The Eye Zone Services

If you’ve had a vision screening recently, you might say, “My vision is fine! I don’t need a comprehensive eye exam.”

But a vision screening provides a limited perspective on the overall health of your eyes. It’s a bit like getting your blood pressure checked and not getting the rest of your annual physical. You’ll have useful information, but it’s not the whole picture.
 

What are the Limitations of a Vision Screening?

Vision screenings only test your ability to see clearly in the distance. This is called visual acuity and is just one factor in your overall vision. Others include color vision, peripheral vision, and depth perception. The screening also doesn’t evaluate how well the eyes focus up close or work together. Most importantly, it doesn’t give any information about the health of the eyes.
 

Vision screenings are conducted by individuals untrained in eye health.

Vision screenings are offered in many places – schools, health fairs, as part of a work physical or for a driver’s license. Even if your physician conducts the screening, they are a generalist and only has access to a certain amount of eye health training. Most individuals don’t have the tools or knowledge to give you a complete assessment of your vision or eye health.

Vision screenings use inadequate testing equipment.
In some cases, a vision screening is limited to an eye chart across the room. Even when conducted in a physician's office, they won’t have the extensive testing equipment of an eye doctor. They also won’t be aware of nuances such as room lighting and testing distances all of which are factors that can affect test results.
 

What are the Benefits of a Comprehensive Eye Exam?

Comprehensive eye exams evaluate all aspects of your vision and eye health.
The comprehensive eye exam looks at your eye externally and internally for any signs of eye disease, then tests your vision in a variety of ways.

Regular eye exams are important for children since their eyes can change significantly in as little as a year as the muscles and tissue develop. Good eyesight is critical for a child’s life and achievements since success in school is closely tied to eye health. School demands intense visual involvement, including reading, writing, using computers, and blackboard/smartboard work. Even physical activities and sports require strong vision. If their eyes aren’t up to the task, a child may feel tired, have trouble concentrating, have problems in school or have difficulty playing their favorite games which may affect their overall quality of life.
 

When to Perform a Pediatric Eye Exam?

According to research, a child should have an initial screening between 6 and 12 months of age. After that, routine eye health and vision screenings throughout childhood should be performed in order to help detect any abnormalities as their eyes develop. Then, unless otherwise recommended, every two years thereafter until the age of 18. At The Eye Zone Dallas, we offer eye exams for children ages 4 and above. 

For a newborn, an optometrist should examine the baby’s eyes and perform a test called “red reflex test” which is a basic indicator that the eyes are normal. In a case that the baby is premature or at high risk for medical problems for other reasons, has signs of abnormalities, or has a family history of serious vision disorders in childhood, the optometrist should perform a comprehensive exam.

A second eye health examination should be done to infants between six months and the first birthday. This examination includes tests of pupil responses to evaluate whether the pupil opens and closes properly in the presence or absence of light, a fixate and follow test to determine whether the baby can fixate on an object such as a light and follow it as it moves, and a preferential looking test which uses cards that are blank on one side with stripes on the other side to attract the gaze of an infant to the stripes and thus vision capabilities can be assessed. Infants should be able to perform this task well by the time they are 3 months old.

For a Preschooler, between the ages of 3 and 3½, a child’s visual acuity and eye alignment should be assessed. If the child is diagnosed with misaligned eyes (strabismus), "lazy eye” (amblyopia), refractive errors (astigmatism, myopia, hyperopia) or any other focusing problems, it’s important to begin treatment as soon as possible to ensure successful vision correction and life-long benefits.

At School age or upon entering school, the child’s eyes should be screened for visual acuity and alignment. In this age group, nearsightedness (myopia) is the most common refractive error and can be corrected with eyeglasses.
 

If you’ve never worn contact lenses before, it can seem a bit intimidating. After all, you’re inserting something into your eye! Let’s ease your mind about the first step – your contact lens exam. This post will walk you through what’s involved in a contact lens exam and what you can expect every step of the way.
 

