To analyse subject motion during distance vision testing, a fixed marker exactly 3 m from the distance test chart was placed beyond the subject (Figure 1). Any motion of the subject forward or ...

The test-retest variability of the charts was similar, with the 95% tolerance limit for change being ±0.14 logMAR for ETDRS, ±0.16 for reduced logMAR and ±0.18 for Snellen.

There are two standard ways to test vision. One is with a traditional letter chart that shows progressively smaller letters as patients read down each line.

This phone-powered vision test can replace your eye doctor It's the easiest way yet to get an accurate eyeglass prescription.

EyeSpy 20/20 is a 21st-century answer to the 150-year-old wall chart used in vision screenings.

A color vision test, also known as the Ishihara color test, measures your ability to tell the difference among colors.

The chart, published in 1907 and measuring 22 inches by 28 inches, was double-sided, featuring black text on a white background on one side and white text on a black background on the other.

Need new glasses? Online eye exams and vision tests offer a convenient way to get a glasses prescription. Doctors explain whether these services are worth trying.

Sankara Nethralaya, which pioneered the scientific self-testing visual acuity chart in Tamil, is now set to take the tool to various places across the State. The Tamil log MAR (logarithmic minimal ...