eye chart


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eye chart

n.
A chart of letters and figures of various sizes, used to test visual acuity.
References in periodicals archive ?
Eye charts are subjective measures of sight, says Katherine High, director of the Center for Cellular and Molecular Therapeutics at Children's Hospital of Philadelphia, which sponsored the study.
It not only evaluates how well an individual sees an eye chart, but also how well the person views faces, street signs, and newspaper print.
In a further test carried out by Warwick University, 65% of those who failed a basic eye chart test were drivers.
To the rescue is Alchemy's new Medic Emergency Eye Kit priced at $42 that looks like a real first-aid kit with an eye chart on the flip-top lid.
In an open label safety study involving 26 patients with ocular histoplasmosis, visual acuity improved by an average of more than 1 line on a standard eye chart at 12 months (6.
The decor includes such gems as a doctor's scale, an eye chart, an old-fashioned wheelchair, anatomically illustrated bedding, and storage space in an examination table with stirrups.
Inability to perceive the big E on a Snellen eye chart indicates very poor vision.
Some eye opening advice to educators and parents: Don't be overly impressed that children can pass an eye chart test with a 20/20 score.
11 (the ability to distinguish the largest eye chart symbol from a distance of 5 meters).
After an average of three years following the operations, 22 of the 43 eyes experienced improvement, raising average seeing ability to a level by which patients could identify the largest symbol on a standard eye chart from a distance of 1 meter.
In 1993, almost all surgeons planned refractive surgery based entirely on a patient's refraction, a test that determines the corrective lenses a patient needs to view the standard eye chart.
The Snellen, or "Big E," eye chart is a good screening tool, but it is only a screening tool.