Eye Pressure Test (Tonometry)

Tonometry is a routine procedure that tests your eye pressure during routine eye exams. Either an optometrist or an ophthalmologist can perform the exam. The test is done to ensure the health of your eyes, since elevated eye pressure can lead to eye diseases such as glaucoma and even blindness.

The tonometry test can identify abnormally high intraocular pressure or IOP. Normal IOP readings are between 12 and 20 millimeters of mercury (mmHg). An intraocular pressure higher than 20 mmHg can lead to or be an indication of existing glaucoma. Untreated glaucoma can lead to blindness.

While every child should receive a complete eye exam before the age of two, a tonometry test is not usually performed on children unless surgery had been performed to correct a cataract. For children older than three, every two to five years is acceptable for a test, as long as there’s no hereditary history of eye problems. Eye exams should take place every year, however, for children with a family history of eye diseases

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