A startup wants to give you an eyeglass prescription without you having to set foot in an optometrist's office

That experience could be heading for a massive makeover, complete with an iPhone-powered device that's a fraction of the size.

The technology, from the New York-based Smart Vision Labs, is designed to complete an eye exam in just a few minutes and doesn't require the in-person assistance of an eye doctor.

Smart Vision officially launched for use in stores in July 2016, and it has made its way into 50 stores. The company raised $6.1 million in 2015 in a round led by TechStars Ventures.

Business Insider has also learned that Warby Parker has recently started piloting the device at a few of its New York City locations, including Grand Central Station.

Heres how it works:

The results are pretty straightforward. I took the test as a demo, comparing the result to my eyeglasses prescription. The test reached the same conclusion my optometrist had a few weeks ago when I went in for a checkup.

The device is based on a combination of old and new technology that Smart Vision has developed, CEO Yaopeng Zhou told Business Insider. For example, the pupillary distance test, which measures the distance between your eyes' pupils, has traditionally been done with a binocular-like device. The visual acuity isn't any different (just smaller) from your traditional letter chart.

The refraction error test — which measures the shape of your eyes to determine what kind of prescription you might need to correct your vision — is the one Smart Vision spent the most time turning into a cheaper, portable technology. It uses technology adapted from what doctors use in Lasik surgery, which is used to correct a person's eyesight.

Smart Vision's technology has been cleared by the Food and Drug Administration, and the site links to two published papers validating the technology, both funded by the company. As far as accuracy goes, Zhou said it had a 1% remake rate — much lower than the 10% average for traditional optometry practices.

It's important to note, however, that you won't be getting a full workup, like getting your eyes dilated (which can detect eye problems). If a test picks up on anything, Zhou said, the company will let you know to consult a doctor.

This kind of approach worries some eye doctors, who are concerned telemedicine approaches like Smart Vision, in which there a doctor isn't necessarily in the room, could be bad for patients.

"Telemedicine as a tool to help a doctor better care for a patient is absolutely acceptable to most doctors including myself," April Jasper, a practicing optometrist who is the president of the Florida Optometric Association, told Business Insider in an email. "When telemedicine is advertised and promoted as a substitute for a comprehensive eye health examination, most doctors are going to have a serious concern for our patients safety."

Essentially, there's a time and a place for which it could be helpful, but there may not be a future in which we can just get our eyes tested through a series of remote tests without any direct doctor supervision.

"There is no telemedicine technology at this time that is a substitute for a comprehensive eye health evaluation and many of the companies out there are misleading patients into thinking their technology performs as a replacement," she said. "And a disclaimer in small print does not justify placing a patients vision or even life is at risk."

Finding a market in glasses stores, pharmacies, and on the go

Beyond its use in the pilot program at Warby Parker, Smart Vision hopes to place the device in other nontraditional spots that don't necessarily have an optometrist.

Zhou said his goal was to have the device in retail stores and pharmacies and in use in developing countries, since it's portable.

Smart Vision provides the hardware free, instead charging a fee for each assessment the location performs.

Zhou says the stories using their technology have seen a "big jump in revenue."

Today, the technology is being used in San Francisco, Los Angeles, San Diego, and around New York state (mainly in the city).

A startup wants to give you an eyeglass prescription without you having to set foot in an optometrist's office

Heres how it works:

Finding a market in glasses stores, pharmacies, and on the go

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