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August 2011 
     Cochrane:  403-851-2020                                                 Crowfoot:  403-286-0888
in this issue
:: Specialization - our eyes do it, too
:: New eyeglass lens shown to reduce myopia progression
:: Back to School? Get your eyes checked first
:: Can you "see" with your tongue?

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Specialization - our eyes do it too

Night sky 

 

 

Earlier this month in Southern Alberta we were treated to clear skies and an impressive astronomical display known as the Perseid meteor shower. If you stayed up late to try and catch a few shooting stars, you may have noticed that very faint points of light coming from some stars seem to disappear when you look right at them, then reappear when you look just off to the side. No, there's nothing wrong with your eyes. It has to do with the way our eyes are set up to see at night.

 

You've probably heard of "rods" and "cones" . These are the specialized cells inside the eye that are designed to receive light and convert it to an electrical signal. This signal is then relayed to the brain where it is interpreted as an image. The cones are used mainly for sharp detailed vision and for colour vision. They are activated in well-lit conditions and therefore are mostly used during the daytime. The rods are used mainly for peripheral vision and dimly-lit environments - they are the most light sensitive. It's the location of the rods and cones in our eyes that's the key factor here: our sharp, central vision is full of cones with almost no rods.  That's why we need to look slightly to the side in order to see very faint or dimly lit objects.

 

Try this the next time you are gazing up at the night sky!

 

 

Request an appointment to get your eye health and vision checked

  

 
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New eyeglass lens shown to reduce progression of nearsightedness in children Zeiss MyoVision

  

Nearsightedness, also referred to as myopia, causes blurring of objects at a distance. It affects over 1.45 billion people globally.  When diagnosed during childhood years it can progress quickly, leading to dependence on glasses or contact lenses for most visual activities.  A family history of myopia (at least one parent) increases the risk of having progressive myopia.

 

There has not been any way to alter the increase of myopia, until recently.  A new spectacle lens from Zeiss called MyoVision has been developed ...

Read on... 

Time to get your eyes checked?  Request an appointment online and take a proactive step towards healthy eyes and clear vision. 

 

  

 

 

 

 

 

 

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Back to School?  Get your eyes checked first

 

 

Back to school eye care

  

  

 

During this Back To School season, don't forget to bring your kids in for their annual eye exam to make sure they are set up well for the school year.  80% of learning is visual, and many problems with vision can go undetected in children.  Back to school eye care also applies to your high school and college-age kids - their contact lenses and eyeglasses should be up to date for them to be able to meet the increased visual demands of classroom and computer work.

"Won't my child complain about their eyes if they have a vision problem?"

Not necessarily.  Children, teens and even young adults are used to the way they see - for them their vision is normal.  Many eye and vision problems can go undetected without an evaluation by an optometrist.  Knowing that your son or daughter can spot things on the side of the road before others can actually doesn't tell us very much about how well his or her vision system is operating as a whole under a variety of conditions.

"What kinds of symptoms might indicate a vision problem?"

Inattention while reading or in class, frequently losing place while on the computer or while reading, rubbing eyes or squinting, or headaches may all be signs of an uncorrected vision problem.

Don't forget about eye health - we perform a complete ocular health assessment from front to back at every eye exam.  We will also check focusing and binocular vision (the ability for the eyes to work together).  Many factors may influence one's visual performance in a school setting.   

 

Request an appointment online for a complete ocular health check and vision examination to make sure everyone in the family is ready for another school year. 

 

 

 

 

 

 

 

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Can you "see" with your tongue?  

 

Is it possible to "see" using another part of the body?  Researchers at the University of Wisconsin say yes.  They've been developing a way to help the visually disabled learn to use their tongues as a way of replacing their lost sense of vision. 

 

Paul Bach-y-Rita is the neuroscientist who invented the specialized gear, which consists of a video camera that converts a recorded image to an electric signal on a plastic strip.  The strip is placed on the tongue.  What the camera "sees" is then transmitted to the user of the device via a tingling sensation.  The tongue essentially replaces the eyes as the new organ that "sees" for the brain.

 

The brain is actually what does the seeing, says Bach-y-Rita.  The eyes are simply receptors that relay information to the brain.  The brain then interprets the signal to provide us with what we understand as vision.  Because the brain is so adaptable, we can learn to use another part of our body and fill a similar role as what our eyes are normally used to doing for us.  This could help the visually disabled navigate through a twisted hallway, step over an object in the way or even localize another object moving towards them.

 

This new technology involving plasticity of the brain is being studied more and more in neuroscience and may have other applications in health.  You can read more about this by clicking here.

 

  

 

  

Request an appointment online for a complete ocular health check before renewing your prescription. 

 

 

 

 

 

 

Thank you for seeing us regularly for all your eye care needs.  We look forward to your next visit.

Sincerely,


Dr. Michele Naruszewicz
Dr. Tom Wilk
Dr. Sallie Barclay
Dr. Christie Kim
Dr. Brent Hopfauf

Mountain View Optometry

 

600 Crowfoot Crescent NW     Calgary, AB                PHONE:  403-286-0888 
404 First Street. W                    Cochrane, AB            PHONE:  403-851-2020