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Eye Anatomy – Part 3: The Retina & Optic Nerve

Posted on by Angela Walsh in blog Comments Off on Eye Anatomy – Part 3: The Retina & Optic Nerve

Welcome to Part 3 of our Eye Anatomy blog series! In this post we are going to talk about the Retina and the Optic Nerve.

The Retina:

The retina is a very important part of sight that senses the light that comes into your eyes. It is made up of many cells, one of which is called a photoreceptor. The center of the retina, which is called the macula, is the most sensitive part of your vision, because it has millions of tightly packed photoreceptors in a small area. This densely packed are of photoreceptors makes visual images detailed, just as higher counts of megapixels in a digital camera allow for HD images.

 

Some common eye conditions and diseases related to the Retina are:

 

The Optic Nerve:

The optic nerve is the nerve that connects your eye to your brain. It carries the signals that are given off by light hitting the retina. It is made up of more than 1 million never fibers. The optic nerve can be damaged in diseases like glaucoma, which is believed to be caused by high eye pressures.

 

Please let us know if you have questions or comments regarding this post.  We care about you and your eyes!  Until next time!

 

 


Eye Anatomy – Part 2: The Lens & Vitreous

Posted on by Angela Walsh in blog Comments Off on Eye Anatomy – Part 2: The Lens & Vitreous

Welcome to Part 2 of our Eye Anatomy blog series! In this post we are going to talk about the Lens and Vitreous.

The Lens:

The lens sits behind the colored part of your eye and helps focus light on the retina in the back of your eye. It can change shape to allow us to see at different distances. This works really well when we are young, but we lose the ability to do this as we age because the lens becomes hardened. When the lens becomes hard enough that it becomes difficult to see through, we call it a cataract.

Some common eye conditions and diseases related to the Lens are:

 

 

The Vitreous:

The vitreous is the jelly in the back of the eye that fills the space between the lens and the retina. As we age this jelly can start to liquefy and collapse in on itself. When the jelly collapses in on itself microscopic fibers within the vitreous tend to clump and cast shadows on the retina, which end up causing floaters in your vision.  Floaters are very common.  Almost everyone experiences them at one time or another. They become more frequent as we age.

 

Vitreous Detachment

Floaters

 

There is no way to eliminate the floater through surgery, laser treatment or medication. With time, the floater will become less noticeable as the brain adjusts to its presence and can “tune out” the floater. The floater will always be somewhat observable and present, particularly if one eye is covered and the patient looks at a light-colored background.

Anyone with the sudden onset of a new floater should be examined promptly by an ophthalmologist. The ophthalmologist will perform a dilated exam and look at the vitreous and retina with specialized equipment. Sudden floaters could be a symptom of vitreous detachment, which is a benign condition that carries the risk of developing into a retinal tear and/or retinal detachment.

Please let us know if you have questions or comments regarding this post.  We care about you and your eyes!  Until next time!

 

 


Eye Anatomy – Part 1: The Cornea & Iris

Posted on by Angela Walsh in blog Comments Off on Eye Anatomy – Part 1: The Cornea & Iris

My name is Dr. Naina Gupta and I am one of the newest members of the SureVision team.  Patient education is a very important aspect of what we do here at SureVision.  We believe that understanding the different parts of your eyes and how they contribute to your vision can empower patients and promote better eye health.  Over the next couple of weeks I”ll be posting a 3 part series of blog posts covering the eye anatomy. In this post we are going to talk about the Cornea and the Iris.

The Cornea:

The cornea is a clear, curved cap on the front part of your eye. It is important in protecting your eye, but also the curve of the cornea acts like a lens, focusing light on the retina in the back of the eye.

Some common eye conditions and diseases related to the Cornea are:

The Iris:

The iris is the circular part of the eye that provides the color to our eyes. It is the part that makes your eye blue, brown, green or hazel. It surrounds the pupil, which is just empty space that allows light to pass. The iris controls the amount of light that enters your eye by changing size. For example, when you are in a bright environment your iris will stretch out, causing the pupil to shrink, or constrict, and limit the light that passes. When the environment is dark, your iris with shrink, causing the pupil to enlarge, or dilate, allowing more light to pass.

 

“There are many conditions that can involve the iris. Inflammation of the iris is called iritis. This is often seen with inflammation of other parts of the eye as well. There are also many conditions that impact the pupil size, some of which can be life threatening. Therefore, unequal pupils should always prompt a thorough exam. Conditions that can cause an asymmetric pupil include a Horner’s syndrome, Adie’s tonic pupil, a palsy of cranial nerve, medications (including anti-nausea patches) and mechanical anisocoria. Again, an asymmetric pupil should be thoroughly checked out by a physician, to rule out any life threatening issues.”

Please let us know if you have questions or comments regarding this post.  We care about you and your eyes!  Until next time!