What is exactly is your cornea?

Image of cornea

Have you ever heard the term “cornea” and weren’t sure what it meant? The cornea is the clear tissue on the very front of your eye. Contact lenses are placed directly onto the cornea. Over-wearing contact lenses can cause changes to the cornea. Some changes such as new blood vessels, scarring, and infections can be seen during routine examination. Some changes occur on the cellular level and can only be seen with a specular microscope. Having annual eye exams ensures that your corneas stay healthy.

Find proper contact lens insertion and removal tips here!

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

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*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

What you got there is a Corneal Guttata!

Corneal guttata are the most common primary corneal endotheliopathy and are present in 70% of the population over 40.  They are secretions of collagen from the endothelial cells that form a nodule on the back surface of the cornea.  The secretions occur when cells under stress secrete an abnormal membrane material.  When they are small and low in number a patient is assymptomatic, but as they become numerous and larger in size they disrupt the normal corneal function and result in decreased vision.  As the guttata coalese and the cornea becomes swollen, the condition is known a Fuch’s Endothelial Dystrophy.  As Fuch’s progresses it may lead to persistent corneal edema.  In early stages edema may be managed with medications but as it progresses a corneal transplant may be necessary.  Tools such as a specular microscope allow us to monitor and treat patients more effectively and in a timely manner.  A specular microscope screening may be present as part of comprehensive eye exam in certain offices.  This is another reason to maintain yearly eye exams, even in the absence of visual complaints

 

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

Will eating carrots really improve my vision?

Carrots contain a high level of beta carotene which the body converts to Vitamin A.  Our eyes depend on certain amounts of Vitamin A to maintain the health of the eyes surface as well as the proper function of the eyes retina.  Excessive amounts of Vitamin A will not increase the eyes function but too little Vitamin A can be detrimental to our vision.  Vitamin A deficiency is the leading cause of blindness in third world countries where malnutrition often leads to dehydrated corneas and retinal eye disease.  Proper diet can have a significant impact on our vision.  Eating a health balance of fruits, vegetables, fish, and nuts will provide the nutrients needed for our eyes to work to their best ability.

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

Downtown – 614-224-2414 West – 614-878-7771

East – 614-861-7771 Westerville – 614-890-3577

Dublin – 614-978-9940

Why is it important to monitor the corneal endothelial cells?

Many people have asked me recently why it is important to monitor the corneal endothelial cells with a specular microscope, so I thought it would be a good topic to address.  The corneal endothelial cells have many important functions.  The most important are that they form a tight barrier to keep fluid from crossing from the aqueous (fluid in the front chamber of the eye) into the cornea and they pump excess fluid from the cornea.  This is important in allowing someone to see clearly because excess fluid can cause hazy or fluctuating vision.  Endothelial cells do not regenerate and due to the normal aging process the central cornea can lose 100 to 500 cells per year.   This number may be increased due to disease processes, contact lens overwear, surgery or trauma.   As these cells die they fall off into the anterior chamber of the eye and the remaining cells must change to accommodate the gap.  They do this by stretching or sliding into the empty position to fill the missing gap.  As they do this they change shape which is normal to a certain level, but when pushed to extremes can result in a breakdown of the cornea’s normal functions.   The specular microscope allows us to assess the health of the cells with pictures and also a numerical analysis so we may make appropriate changes to protect someone’s cornea.

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

Downtown – 614-224-2414 West – 614-878-7771

East – 614-861-7771 Westerville – 614-890-3577

Dublin – 614-978-9940

Summerlike Weather – Watch those Corneas!

With the summerlike weather we have been having, one need to be diligent in wearing their sunglasses. One particular reason for this is pterygium. This is a growth of tissue that starts covering over the cornea. It is seen
primarily in people who are exposed to high UV levels. If the tissue grows far enough across the cornea, it can block vision and cause blindness. The tissue can be removed surgically, but often scars afterward and can return.
The best treatment is prevention, by blocking UV rays with sunglasses.

 

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

Downtown – 614-224-2414 West – 614-878-7771

East – 614-861-7771 Westerville – 614-890-3577

Dublin – 614-978-9940

Pachymetry – Very Cool Stuff!

The optometrist will often have a patient return to the office for a special test called pachymety. This instrument using ultrasound technology will determine the central cornea thickness. This measurement is important in evaluating the intraocular pressure (IOP) for a patient who may be a glaucoma suspect. A thicker cornea results in an IOP reading for a patient that is higher than the actual pressure reading, whereas a thinner cornea will have an IOP reading lower than actual. A correction or adjustment is then applied to the IOP measurement to give the optometrist a more true reading. Pachymetry has other clinical uses involving the cornea. The thickness measurement is needed to determine if a patient is a suitable candidate for laser refractive correction or surgery. It also has a role in measuring corneal swelling from contact lens wear or from corneal disease.

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

Downtown – 614-224-2414 West – 614-878-7771

East – 614-861-7771 Westerville – 614-890-3577

Dublin – 614-978-9940

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor.

Pterygium

A pterygium is often confused with a pinguecula. However, it is quite different as if actually invades the cornea by crossing over the limbus area. Causing scarring. It is raised and wedge shaped. Usually, a pterygium contains blood vessels. If inflamed, it is usually treated with steroid eye drops and artificial tears. If the pterygium grows too much towards the pupil, it can affect sight. At this point, a surgeon will try to redirect the path of growth to save the individual’s vision. As with a pinguecula, sunlight exposure is the cause of this.

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg.

www.rinkoveyecare.com

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor.