About Cynthia Kiernan

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So far Cynthia Kiernan has created 434 blog entries.

Vision Correction for Sports Participation

There are many options available to adults and children for corrective lenses (glasses and contacts) when engaged in physical activities.

Here is a look at the different modalities and the pros and cons of each:

Prescription Sports Goggles (e.g., Rec Specs)

The main benefits of goggles while playing sports are vision stability and eye protection. When playing fast-moving sports–like basketball, soccer, and rugby–elbows, wrists, and heads fly around at high speed, increasing the risk of eye injury. The eyes and eye sockets can be protected when covered by shatter-proof lenses. Additionally, there is no worry over having a contact lens pop out of the eye, which can be a debilitating experience for some people. The main drawback to goggles is that they can be cumbersome, decrease peripheral vision, and fog up. Additionally, very high prescriptions might not be available due to frame limitations. On the whole, this is a very good option for many people. One additional advantage to sports goggles is that […]

2025-04-15T04:00:00+00:00April 15th, 2025|Blog|

Hydroxychloroquine and Your Eyes

Hydroxychloroquine (Plaquenil) was originally used to treat malaria and is now commonly used to treat rheumatological and dermatological diseases. It is frequently used for rheumatoid arthritis (RA) and Lupus and is often very effective in mitigating the joint and arthritic symptoms these diseases can cause.

One of the most significant side effects of the drug is its possibility of causing eye problems resulting in blurred or decreased vision. The most common issue is damage to the retina. It can impair color vision or damage the retinal cells, particularly in the area right around the central vision.

In your retina, the area that you use to look straight at an object is called the fovea. The fovea is the area that provides you with the most definition when looking at an object. The area just around the fovea is called the macula and it has the ability to see objects with slightly less definition than the fovea but significantly better than the rest of your retina, which accounts for your peripheral vision. The most common place for hydroxychloroquine […]

2025-04-08T04:00:00+00:00April 8th, 2025|Blog|

Having Vision Issues After a Concussion or TBI?

The Centers for Disease Control estimates that around 2.8 million people in the United States suffer from a traumatic brain injury (TBI) every year, and vision can be affected.  Concussions are a type of TBI.

The rate of childhood TBI visits to the emergency department more than doubled between 2001 and 2009, making children more likely than any other group to go to the ER with concussion symptoms.

It was once assumed that the hallmark of a concussion was a loss of consciousness. More recent evidence, however, does not support that. In fact, the majority of people diagnosed with a concussion do not experience any loss of consciousness. The most common immediate symptoms are amnesia and confusion.

There also are multiple visual symptoms that can occur with a concussion, either initially or during the recovery phase.

Visual symptoms after a concussion include:

  • Blurred vision.

  • Difficulty reading.

  • Double vision.

  • Light sensitivity.

  • Headaches accompanying visual tasks.

  • Loss of peripheral vision.

Most people with visual complaints after a concussion have 20/20 distance visual acuity, so more specific testing of near acuity, convergence amplitudes, ocular motility, and peripheral vision must […]

2025-04-01T04:00:00+00:00April 1st, 2025|Blog|

Cataract Surgery and Anesthesia

The majority of cataract surgeries performed in the U.S. are done with a local anesthetic and IV sedation.

The local anesthesia may be accomplished in one of two ways: either an injection of anesthetic around the eye or anesthetic eye drops placed on the eye, often combined with an injection of a small amount of anesthetic into the front of the eye at the very beginning of surgery.

The injection of anesthetic around the eye generally produces a deeper anesthesia for the surgery than the topical method but it also comes with increased risk. There is a very small chance of potentially serious bleeding behind the eye and a rare chance of inadvertent penetration of the back of the eye with the injection needle.

The topical anesthesia has lower risk but does not provide quite as much numbing, although the overwhelming majority of people having cataract surgery with a topical anesthetic do not experience any significant pain during the procedure. 

The other difference between the two types of anesthesia is that with topical anesthesia you maintain your ability to move […]

2025-03-25T04:00:00+00:00March 25th, 2025|Blog|

9 Intriguing Facts About Green Eyes

In honor of St. Patrick’s Day and the “wearin’ of the green,” we thought it would be fun and fitting to share some interesting facts about green…eyes!

#1

Green is the rarest eye color. If your sparklers are truly green, you are something of a unicorn… only about 2% of the world’s population sport this hue. 

