare in comparison with lenses with out the blue violet filter in them. Acuvue Oasys was 1-Day.

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