It begins with a comprehensive eye exam

Your eye doctor will first determine your overall eye health and vision. This includes a discussion of your health history and then a series of standard eye tests. These tests will evaluate eye focusing, eye teaming, depth perception, color vision, peripheral vision, and the response of your pupils to light. The doctor will also measure your eye’s fluid pressure to check for glaucoma, evaluate your retina and optic nerve, and test your vision with different lenses to assess whether contact lenses can improve your vision.
 

Then, a discussion about your contact lens preferences

If contact lenses are appropriate for you, it’s time to talk about your contact lens preferences. For example, do you want to enhance or change your eye color? Would you prefer daily disposable lenses or overnight contacts? Ask about the benefits or drawbacks of each, so that you make the best decision. If you’re over 40, your doctor will likely discuss age-related vision changes and how contact lenses can address these issues.
 

Next, the eye doctor will conduct eye surface measurements

Contact lenses require precise measurements of your eyes to evaluate diagnostic lenses properly. Using an instrument called a keratometer, your doctor will measure the curvature of your eye's cornea, the clear front surface of your eye. Next, the size of your eyes pupil is measured using a card or ruler showing different pupil sizes which is held next to your eye to determine the best match.

Myopia is a very common issue throughout the world. Approximately 1/3 of the population in the United States have the condition and over 90% of several East Asian countries suffer from myopia. While myopia may seem like such a common condition that it shouldn’t be cause for concern, it is actually associated with several very serious conditions that can threaten one’s ability to see.
 

What is Myopia

Myopia, more commonly known as nearsightedness, is a condition where individuals are able to see objects that are close to them but may have difficulty distinguishing things at a distance, such as road signs or leaves on a tree. These individuals often squint at objects that are further away to try and help bring them into focus.

Currently, there is no known cure for myopia and recent studies suggest that the more advanced your myopia gets, the more serious the effects can be on your vision. This has led eye professionals to look for ways to slow the progression of myopia in children and young adults as the eyes typically change more rapidly during this time and slowing down myopia progression during these years has a huge payoff. 
 

Types of Myopia Control

There are a few different treatments for myopia that have proven to be effective in a number of studies. Of course, to ensure you find the most effective choice for you, be sure to visit with your eye doctor so they can review your case and recommend the best options for you.

Atropine Eye Drops | One of the thoughts about the progression of myopia, is that it is associated with eye strain. The additional stresses that are placed on the eye when straining push the eye further out of its proper shape. Atropine eye drops are specifically designed to help stop the eye from straining and help the muscles relax. Atropine is similar to the eye drops that are used when you get your eyes dilated but lasts throughout the entire day rather than just a few hours. Atropine dilates the pupil of the eye and prevents them from closing too tightly and limiting your vision. This treatment has been shown to be especially effective in slowing the progression of myopia in children.
 
Multifocal Eyeglasses and Contact Lenses | These specialty contact lenses are designed to help reduce strain on the eyes. They have shown great success at slowing the progression of myopia over a three-year period when compared with individuals who wore a standard prescription lens.
 

You might be surprised at how many tests eye doctors use to diagnose glaucoma. A proper diagnosis requires careful evaluation of many aspects of your eye’s health – from eye pressure to cornea thickness to the health of your optic nerve. This article describes how your eye doctor assesses your risk and all the tests needed to properly diagnose glaucoma.
 

Risk Factor Assessment

Your eye doctor will begin by assessing your risk level for developing glaucoma. This will help determine the frequency and extent of testing needed. Through a family history and medical questionnaire, the eye doctor is looking for the following risk factors:

• Over the age of 60

• Ethnic background such as African or black Caribbean descent, Hispanic, or Asian

• Family history of glaucoma, such as a sibling or parent with glaucoma

• History of eye conditions, injuries or surgeries

• Prolonged corticosteroid use (eye drops, pills, inhalers or creams)

• Chronic conditions that affect blood flow, such as migraines, diabetes, low blood
  pressure or hypertension

• Current or former smoker
   

If you’ve already had a comprehensive eye exam, your eye doctor will also consider these risk factors:

• Eye pressure higher than normal (above 21 mm Hg)

• Thin corneas (less than 0.5 millimeters)
   

Your type of eyesight is also important. People with farsightedness are at a higher risk for narrow-angle glaucoma, a more serious type that can advance quickly. While nearsightedness is associated with open-angle glaucoma, which progresses slowly without any symptoms.
 

