About Cynthia Kiernan

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So far Cynthia Kiernan has created 414 blog entries.

Texting and Driving? Not a Good Combo.

There are many opinions on the topic of texting and driving. The goal of this blog is to explore the effects on vision during texting.

So why does texting make you more likely to crash from a visual perspective? The problem lies in distraction from driving. For example, it takes a fast texter approximately 20 seconds to read and reply to a text. At 55 mph on the highway, a driver glances away from the road for approximately one-third of a mile. When the driver is focusing on their screen, this essentially gives the driver tunnel vision, causing the visual system to essentially use peripheral vision for driving. Your central vision is used to detect depth perception, detail, and colors such as red or green. So when texting, your depth perception, or 3-D vision, is altered and if cars are stopped ahead or closing in rapidly, it's not as easily detected. Colors, such as red brake lights or traffic signals, are not as easily noticed.

Next time you encounter situations with texting and driving, know that […]

2020-03-17T04:00:00+00:00March 17th, 2020|Blog|

Is My Eye Bleeding?

We commonly see patients who come in saying that their eye is bleeding.

The patients are usually referring to the white part of their eye, which has turned bright red. The conjunctiva is the outermost layer of the eye and contains very fine blood vessels.  If one of these blood vessels breaks, then the blood spreads out underneath the conjunctiva. This is called a subconjunctival hemorrhage.

A subconjunctival hemorrhage doesn't cause any eye pain or affect your vision in any way. Most of the time, a subconjunctival hemorrhage is asymptomatic.  It is only noticed when looking at the mirror or when someone else notices the redness of the eye.  There should not be any discharge or crusting of your lashes.  If any of these symptoms are present, then you may have another eye condition that may need treatment.  

What causes a subconjunctival hemorrhage?  The most common cause is a spontaneous rupture of a blood vessel.  Sometimes vigorous coughing, sneezing, or bearing down can break a blood vessel.  Eye trauma and eye surgery are other causes […]

2020-03-10T04:00:00+00:00March 10th, 2020|Blog|

Is My Eye Makeup Making My Dry Eyes Worse?

Dry Eye Disease affects more than 5 million people in the United States, with 3.3 million being women and most of those being age 50 or over. And as people live longer, dry eye will continue to be a growing problem.

Although treatment options for dry eyes have improved recently, one of the most effective treatments is avoidance of dry eye triggers.

For some that might mean protecting your eyes from environmental triggers. To do that experts recommend using a humidifier in your home, especially if you have forced hot-air heat; wearing sunglasses when outside to help protect your eyes from the sun and wind that may make your tears evaporate faster; or being sure to direct any fans  – such as the air vents in your car – from blowing directly on your face. For others, it may mean avoiding medications that can cause dry eyes.

There is one other trigger that may need to be avoided that doesn’t get as much notice: the potentially harmful ingredients in cosmetics.

Cosmetics do not need to prove […]

2020-03-03T05:00:00+00:00March 3rd, 2020|Blog|

Why You Need to Bring Your Current Glasses Even if You Hate Them

Despite requests that patients bring their current glasses to their office visit, many show up without them.

Sometimes it’s an oversight: “I was rushing to get here and forgot them”; “I left them in the car”; “I picked up my wife’s glasses instead of mine by mistake.” Doctors have heard them all.

Sometimes it is unavoidable: “I lost them”; “They were stolen”; “I ran them over with the car”; “I left them on the roof of the car and drove away and now they are gone.”

Frequently, however, it’s intentional. There is a perception by some people that if they don’t like their current glasses or feel like they are not working well for them that they are better off having their eye doctor start from scratch. “Why would I want the doctor to utilize a pair of glasses I’m not happy with as a basis or starting point for my next pair of glasses?”

But bringing your glasses to an appointment is important.

There are two main reasons for eye care professionals to know what […]

2020-02-25T05:00:00+00:00February 25th, 2020|Blog|

Can I Have Cataract Surgery if I Have Macular Degeneration?

We are frequently asked if it’s wise to have cataract surgery if you have Macular Degeneration.

Let’s start with some background.

  1. Cataracts and Age-related Macular Degeneration (AMD) are both leading causes of visual impairment in the elderly population.
  2. Cataracts develop when the normal clear lens gets cloudy with age. This is correctable with cataract surgery, which involves replacing the cloudy lens with a clear, artificial lens.
  3. While cataracts affect the front part of the eye, AMD causes damage to the retina, which is the inner back lining of the eye.

In the past, there was a concern about cataract surgery causing progression of AMD. It was thought that there was an inflammatory component to AMD and the normal inflammatory response after cataract surgery may lead to AMD progression.

