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A common question asked during the eye exam is, “When is the puff coming?”  

Patients are referring to air-puff or non-contact tonometry. Tonometry is the procedure used to measure eye pressure, and this is important for diagnosing and monitoring glaucoma.

In non-contact tonometry, a puff of air is used to measure the pressure inside the eye.  The benefit of this test is there is no actual contact with the eye, but the air puff is sometimes very startling for patients. Some people hate that test and it isn’t the most accurate way to measure your eye pressure.

Some doctors don’t even use the air-puff test. Instead, they place a yellow drop that consists of a numbing medicine and then shine a blue light on the eye. This is done in front of the slit lamp and a small tip gently touches the eye to measure the eye pressure. This procedure is called Goldmann tonometry and is considered the gold standard for measuring eye pressure.  

Another method for checking eye pressure is the Tonopen. This is a portable, hand-held instrument that is useful when patients can’t sit in front of the slit lamp to have their eye pressure checked. The Tonopen also requires a numbing drop to be placed in the eye, and the tip gently touches the eye.

A common question related to tonometry is “what normal eye pressure?”

Normal eye pressure ranges from 10-21 mm Hg. Eye pressure doesn't have any relationship to blood pressure. Many times, people are surprised that their eye pressure is high, but they have normal blood pressure. In general, there is no diet or exercise that will significantly affect eye pressure. It is therefore important to have your eye pressure checked regularly because there are usually no symptoms of high eye pressure until it has affected your vision.

Article contributed by Dr. Jane Pan

Not everyone understands the importance of sunglasses when the weather turns cold.

Polarized sunglasses are usually associated with Summer, but in some ways it is even more important to wear protective glasses during the Winter.

It’s getting to be that time of year when the sun sits at a much different angle, and its rays impact our eyes and skin at a lower position. This translates to an increase in the exposure of harmful UV rays, especially if we are not wearing the proper sunglasses as protection.

Polarized sunglasses, which are much different than the older dye-tinted lenses, are both anti-reflective and UV resistant. A good-quality polarized sunglass lens will protect you from the entire UV spectrum. This not only preserves your vision, but it also protects the skin around the eyes, which is thought to have a much higher rate of susceptibility to skin cancer.

Snow poses another issue that can be countered by polarized sunglasses.

Snow on the ground tends to act as a mirror because of its white reflective surface and this reflection can become a hindrance while driving. The anti-reflective surface of polarized sunglasses helps reduce the glare and gives drivers improved visibility.

Polarized sunglasses come in many different options based on a patient’s needs. Whether it’s single-vision distance lenses, bifocals, or progressive lenses, there is a polarized lens for every patient.

Winter is a great time of year to ask your optical department about purchasing polarized sunglasses.

 

Article contributed by Richard Striffolino Jr.

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