#2

Green-eyed people can be found all around the globe. There is a Chinese village, Liqian, where a high percentage of the population sports green eyes and lighter hair.

#3

There isn’t any actual green pigment in a green eye. Melanin, a natural pigment that helps determine our skin, hair, and eye color, […]

2025-03-11T04:00:00+00:00March 11th, 2025|Blog|

What is Tonometry?

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, […]

2025-03-04T05:00:00+00:00March 4th, 2025|Blog|

The Freaky Symptoms of Ocular Migraines

Have you ever seen a temporary black spot in your vision? How about jagged white lines? Something that looks like heat waves shimmering in your peripheral vision?

If you have, you may have been experiencing what is known as an ocular migraine. Ocular migraines occur when blood vessels spasm in the visual center of the brain (the occipital lobe) or the retina.

These optical migraines can take on several different symptoms, but they typically last only from a few minutes to an hour. They can take on either positive or negative visual symptoms, meaning they can produce what looks like a black blocked-out area in your vision (negative symptom), or they can produce visual symptoms that you see but know aren’t really there, like heat waves or jagged white lines that look almost like lightning streaks (positive symptoms).

Some people do get a headache after the visual symptoms but most do not. They get the visual symptoms, which resolve on their own in under an hour, and then generally just feel slightly out of sorts after the episode […]

2025-02-25T05:00:00+00:00February 25th, 2025|Blog|

Giving Your New Glasses a Chance

Eye doctors typically pride themselves on being able to improve someone’s vision through glasses or contact lens prescriptions. Whether it’s a first-time glasses wearer, or someone having either a small or large change in their prescription, we like to aim for that goal of 20/20 vision.

Despite our best efforts, however, correcting vision to 20/20 is not always a positive outcome for the patient. Whether someone will be able to tolerate their new prescription is based on something called neuroplasticity, which is what allows our brains to adapt to changes in our vision.

You or someone you know may have had this happen: Your vision was blurry, so you went to the eye doctor. The doctor gave you a new prescription, but after you received your new glasses, things seem “off.”

Common complaints are that the prescription feels too strong (or even too clear!) or that the wearer feels dizzy or faint. This is especially true with older patients who have had large changes in their prescriptions, since neuroplasticity decreases with age. It is also more likely to […]

2025-02-18T05:00:00+00:00February 18th, 2025|Blog|

Have You Heard About MIGS?

For over 40 years the standard surgical treatment for glaucoma was a procedure called a trabeculectomy.

In a trabeculectomy, the ophthalmic surgeon would make a hole in the wall of eye to allow fluid from the inside of the eye to flow out of the eye and then get resorbed by the blood vessels in the conjunctiva (the mucous membrane that covers the white part of the eye).

This surgery often resulted in a large decrease in the Intraocular Pressure (IOP). Reducing the IOP is the goal of glaucoma surgery because multiple studies show that if you can reduce the pressure the progression of glaucoma slows.

The problem with trabeculectomy is that although it frequently lowers the pressure, it also has a fairly high complication and/or failure rate. This led to some reluctance to perform the procedure unless the glaucoma was severe, or the pressure was very high. As a result of those issues there has been a search during the last 40 years for something that had a lower complication rate and could be more easily deployed […]

2025-02-11T05:00:00+00:00February 11th, 2025|Blog|

Chances Are Good You Have These Mites in Your Eyelids

Demodex folliculorum — often just called demodex —  is a mite that occurs naturally on many people's faces and resides in hair follicles, particularly the follicles of eyelashes. Most of the time, these mites cause no problems whatsoever. However, sometimes an infestation can become particularly parasitic, resulting in unhealthy eyelid margins.  This inflammation of the eyelid is called blepharitis.  Blepharitis can be caused by caused by several things, including allergies, bacterial overgrowth, Rosacea and also by demodex.

Often, diagnosis of mite infestation by your eye doctor can be difficult.  The symptoms can mimic other causes of blepharitis, which is one of the most prevalent diseases we see.

The most common sign of a demodex infestation is a cylindrical cuff or "sleeve" at the base of the eyelash. Symptoms include redness, itching, burning, dry eyes and general discomfort in the eyelid.

The probability of demodex infestation increases gradually with age, with nearly 100% of people having demodex in their eyelashes after age 70.  If there are no symptoms present, nothing needs to be done about demodex, as they are […]

2025-01-29T05:00:00+00:00January 29th, 2025|Blog|