eye chart

This means you can read an eye chart at 20 feet about as well as someone with normal vision could read it at 200 feet.

These range from the concise visual acuity test, which makes use of the eye chart, to the high-tech, machine-aided Subjective Refraction test, and the Auto-Refractometer test.

He explained that visual acuity is a key component in the standard eye-glasses prescription test, where patients "specifically identify the letters on the eye chart."

The new measure, a multi-luminance mobility test (informally called the maze), measured the impact of the treatment beyond the traditional visual acuity measure -- the eye chart.

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Survey questions included the following: which treatment, focal grid laser or injection, made you more anxious before and after the procedure; which hurts more; which works better; which do you prefer; which is easier; how many lines on the eye chart would you be willing to lose to receive fewer treatments; would you be willing to come in every month for treatment; and which treatment allows you to drive from the office after being treated.

The basic eye chart test, which gauges vision at various distances.

"Back then, we were seeing a lot of people with MS who would say that their vision wasn't quite right, even when it was 20/20 on a standard black-and-white eye chart," says Dr.

(14) While that study did report some improvement with spinal manipulation, the outcome measure which the authors used was novel and did not take into account the logarithmic scaling of the Snellen eye chart used to measure acuity.

17 August 2015 - US-based eye chart and LED-based illumination cabinets manufacturer The Good-Lite Co.

Even appalling: Of the kids across the three schools who couldn't read the eye chart, 10 percent had vision that was no longer correctable to 20/20, even with glasses or treatment.

And when given a standard eye chart, they could correctly identify more letters.

Reading an eye chart measures visual acuity, Kondrot explains.

To be fair, Advanced Cell published research in Lancet, which found that about half of the 18 people who used its product were able to read two rows on an eye chart.