Tag Archives: Lens

Video – Description of Cataracts. What Are Cataracts?

Cataract Description

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The above video is from EyeMaginations and gives a great description of what Cataracts are:

Cataracts are a normal and common part of the aging process but, they do not have to interfere with your lifestyle.   A cataract is a cloudiness of the crystalline lens inside of your eye.  As your lens gets cloudier, your vision will gradually become more blurred.

The human eye may best be compared to a camera.  When you take a picture, the lens in the front of the camera allows light through and then focuses that light on the film in the back of the camera.  When the light hits the film, a picture is taken.  The eye works in much the same way.

In  youth, the crystalline lens of your eye is clear and allows light to pass through.   Light is focused by your cornea and your crystalline lens onto a thin layer of nerve tissue in the back of your eye called – the retina.   Your retina works like the film in a camera.  When the focused light hits the retina – a “picture” is taken and sent to your brain.

While a dirty camera lens blurs a picture, any significant cataract or cloudiness  in your crystalline lens will blur the images that you see.

When a cataract becomes significant – your vision can become quite blurry.  It is suggested if your vision drops below 20/40 or so….then it is common to be told to see an eye surgeon to have cataract surgery.

This surgery involves taking out the cloudy crystalline lens (cataract) and replacing it with a clear implant.  Often your surgeon can even do a calculation that can place your current eyeglass prescription into the lens implant.  The result after the cataract surgery can be much clearer vision and often there is no need for glasses after the surgery!

For more information – see your local Optometrist or  Dr Dawn Bearden or Dr Anna-Kay Tenn in Pembroke Pines 954-430-3808 or Sunrise 954-851-9949 for your yearly eye exam and they will be happy to discuss cataracts and cataract surgery options with you!

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Video – What Is Astigmatism? What Causes Astigmatism?

Video - What Causes Astigmatism?

Video - What Causes Astigmatism?

Click the video above to learn what is the cause of Astigmatism. It is most commonly caused when the shape of front surface of your eye (called the cornea) is not perfectly round (like a baseball)  but, it is more oblong shaped (like a football).  When this oblong shape is located on the cornea then it is called “Corneal Astigmatism”.  Less often, the lens inside your eye (located right behind the colored part of your eye called the iris) can also be oblong shaped.  This is called “Lenticular Astigmatism”.

Most commonly, people are born with this oblong shape to their eyes and often it can become a bit worse as time goes on.  More rarely – astigmatism can be induced by a trauma to the eye.

Astigmatism causes a blur and distortion to your vision – for both distance and near objects.  The higher the amount of astigmatism – the worse the blur and distortion will be. Astigmatism can be corrected with a variety of options – glasses, contact lenses (called toric or astigmatic contacts) and laser vision surgery.

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Diagram of Your Eye

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PLACE YOUR MOUSE OVER THE MAGNIFYING GLASS
AND USE IT TO MOVE THE MAGIFIER OVER
EACH PART OF THE EYE

Vodpod videos no longer available.

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