The Snellen scale is a standardised visual acuity chart used to measure how well a person can see at a distance. You must also have an adequate field of vision.

According to Gov.uk: "You must also meet the minimum eyesight standard for driving by having a visual acuity of at least decimal 0.5 (6/12) measured on the Snellen scale using both eyes together ...

An online visual acuity test is, essentially, an at-home version of the Snellen chart. Instead of looking through a Phoroptor, you look at a series of prompts, like letters that decrease in size ...

Visual acuity is tested by reading black letters against a white background (Snellen chart) in indoor conditions with bright lights. It is a high-contrast procedure designed to test the sharpness ...

A novel, at-home test was accurate and reliable in measuring near visual acuity and may be a helpful self-monitoring tool for patients with chronic ocular conditions or limited access to ...

A self-eye exam entails using digital technology to perform a visual acuity test from the comfort of your home. This approach can benefit those who cannot visit an eye care provider due to ...

Download this Snellen Chart Eye Test Medical Illustration Line Vector Sketch Style Outline Isolated On White Background Vision Board vector illustration now. And search more of iStock's library of ...

The Snellen test uses a chart that contains letters or symbols. These letters are arranged into rows — each row becoming progressively smaller and smaller down the chart.

Next, ask the patient to cover one eye. Then, perform a visual acuity test of the other eye, using a Snellen chart or a handheld chart about 14 inches (36 cm) from the patient’s face.

Usually a chart called the Snellen’s chart is used. It contains progressively shortening random letters and numbers and is placed 6 meters away from the patient. The patient is asked to read the ...

You must also meet the minimum eyesight standard for driving by having a visual acuity of at least decimal 0.5 (6/12) measured on the Snellen scale (with glasses or contact lenses, if necessary ...