But studies have looked at patients who underwent cataract surgery compared to patients who didn't have cataract surgery and the progression of AMD was not significantly different between the two groups. However, those patients with AMD who underwent cataract surgery had a significant improvement in vision.

[…]

2020-02-18T05:00:00+00:00February 18th, 2020|Blog|

What’s that lump on my eyelid?

So you’re going about your day and notice a slight twinge when you blink. It starts off as a mild awareness then proceeds to a painful feeling with every blink. You look in the mirror to see what could be causing it, and there you see a small red bump forming.

You decide to wait to see what happens and one of three things occurs. Either it gets bigger, redder, and more painful; it gets smaller and goes away; or it stays put and is no longer painful or growing in size. Let’s dive into one of the most common eye conditions we treat: hordeola (commonly known as “styes”) and chalazia.

Hordeola (or singular hordeolum), are infectious abscesses of the glands that line the eyelids. Bacteria that are naturally occurring on the eyelids and eyelashes can make their way into the gland and form what is essentially a pimple in the eyelid. If it goes untreated, hordeola can (rarely) lead to spreading of the infection throughout the eyelid (preseptal cellulitis) or even start to invade the […]

2020-02-11T05:00:00+00:00February 11th, 2020|Blog|

What Everyone Should Know About Macular Degeneration

Age-related macular degeneration, often called ARMD or AMD, is the leading cause of vision loss among Americans 65 and older.

AMD causes damage to the macula, which is the central portion of the retina responsible for sharp central vision. AMD doesn't lead to complete blindness because peripheral vision is still intact, but the loss of central vision can interfere with simple everyday activities such as reading and driving, and it can be very debilitating.

Types of Macular Degeneration

There are two types of macular degeneration: Dry AMD and Wet AMD.

Dry (non-exudative) macular degeneration constitutes approximately 85-90% of all cases of AMD. Dry AMD results from thinning of the macula or the deposition of yellow pigment known as drusen in the macula. There may be gradual loss of central vision with dry AMD, but it is usually not as severe as wet AMD vision loss. However, dry AMD can slowly progress to late-stage geographic atrophy, which can cause severe vision loss.

Wet (exudative) macular degeneration makes up the remaining 10-15% of cases. Exudative or neovascular refers […]

2020-02-04T05:00:00+00:00February 4th, 2020|Blog|

Eye Color and You

Remember back to the last time you experienced the birth of a baby. What was one of the most common questions people asked? Most likely, "WHAT COLOR ARE HIS EYES?,” was right up there.

What makes the color of our eyes appear as they do? What role do genetics play? What if you don’t like your eye color–can you change it? Are there any medications that can change the eye color? Get ready to explore the science behind eye color by starting at the beginning…….

Baby’s eye color can change. A baby can start out with blue eyes, for example, that change to brown as she ages. It’s all dependent on a brown pigment called melanin which develops as a child grows. The more melanin present, the darker the eye color. Brown eyes have the most pigment saturation, green/hazel eyes have less melanin, and blue eyes have the least pigment. The color of eyes is dependent upon genetics. Genetics are complicated, but generally speaking brown trumps blue if there is a brown-eyed parent. This is because […]

2020-01-28T05:00:00+00:00January 28th, 2020|Blog|

What is Minimally Invasive Glaucoma Surgery?

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 on glaucoma show that if you can reduce the pressure in glaucoma the progression of the disease slows.

The problem with trabeculectomy is 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 […]

2020-01-21T05:00:00+00:00January 21st, 2020|Blog|

10 Fun and Fascinating Eye Facts

1. Vision is so important to humans that almost half of your brain’s capacity is dedicated to visual perception.

2. The most active muscles in your body are the muscles that move your eyes.

3. The surface tissue of your cornea (the epithelium) is one of the quickest-healing tissues in your body. The entire corneal surface can turn over every 7 days.

4. Your eyes can get sunburned. It is called photokeratitis and it can make the corneal epithelium slough off just like your skin peels after a sunburn.

5. Ommatophobia is the fear of eyes.

6. You blink on average about 15 to 20 times per minute. That blink rate may decrease by 50% when you are doing a visually demanding task like reading or working on a computer – and that’s one reason those tasks can lead to more dry-eye symptoms.

7. Your retinas see the world upside down, but your brain flips the image around for you.

8. If you are farsighted (hyperopia) your eye is short, and if you are shortsighted (myopia) […]

2020-01-14T05:00:00+00:00January 14th, 2020|Blog|