Standard Glaucoma Tests

During a comprehensive eye exam, your eye doctor will always check for glaucoma, regardless of the risk level. This provides a baseline for comparison as you age. There are two tests: tonometry and ophthalmoscopy.
 

If you’ve been diagnosed with cataracts, you may wonder if cataract surgery is right around the corner. Not to worry. There are many preventive steps you can take to slow the progression of cataracts and preserve your vision. That doesn’t mean you won’t eventually need surgery, but you can at least delay the need for quite a while.
 

Protect Your Eyes from the Sun

The National Eye Institute recommends protecting your eyes from the sun's harmful ultraviolet (UV) and high-energy visible (HEV) rays by always wearing good quality sunglasses while outdoors. Look for sunglasses that block 100 percent of UV rays and absorb most HEV rays with large lenses or a close-fitting wraparound style. Remember that the peak hours for sun exposure are between 10 am and 3 pm or 11 am and 4 pm during daylight savings time and that the sun’s rays are strong enough to pass through clouds, so you need your sunglasses every day.
 

Avoid Steroid Eye Drops

Steroid eye drops are routinely prescribed to treat dry eyes or an arthritic flare-up in the eyes. Unfortunately, they can also speed up the progression of cataracts. Talk to your Optometrist about how you can manage both conditions without inadvertently making your cataracts worse – and hastening the need for surgery.
 

Check Your Medications

There are over 300 commonly prescribed medications with side effects that may impact cataract progression. Since your primary care physician may not have access to your eye doctor’s medical records, be sure to ask your doctor if your current medications will affect your cataracts. If you must stay on the medication, it’s even more important to avoid sunlight during peak hours and to wear sunglasses.
 

Eye emergencies cover a range of incidents and conditions such as; trauma, cuts, scratches, foreign objects in the eye, burns, chemical exposure, photic retinopathy, and blunt injuries to the eye or eyelid. Since the eye is easily damaged, serious complications can occur from an eye injury thus, any of these conditions without proper treatment can lead to a partial loss of vision or even permanent blindness. Likewise, certain eye infections, other medical conditions, such as blood clots or glaucoma, and eye problems such as a painful red eye or vision loss that are not due to injury also need urgent medical attention.
 

Depending on the type of injury, any of the following symptoms may be present:

• Bleeding or other discharge from or around the eye

• Bruising

• Decreased vision

• Double vision

• Loss of vision, total or partial, in one eye or both

• Pupils of unequal size

• Eye pain

• New or severe headaches

• Itchy eyes

• Redness or bloodshot appearance

• A sensation of something in the eye

• Sensitivity to light

• Stinging or burning in the eye

• One eye is not moving like the other

• One eye is sticking out or bulging

• Nausea or headache occurring with eye pain (this may be a symptom of glaucoma or stroke).

A black eye is usually caused by direct trauma to the eye or face, causing a bruise resulting from bleeding under the skin. The skin around the eye turns black and blue, gradually becoming purple, green, and yellow over several days. Swelling of the eyelid and tissues around the eye may also occur. The abnormal color usually disappears within 2 weeks.

A blow to the eye can potentially damage the inside of the eye. Trauma is also a common cause of hyphemia, which is blood inside the front of the eye and is often due to a direct hit to the eye from a ball. Besides, certain types of skull fractures can cause bruising around the eyes, even without direct injury to the eye.

A chemical injury to the eye can be caused by a work-related accident, common household products such as cleaning solutions, garden chemicals, solvents, or other types of chemicals. Fumes and aerosols can also cause chemical burns. With acid burns, the haze on the cornea often clears and there is a good chance of recovery. However, alkaline substances such as lime, lye, drain cleaners, and sodium hydroxide found in refrigeration equipment may cause permanent damage to the cornea. It is important to flush out the eye with large amounts of clean water or salt water (saline).
 

