Top Eye Charts used by Optometrists. Optometrists use eye charts as a basic vision check. Today many variations of the eye chart exist. The four most common eye charts used are: 1. Snellen. The original eye chart designed in the 1860’s by the Dutch eye doctor Hermann Snellen. The first line on this chart is a giant letter E.
Tonometry is a quick and simple test that checks the pressure inside your eyes. The results can help your doctor see if you’re at risk for glaucoma. Glaucoma is a disease that boosts the pressure inside your eyes.
A cover test is an eye exam that determines if a patient has any ocular deviation. Essentially, the test is measuring eye alignment and trying to figure out whether one eye is working harder than the other is.
You may think your eyes are healthy, but visiting an eye care professional for a comprehensive dilated eye exam is the only way to really be sure. During the exam, each eye is closely inspected for signs of common vision problems and eye diseases, many of which have no early warning signs.
What is a: Phoropter A phoropter is an instrument used to test individual lenses on each eye during an exam. If, during an eye examination, your doctor has discovered a vision problem like nearsightedness, farsightedness or astigmatism, it's likely that one of the next steps you'll take will involve a phoropter.