Posts Tagged ‘cataract’

Dilated Eye Exams Increase Quality of Life for Seniors

Wednesday, January 11th, 2012

human eye 300x137 Dilated Eye Exams Increase Quality of Life for SeniorsA recent study showed that dilated eye exams were a low-cost method of increasing quality of life for seniors.   The study revealed that, in patients with no previously diagnosed eye problems, a dilated eye exam increased the quality of life of the individual 7 x more than just a simple check of the vision chart at the primary care doctor’s office.

In fact, the U.S. Preventative Services Task Force recently withdrew their support for simple vision chart screenings with a primary care doctor as a meaningful way to increase a person’s quality of life.

Why?  A simple vision chart test may not accurately reflect a person’s ability to see clearly and effectively in all situations.   But, even more importantly, it fails to assess many ocular conditions which threaten a person’s quality of life.     Just a few of these conditions are glaucoma, cataracts, macular degeneration, and diabetic retinopathy.     A dilated eye examination with an eye care provider could identify many other eye conditions and even signs of systemic diseases that may have gone unnoticed during regular physicals with the primary care physician.

I cannot stress enough how important the annual comprehensive eye exam is to a person’s vision, long-term ocular health, their overall health, and (as this study shows) quality of life.

As always, we’d love to hear your questions or comments.   Give us a shout over on our facebook page!

Best wishes,

Dr. Beach.

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Does less blue light = More problems sleeping?

Sunday, October 30th, 2011

If a specific  type of light is transmitted less than normally to a person’s retina, does it increase the likelihood of sleep disturbances?    Researchers in Denmark, who published their results in a recent journal, may have provided an answer.    The spectrum 300x206 Does less blue light = More problems sleeping?researchers found that the chance of sleep trouble or sleep disturbances increased significantly when less blue light was transmitted to a person’s retina.

But how is this significant?   Are we subject to conditions of less blue light?   Yes!   In fact, as we age, the retina receives less blue light due to the yellowing of the crystalline lens inside the eye.    As this lens ages and yellows it slowly creates a filtering effect that reduces the transmission of blue light to the retina.    Unfortunately, this blue light may play an important role in how retinal nerve cells communicate to the hypothalamus for the purpose of creating sleep patterns.

The researchers suggest that this may help explain why some individuals are more likely to have trouble sleeping as they age.    The research also suggests blue-light therapy may be an avenue of further discovery for treating certain sleep conditions.

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Summertime: Let’s Talk About Ultraviolet Light and Your Eyes

Thursday, June 2nd, 2011

Summer is definitely here.   The ocean front is packed.  High temperatures are routinely in the 90′s.   Vacations are being planned.   But this is also an important time to talk about the risks of ultraviolet (UV) light.3488404393 94065243c01 300x225 Summertime:  Lets Talk About Ultraviolet Light and Your Eyes

Certainly, we are all aware of the importance of putting on sunblock to reduce the risks of skin cancer caused by UV light.   But, did you know your eyes are susceptible to damage from UV as well?

Studies have shown UV light to be associated with increased cataracts and macular degeneration.    Also, UV light can cause changes to the appearance of the front surface of the eye  (check out our previous blog post on ‘yellow spots’ ).    And similar to the rest of your skin,  UV light can cause cancerous formations around the surface of the eye.

How can you protect your eyes against UV light?  The best way is sunglasses, but the key is they have to be “UV-filtering” sunglasses.    The typical drugstore-type sunglasses may not have the ability to block UV light.  Or, they may not block significant amounts of UV-A, UV-B, or both.

However, prescription sunglasses have to meet higher standards.  In fact, prescription UV-blocking lenses block up to 99% of UV light and provide the best means to protect your eyes against the harmful effects of the sun.   (Be sure to check out our previous blog post on polarized sunglasses)

So, before you hit the beach this summer, make sure to pack your sunblock and your UV-blocking sunglasses.   Your skin and your eyes will thank you later!

As always, we’d love to hear from you.   Please feel free to leave a comment/question here or on our facebook fan page.

Happy Summer,

Dr. Beach.