Low vision is a term for conditions that result in reduced sight and cannot entirely be corrected with eyeglasses, contact lenses, medicines or surgery. Several eye diseases or conditions can cause low vision and here we will discuss the four most common causes of low vision and their risk factors.
 

Macular Degeneration

Macular degeneration is a disorder that affects the retina, which is the light-sensitive tissue lining the inside of the eye. Within the retina, the area responsible for sharp central vision (called the macula) deteriorates, causing blurred vision. This can cause a blind spot in the central area of vision, which leads to low vision.

There are two types of macular degeneration – non-exudative (dry form) and exudative (wet form). The dry form usually progresses slowly, while the wet form causes more rapid and severe vision loss due to abnormal blood vessels developing under the macula and leak fluid and blood. The biggest risk factor for macular degeneration is age. Other risk factors include genetics, race, smoking, and high blood pressure.
 

Diabetic Retinopathy

Diabetic retinopathy is a diabetes complication that affects the eyes. High blood sugar levels cause damage to blood vessels in the retina. These blood vessels can swell and leak (called macular edema). Sometimes they close, stopping blood from passing through (called macular ischemia). At first, diabetic retinopathy may cause no symptoms or only mild vision problems. However, over time, it can severely damage the retina, leading to low vision. Anyone who has diabetes can develop diabetic retinopathy. The risk increases for those who have had diabetes longer, as well as those with poor control of blood sugar levels, high blood pressure or cholesterol as well as those who smoke.
 

Cataracts

A cataract is a clouding of the lens in the eye that affects vision. This clouding can block the light from reaching the retina at the back of the eye, resulting in a general loss of vision. In some cases, a cataract can be surgically removed. Cataract surgery has a high success rate in otherwise healthy eyes but it is not always possible for people who also have other eye diseases. While the risk of cataract increases as you get older, other risk factors include diabetes, smoking, alcohol use, and prolonged exposure to ultraviolet sunlight.
 

Glaucoma

Glaucoma is a disease that damages your eye’s optic nerve. Most commonly, this occurs when fluid builds up in the front part of your eye which increases the pressure in your eye, damaging the optic nerve. There are four types of glaucoma: open-angle, normal tension, angle-closure, and secondary.
 

The Demodex mite is a type of parasite that lives on humans and can reside in hair follicles and sebaceous glands. These mites are arachnid (eight-legged) and invisible to the naked eye, varying in size from 0.1mm to 0.4 mm long. They typically live on the face and in the hair follicles of the eyebrows, eyelids, roots of the eyelashes, facial hair, and around the ears and are associated with various skin problems of the eyes and face, such as blepharitis and acne rosacea.

Demodex can affect humans at any age, but their presence increases in prevalence with increasing age. Immunity compromised patients such as diabetics, patients on long-term corticosteroids or chemotherapy, or patients who have HIV/AIDS also have increased risk and prevalence of Demodex infection. Usually, when the immune system is weakened and the parasitic population has colonized, this disease can badly damage the skin.
 

How Can Demodex be Transmitted?

For transmission of mites from one person to another, direct contact of hair and sebaceous glands on the nose, or dust containing eggs is required. Since the disease processes begin when there is an overpopulation of Demodex, the vast majority of cases of mites go unobserved and don't show any adverse symptoms. However, in certain cases, the mite populations migrate and multiply in the eyelashes.
 

What Are The Types of Demodex?

There are two existing types of Demodex mites: the longer kind, Demodex folliculorum, which live in the hair follicles and the short ones, Demodex brevis, which live in the sebaceous (oil) glands in the skin.
 

What Are The Symptoms of Demodex?

