The different types of eye charts include the Snellen chart, the Landolt C chart, the logMAR chart and the Jaeger chart. The Tumbling E chart is a modification of the Snellen chart for the very young or the illiterate who do not recognize the letters of the alphabet.
Not all eye chart tests are the same, according to All About Vision. Different types of eye chart tests include the Snellen chart, the tumbling E chart and the Jaeger chart.
Download an eye chart such as a Snellen or Sloan eye chart from VisionSource.com, or use Dok LLC's mobile app Eye Chart Pro, as of 2015. Vision Source's eye chart comes in a PDF format and is printable once downloaded.
The Disabled World website makes available multiple versions of printable Snellen eye charts. This is the type of chart used in ophthalmologists' offices, and it can also be used at home to test visual acuity, as Disabled World points out.
A human eye color chart helps determine eye color. It was once used to calculate the odds of babies having certain eye colors based on the eye colors of their parents and grandparents.
An eye pressure range chart is read by understand that "mmHg" is millimeters of mercury, which is the scale for recording eye pressure, according to Glaucoma Research Foundation. Normal eye pressure varies throughout the day, but average pressure is somewhere between 10 and 21 millimeters of mercury
The Tumbling E and Snellen eye charts are the most widely used eye exam charts. Other less common eye charts include Landolt C, logMAR, Rosenbaum table, Lea Test and Golovin-Sivstev table.
Health care professionals test visual acuity by evaluating how well a patient can see letters on a chart from different distances, states Healthline. The Snellen test is one common format that involves reading rows of letters or symbols of various sizes from a chart positioned 14 to 20 feet away.
Vision Source has a printable eye exam chart that is useful for checking vision at home, and Occuvision provides access to a similar chart as well as a Tumbling E exam chart for young children. Home tests are not a substitute for a visit to licensed eye care professional.
To use a standard eye exam chart, stand 20 feet away from the chart and read the smallest line of letters you can see. Each line corresponds to a certain level of visual acuity.