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.
Eye exam charts, or Snellen eye charts, are available online at the websites of Vision Source or Disabled World. Vision Source has one eye chart available for print, whereas Disabled World has four printable eye charts.
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.
Eye exam charts do not change on a regular basis. There are, however, a variety of different charts that are widely used to measure visual acuity. Therefore, the eye exam chart may differ depending on where the exam is taking place and who is being examined.
Common eye exams include an eye muscle test, refraction assessment, perimetry, glaucoma screening and visual acuity test, reports Mayo Clinic. Other eye exams include color vision testing, retina examination and slit-lamp examination.
The best place to get an eye exam is at an ophthalmologist's office, according to WebMD. Ophthalmologists are eye doctors that can treat every possible eye disease, perform eye surgery and also provide eyeglasses fittings and contact lenses to patients, reports Eye Care America.
Printable eye test charts are available from websites for Vision and Disabled World. Vision Source provides a downloadable eye chart along with instructions for how to conduct a vision test. The chart provided on both sites is the traditional Snellen eye chart.
An online eye exam is not as effective as an in-person comprehensive eye exam by an ophthalmologist, explains the American Optometric Association. This is because online eye exams focus on refraction only and do not critically examine the patient's eye to identify other health issues that could caus
It is possible to take an eye exam online through a vision website to receive a general diagnosis, notes Zeiss.com. Sites such as Essilor.com and Opternative.com help give patients an idea of whether or not they need to visit the doctor for a more thorough exam.