In the early stages, there are often no noticeable symptoms, but if left untreated Demodex can progress. Symptoms vary among patients and may include dry eye, red eyes, severe itching along the eyelid margin and eyebrow, especially in the morning, eyelid irritation, burning sensation, foreign body sensation that seems to originate beneath the eyelids, heavy lid, and blurry vision. One of the earliest signs of mite infestation is cylindrical dandruff (CD), which is the accumulation of fine, waxy, dry debris that collects at the base of the lash and extends up to 2 mm along the length of the lashes and is most noticeable on the upper lashes.
 

When you were a kid, did you experience your eyes become reddish and all of a sudden, someone close to you was also suffering from it? Your eyes, as well as those who contracted it, got itchy and swollen, right? Then it must have been that you were suffering from pink eye.

Pink eye is well known as conjunctivitis and it is the infection or inflammation of the conjunctiva or the transparent membrane that serves as a covering for the white part of the eye called the sclera that lines the eyelid. In addition to inflammation, there is usually tearing in the eyes that emits a sticky discharge which develops into a crust while one is sleeping, making it difficult for the patient to open their eyes in the morning.

One thing about the pink eye, which could affect one or both eyes, is that it is highly contagious. While it is more common in children, adults can also be victims of this eye condition. Here are the 3 major causes of pink eye:
 

Bacteria

Streptococci and staphylococci are bacteria types that are most responsible for pink eye. However, chlamydia and gonococci can also cause pink eye. It is accompanied by serious eye pain, itching, swelling, redness, and discharge. The spread of bacterial pink eye is usually as a result of using personal items of infected parties, such as makeup or makeup tools that have been infected with bacteria or putting dirty hands in the eyes. If not treated, it can last for more than 10 days, but if treated, it should resolve in less than 3 days.
 

Allergies

Pink eye caused by allergies is followed by serious itching and tearing of the eyes. Pain is minimal, but it typically comes with quite a bit of discomfort. Most of the time, pink eye is accompanied by sneezing or coughing. Allergens that trigger pink eyes include grass, dust, pollen, mold, and ragweed. Allergy based pink eye is not usually contagious.
 

Viruses

Viruses such as the adenoviruses and herpes virus are the most common causes of pink eye. When a virus is the cause, there is usually a lot of teary discharge accompanied by nasal congestion, puffy eyelids, runny nose, and sharp pain. It is usually contracted from cough and sneeze droplets from an infected individual. It can take as long as 2 weeks to treat depending on the seriousness of the infection.

General Symptoms of Pink Eye:

• Itchy eyes

• Redness of the sclera

• Pain

• Watery discharge

• Swollen eyelids

• Hazy or blurry vision

• Oversensitivity to light
   

Prevention

The best way to prevent pink eye is by practicing good hygiene which includes:

• Avoid putting dirty hands in your eyes

• Make it a habit to wash your hands often

• Avoid sharing towels and other personal items

• Do not use dirty items

• Changing your pillow cover regularly

• Do not leave a makeup item open for too long

• Avoid sharing makeup items like eyeliners, mascara, etc.
   

Treatment of Pink Eye

• The treatment of pink eye is dependant on its underlying cause. If it is caused by a virus, you just might have to wait for the virus to run its course which could last for about four to seven days. Virus caused pink eye could be easily contracted so it is imperative to try and prevent further spreading. Viruses cannot be cured by antibiotics, but some antiviral drugs could be helpful.

• Antibiotics are most effective against pink eye caused by bacteria as they reduce the lifespan of these bacteria and could come in the form of eye drops or pills. Based on the doctor’s prescription, an eye drop should be administered about four to six times daily. It is important you finish using your drugs even after the disappearance of symptoms.

• To deal with pink eyes caused by allergies, the allergy should be treated. Once treated, pink eye should disappear. It is also important to avoid allergens as much as possible so as to avoid pink eye.
   

Whenever the symptoms of pink eye emerge, the best preventive measure is to stay at home until the watery discharge ceases to avoid the spread of the bacteria or virus. You should also visit your doctor immediately to begin treatment. While mild pink eyes generally go away on its own, some of the more serious forms can cause a scar on the cornea.