The Eye -Facts You May Not Know
Anatomy of the Human Eye
The eye is an amazing part of the body and in addition to vision; there are many things an ophthalmologist and retinal specialist can detect through a simple examination. Even if you have 20-20 vision a check-up for eyes is a smart move. Quite often an eye doctor might be the first to detect a serious health problem that is unrelated to vision.
Eyes are about 1” in diameter and there are actually pads of fat along with bone that protect your eyes. The eye works very much like a camera. Basically there are three layers: the sclera, the choroid layer and the retina.
A simplified definition of how the eye works is: light enters the cornea, the pupil and lens before it is projected onto the retina. Electrical impulses are transformed by the retina via ganglion neurons, which is the optic nerve that transmits signals to the brain.
Parts of the Eye
Diseases Detected in an Eye Exam
There are arteries and veins in the eye which are examined during a routine eye exam which might reveal diabetes or high blood pressure. Approximately 65% of the time an eye doctor can detect high cholesterol before your family doctor confirms this with a blood test. This condition will show up as yellowish plaque in the retinal blood vessels.
At least 20% of the people with high blood pressure don’t know they have this disease as there are no symptoms. The arterial blood vessels in the eye of people with hypertension have a silver or copper hue. Left untreated, hypertension caused the blood vessels throughout the body to harden, which will increase the risk of a heart attack or stroke.
High cholesterol, tumors, cancer and thyroid disease may also be noted during an eye exam.
As for diabetes, the elevated blood sugar will damage the blood vessels over time and can eventually lead to blindness. The eye doctor can detect seepage or new, abnormal blood vessels which grow to replace the affected ones. This is a big indicator of abnormally high blood sugar.
Eye - Healthy
Effect of Allergies on Your Eyes
Allergies can certainly affect the eyes as many of us are aware. Allergies can lead to swollen ocular surface blood vessels with symptoms include red watery eyes, swelling and itchy eyes. Your eyes are actually secreting anti-inflammatory histamines and other natural chemicals. Anti-histamines and eye drops are used as treatment, but if your reaction is severe seeing an eye doctor is the best choice.
Allergy Effect on Eyes
Eyes are the Window to the Soul
While it is commonly believed that this verse is in the Bible, the only one I found was in Mark 7-20-23 and it said "The eyes are likened to the windows of the heart", which I think is true. We can learn a lot about another person by looking into their eyes and the way they respond to various situations.
Eyes Are the Window to the Soul
Eyes are the windows to the soul
Throughout my life I’ve been told
To see into anothers heart
Eyes are the place to start
Be they hazel, green or blue
Black, brown color changing too
Matters not what color they be
They show what one needs to see
Through these windows the truth lies
Emotionally nothing hides
Clear for all too recognize
Displayed to the world in ones eyes
Evident are anger, lust and surprise
Fear, truth, lust, hope and despise
Happiness, sorrow, and confusion
Inside familiar eyes there is no illusion
To gaze deeply is an intense moment
For the eyes are an intimate component
Although prominent noticed by all
Often the feature hardest to recall
Written by Vern Eaker
Autoimmune diseases can also attack the health cells and tissues of the eye through inflammation. The doctor looks for inflammation inside the swollen ocular surface blood of the eye.
If an autoimmune disease is present they will find 30-50% of the vessels to be inflamed and they are red, watery and itchy. These finding would indicate the patient should see a rheumatologist to test for autoimmune diseases. One autoimmune disease, called Sjogrens Disease, causes dry eyes, which can be treated with Restasis, eye drops and ointments before bed.
Stress Causing Eye Disease?
Excessive mental or emotional stress can cause a condition called Central Serous Retinopathy (CSR), which causes blisters inside the eyeball. The body is taxed to the degree that the retina starts to leak fluid which forms blisters.
This was typically found in men with “Type A personalities”, but is being diagnosed in women more frequently now. The symptoms are blurred vision, or seeing wavy lines when attempting to focus. Decreasing the individual’s stress level is the best cure, but some are being treated vie eye surgery with lasers
Cancer in the Eyeball
It is possible to get cancer in your eyeball. Sometimes a small growth called a nevus will be found by the ophthalmologist. This is a common benign growth, quite like a mole on your skin. While they usually remain harmless they are watched closely because they can develop into an ocular melanoma (cancer of the eye).
Vitamins for the Eyes
There are some vitamins that are especially good for your eyes. Lutein is helpful to prevent macular degeneration, which is a common condition of the elderly. Omega-3 provides essential fatty acids which help keep you eyes and heart healthy. Flaxseed oil and fish oil is good for dry eyes.
Vitamin A and Beta Carotene are excellent also and deficiency of these vitamins can cause blindness. Also, Vitamin C, Bioflavonoid, Vitamin E and zinc may reduce the risk of cataracts also.
There are numerous eye conditions which are not covered in this hub. What is amazing is how many other diseases can be detected during a routine eye examination. If you have burning eyes, swollen eyes, yellow in the whites of your eyes, see floaters, have symptoms of an eye infection or any discomfort in your eyes, and please see your physician or eye doctor.
Eye Problems and Eye Exams
Have you had an eye examination in the past year?
The copyright, renewed in 2018, for this article is owned by Pamela Oglesby. Permission to republish this article in print or online must be granted by the author in writing.