 

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Ask Dr. Beach: Does Eye Color Affect Vision or Eye Health?

Monday, November 29th, 2010

An interesting fact is that iris color is actually the result of the amount or density of pigment cells in the iris.   Pigment cells, called melanocytes, produce the pigment known as melanin.    The amount and density of the human eye 300x137 Ask Dr. Beach:  Does Eye Color Affect Vision or Eye Health?melanin determines what colors of light are absorbed and what is reflected.   In essence, the higher the concentration of melanin in the iris, the darker the iris color.   But how does this affect vision or eye health?

The color of the iris does not affect visual acuity or the sharpness of a person’s vision.  But, the amount of pigment can affect visual “comfort” in certain situations.   For example, people with blue or light-green eyes may be more sensitive or experience more visual discomfort in bright sunny conditions than people with brown-colored eyes.    This is because the higher concentration of melanocytes in the darker iris acts as a internal-sun shade of sorts.    Light-colored eyes don’t have such a luxury.   While everybody should have a quality pair of sunglasses, this becomes almost a requirement for those with light-colored eyes in order to increase visual comfort in sunny conditions.

Iris Colors 150x150 Ask Dr. Beach:  Does Eye Color Affect Vision or Eye Health?The same type of action may explain how light colored irises may be associated with higher risks for certain eye problems.   Since there is less of a filtering effect in the light-colored iris, more harmful UV light will pass through the iris and this may increase risks for cataracts and macular degeneration.   Some studies have shown a higher incidence of these ocular conditions in patients with lighter-colored irises.    Of course, this doesn’t mean that everyone with blue-colored eyes will get macular degeneration and early-onset cataracts, but it is something to consider in terms of increased risk factors.    Yet, wearing sunglasses with UV-blocking lenses can reduce these risk factors and help all eyes stay healthy over the long haul.

As always, I’d love to hear your comments or questions.  Give us a shout over on Facebook or on Google+.    And, remember, you can now request an appointment for your annual eye exam  at our office by clicking here.

Best wishes,

Dr. Beach.

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Facebook Fan Submitted Topic # 5: What causes cataracts?

Wednesday, May 26th, 2010

We asked for suggestions from our Facebook fans for blog posts and we got some great responses.   This is the fifth of  5 posts on Dr.  Beach’s blog  to be based on these topics/questions.

Michael, a CEC Facebook fan, asks:    “What causes cataracts because I know my grandparent had it.”

Hey Michael.   Cataracts are the number one cause of reversible blindness in the world, so it’s a pretty important topic.   I say reversible blindness, because cataract surgery is used to remove the cataract to restore vision, which I’ll touch on in a minute.

Before we get into what causes a cataract, it’s important to answer the question,  “What is a cataract?”   A cataract is a cloudiness that occurs within the crystalline lens inside the eye.   The crystalline eye 300x213 Facebook Fan Submitted Topic # 5:  What causes cataracts?lens is made entirely of proteins.  It’s the arrangement of these proteins during embryonic development that gives the lens its clarity and focusing properties.   Over time, these proteins may start to clump together or alter their arrangement.   Once that arrangement of proteins changes, clarity is lost and haziness develops within the crystalline lens.  The result is cloudy vision, almost like looking out a foggy windshield.   There are different types of cataracts based on where within the lens they develop.

So, what causes cataracts?    The number one cause is age.   As the lens ages, the proteins start to change and the lens becomes cloudy.  There is no specific age for cataract development.   In the clinic, I have seen age-related cataracts develop in patients in their 50′s and I’ve seen other patients in their 80′s with hardly any signs of cataracts.

Another factor in cataract development may be UV light exposure (sun bathing without sunglasses).   Also, nutrition and diet may influence cataracts and much discussion is being made regarding anti-oxidants in the prevention of cataract progression.   Trauma is yet another cause of cataract development.   Certain medications, such as oral prednisone or other corticosteroids, can cause cataracts.    Medical conditions, especially diabetes, can result in an earlier onset of cataracts as well.

While there have been false claims that certain eye drops can be  used to treat cataracts, the only cure is cataract surgery.   This outpatient procedure has seen great advances in recent years  in it’s efficiency, reduction of potential complications, and final vision results.   In essence, the cataract surgeon makes a small incision on the front surface of the eye, removes the natural crystalline lens containing the cataract, and a customized lens implant is put back in place.

Michael, thanks for the question.    It’s been a lot of fun answering questions from our Facebook fans these past two weeks.   It’s great to see such an interest in eye care!

Dr. Beach.

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Medication Side Effects Review: Amiodarone

Monday, March 1st, 2010

Amiodarone Medications Review Logo 300x130 Medication Side Effects Review:  Amiodarone

Last week, a patient requested that I bring up this medication for my next ‘Medications Review.’  Amiodarone is given to treat cardiac arrhythmia, often when other medications have proved ineffective in controlling the condition.

Patients taking amiodarone are advised to have annual, and sometimes more frequent eye exams, because of several side effects the medication may have on the eyes.

For example, amiodarone may cause “vortex keratopathy.”   This side effect is secorverticillatab 300x226 Medication Side Effects Review:  Amiodaroneen as a swirling pattern of white deposits in the cornea.   This finding may or may not effect vision, and has been shown to resolve when the medication is stopped.

Another potential side effect is cataracts, which may cause a blurriness in vision as well as glare or halo effects when looking at lights.

Some patients taking amiodarone also experience changes in their perception of color.    This may be the result of the drug’s effect on the optic nerve.

Frequent eye examinations will allow your optometrist to diagnose these side effects and communicate with your primary care physician.   From there, the severity of the ocular side effects can be weighed against the cardiac benefits of taking amiodarone.    If you are someone you know is taking amiodarone for arrhythmia, please see your optometrist and let them know you are taking this medication.

As always, I’d love to hear your comments or questions.  Give us a shout over on Facebook or on Google+.    And, remember, you can now request an appointment for your annual eye exam  at our office by clicking here.

Best wishes,

Dr. Beach.

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Medication Side Effects Review: Steroids

Tuesday, January 26th, 2010

Steroids (Corticosteroids)

Medications Review Logo 300x130 Medication Side Effects Review:  Steroids

Ever wonder why an optometrist wants you to list all of your medications?  Ever wonder what a medicine for arthritis, lupus, or any other condition has to do with a comprehensive eye health exam?

In this series of blog entries I’ll be talking about potential ocular side effects of  common medicines that are used to treat diseases throughout the body.  In fact, most common systemic medications have the potential to affect your eyes.    The incidence and degree of ocular side effects depends on the medicine, but letting the optometrist know your medications list will allow for special attention to  specific potential side effects during your  exam.

First up:  Steroids.    We’re not talking body-building,  Mark McGuire steroids.  Those are anabolic steroids.  We are talking corticosteroids.   This group of oral medications help control over-active responses from your immune system during a whole host of conditions.  Examples of conditions in which corticosteroids may be used include arthritis, lupus, dermatitis, severe allergies, Crohn’s disease, hepatitis, sarcoidosis, and many other conditions.   Two of the most common corticosteroids used are Prednisone and Dexamethosone.

Corticosteroids are one of the groups of oral medicines most likely to have ocular side effects.  Long term use of these medicines may lead to cataracts.    Steroid-induced cataract formation varies in its incidence and severity based on the individual and the dose and duration of the steroid use.   Eye exams, with pupil dilation, are indicated at regular intervals during long-term steroid use.  This way the optometrist can notify the primary care physician of this side effect.    If the cataracts become severe, cataract surgery may be indicated.

Another potential side effect of oral corticosteroids is an increase in eye pressure.  This increase in eye pressure has the potential to develop into glaucoma, which is an irreversible damage to the optic nerve resulting in permanent vision loss.   Again, regular examinations by the optometrist during the use of these medicines will allow for close monitoring of eye pressures. When pressure changes are caught early and treated with topical pressure lowering eye drops,  glaucoma may be prevented from occurring.

As always, if you have any questions, please feel free to email me at doctor@clearvieweye.net

Take Care,

Dr. Beach.

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