• Visual acuity reference range

  Use the slider below to see how your results affect your health.

  {ratio}

  0.02

  0.04

  0.125

  0.32

  0.8

  Your result is Normal vision.

  US: 20/25 to 20/12 (Metric: 6/7.5 to 6/4)
  Visual acuity is expressed as a decimal or a fraction. 1 = US 20/20 or metric 6/6 is considered optimal vision.

  • The top number refers to the distance you stand from the chart. This is often 20 feet (6 meters).
  • The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read.
• Visual field reference range
• Eye muscle function reference range
• Pupil dilation reference range
• Pupil response reference range
• Eye pressure reference range
• What is a dilated eye exam?
• How often do I need to get a dilated eye exam?
• What happens during a dilated eye exam?
• How does dilation work?
• What happens after a dilated eye exam?

• Visual acuity reference range

  Use the slider below to see how your results affect your health.

  {ratio}

  0.02

  0.04

  0.125

  0.32

  0.8

  Your result is Normal vision.

  US: 20/25 to 20/12 (Metric: 6/7.5 to 6/4)
  Visual acuity is expressed as a decimal or a fraction. 1 = US 20/20 or metric 6/6 is considered optimal vision.

  • The top number refers to the distance you stand from the chart. This is often 20 feet (6 meters).
  • The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read.
• What is a visual acuity test?
• References

Normal reference ranges can vary depending on the laboratory and the method used for testing. You must use the range supplied by the laboratory that performed your test to evaluate whether your results are "within normal limits."

• Fix-and-follow reference range

  Use the slider below to see how your results affect your health.

  Your result is Pass.

  A pass result means the baby's both eyes follow the target easily and smoothly, indicating adequate development of visual perception.
• Red reflex reference range
• Visual acuity reference range
• Color vision reference range
• What is vision screening?
• What is it used for?
• Why do I need vision screening?
• What happens during vision screening?
• Will I need to do anything to prepare for vision screening?
• Are there any risks to screening?
• What do the results mean?
• Is there anything else I need to know about vision screening?
• References

• Visual Field Test Reference Range

  Use the slider below to see how your results affect your health.

  Your result is Normal.

  The peripheral vision is normal.
• What are visual field tests?
• References

Normal reference ranges can vary depending on the laboratory and the method used for testing. You must use the range supplied by the laboratory that performed your test to evaluate whether your results are "within normal limits."

• Eye Pressure Reference Range

  Use the slider below to see how your results affect your health.

  mm Hg

  10

  21

  Your result is Normal.

  A normal result means your eye pressure is within the normal range. However, the thickness of your cornea can affect measurements. A corneal thickness measurement (pachymetry) is needed to get a correct pressure measurement.
• How is intraocular pressure measured?
• References

Normal reference ranges can vary depending on the laboratory and the method used for testing. You must use the range supplied by the laboratory that performed your test to evaluate whether your results are "within normal limits."

• What kinds of eye examinations are there?

  Eye examinations tend to follow a certain pattern: After talking with your doctor about the type and severity of your symptoms, both eyes will usually be tested to measure the visual acuity (sharpness of sight). Then the doctor will look at your eyes from the outside, take a closer look at them using a slit lamp, and measure the intraocular pressure (the pressure inside the eyeball). Eye drops are given before some tests to dilate (enlarge) the pupil of the eye for a certain amount of time. This makes it easier for the doctor to see the back of the eye. Depending on the symptoms and any other medical conditions you may have, the eye examination might be carried out differently and additional tests might be done.

• What do general eye examinations involve?
• How is visual acuity measured?
• How else can your vision be tested?
• What are visual field tests?
• What are slit-lamp examinations?
• What is ophthalmoscopy?
• How is intraocular pressure measured?
• Further eye examinations
• References