At Hannes Zwarts Optometrists, our goal is to provide the ultimate eye care experience to our patients.

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C/O Kerk and Taute Streets, Dros Centre, Ermelo South Africa Tel: +27 17 811 2363/86 
E-Mail: info@lzoptometrists.co.za

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"Member of the South African Optometric Association"


ORTHOKERATOLOGY:

What is Orthokeratology?

CRT (Corneal Refractive Therapy) and Accelerated Orthokeratology is an approved non-surgical method that can reduce and even eliminate myopia (nearsightedness) & astigmatism.  

CRT / Orthokeratology is an effective alternative procedure for anyone with myopia and astigmatism.

 This lens therapy program employs specialized contact shaping lenses that normalize the cornea (shape, curvature & power) while worn during sleep, resulting in better vision without glasses and contact lenses during waking hours.  

The CRT / Orthokeratology contact shaping lenses are the result of a remarkable technological breakthrough. 

Their highly permeable material is approved for overnight wear. 

Their unique design gently reshapes the cornea to bring the eye into correct focus. To maintain the correction, retainer lenses must be worn regularly while sleeping.

Important Facts to Know:

CRT/ Orthokeratology is a non-surgical vision improvement treatment.

 Your vision will improve very rapidly in the first few days & weeks. 

This procedure is convenient and comfortable. 

As your vision normalizes, you will be seen frequently to map the progression of improvement.

 During the initial therapy period, you may be provided with disposable contact lenses to use during the day if necessary, as determined by your Optometrist. 

You can have glasses-free, contact lens-free, vision for sports and recreation.  

This treatment has been approved for all ages and can minimize deteriorating vision in children and others with myopia.

COMPUTERISED READING ANALYSIS:

 VISAGRAPH ANALYSIS OF READING

Introduction 

The task of reading is a complex interaction between what the eyes send into the brain and what the brain does with that information.

 Reading is a learned process, and eye movements for reading follow a developmental process much like learning to walk.

 Poor readers have poor eye movements for reading. 

These eye movements are not subject to conscious control, but can cause or reflect problems that exist in the reading process. 

How does the Visagraph work? 

Research has shown that the eye movements of most people are developed over time during the "learning to read" phase of schooling. 

Eye movements for reading become habitual and stable as long as the material being read isn't excessively difficult to either read or comprehend.

 Because of this, eye movements can be measured and compared against expected norms for other people of the same educational experience. 

The Visagraph uses infrared sensors to track eye movements while the individual reads a passage, and then compares these eye movements with measurements taken from a large study of people. 

Comprehension questions given at the end of the reading exercise ensure that the passage read was not so difficult that it may have affected the person's usual manner of reading. 

What does the Visagraph measure exactly? 

The Visagraph looks at many variables to determine how the person is performing during reading. It gives results in terms of grade level efficiency. 

This is not a measure of the person's achievement or capability, but rather a measure of how hard they have to work compared to others in their grade level. 

Many children may be reading on or above grade level in comprehension and fluency, but using an efficiency level far below their grade level. 

The Visagraph evaluates how much information is being looked at with each pause, how long the pause takes, and how many pauses are needed.

 It also looks at how many times the eye looks back over what is previously read, and how easy or hard it is for the reader to find the next line. 

It also measures whether or not the eyes seem to be working as a team to process information. 

When combined with a Developmental Optometric Exam, the Visagraph can provide insight into whether the poor eye movements are causing the poor reading or whether poor reading is causing the poor eye movements. 

Who can benefit from a Visagraph test? 

Anyone who struggles with any aspect of reading - comprehension, speed, fatigue, etc., can benefit. 

A Visagraph evaluation can help to identity if they may have a vision problem. 

The Visagraph can also be used to determine needed areas of remediation for children who are not reading on their grade level for reasons other than binocular vision problems or to identify if poor reading habits have been established.

VISION IMPROVEMENT THERAPY:

What is Vision Therapy? 

Just as language and motor skills are not present in their complete form in an infant but are achieved through a sequence of developmental stages, vision also follows a progression of development. 

At any point during the process due to a variety of genetic and environmental causes, the visual system development can be altered, hindered or stopped. 

When areas of development are delayed, parents, teachers, and health professionals identify the problem and intervene with therapy or training activities designed to assist the child in overcoming the delay.

 Vision Therapy uses progressive therapeutic visual procedures to develop or improve normal visual abilities such as eye-teaming skills, visual acuity, focusing skills, tracking skills, depth perception, visual memory, and visual form discrimination. 

Who can benefit from Vision Therapy? 

Research indicates that 20% of the general population shows signs of binocular vision problems, and many of these problems are undetectable during basic eye exams or routine school screenings. Vision Therapy techniques can assist adults and children who are having trouble achieving their true potential. Length of treatment depends on the problems encountered. 

Is Vision Therapy New? 

Although Vision Therapy is currently an optometric specialty, it is actually an outgrowth of the field of Orthoptics.

 Orthoptics was introduced by physicians in the 1800's and literally means "straightening of the eyes."

 As patients and physicians became more familiar with eyeglasses, medication and surgery, the benefits of Orthoptics fell into lesser importance.

 In the early 1900's, optometrists pioneered the development of Vision Therapy by taking the best that Orthoptics had to offer and adding behavioral and developmental principles to the science of eye care.

Discuss Vision Therapy with your Optometrist!!

LOW VISION ASSESSMENT: 
Low vision is the term eye care professionals use to describe vision impairment from conditions such as macular degeneration for which there is currently no cure.

 It means partial sight, or sight that isn't fully correctable with surgery, pharmaceuticals, contact lenses or glasses. 

Low vision can range from moderate vision impairment, such as tunnel vision or blind spots, to "legal blindness," to almost total blindness

 

 

Devices such as magnifiers, telescopes and closed-circuit television are designed to help the partially sighted enjoy a quality of life with minimal compromise.

 

Vision can be hazy with cataracts, blurred or partially obscured in the central visual zone with macular degeneration, and distorted or blurred with diabetic retinopathy. 

People with glaucoma or retinitis pigmentosa can lose peripheral vision and have difficulty seeing at night.

Children as well as adults can be visually impaired, but it is mostly a problem that afflicts seniors. Vision loss can be very traumatic, leading to frustration and depression. When a child has severe problems with his sight, it is very important to visit a low vision practitioner who can prescribe the best low vision aids. Ignoring a child's visual needs will certainly result in poor performance in school. 

Losing the ability to drive safely, read quickly and view a television or computer screen easily causes many people with low vision to feel shut off from the world. They may be unable to get around town independently, earn a living or even shop for the necessities. Some visually impaired people become completely dependent on friends and relatives, while others suffer alone.

This is too bad, because there are many ingenious low vision devices and strategies that can help people overcome vision impairment and live independently. The first step is to visit an optometrist who specializes in low vision care. He or she can evaluate the degree and type of vision loss, prescribe appropriate low vision aids such as magnifiers, telescopes and video magnifiers, and train the patient to use them.

A specialist can also recommend non-optical adaptive devices, such as large-face printed material, audio tapes, special light fixtures and signature guides.

 And just as importantly, low vision specialists can provide referrals to counselors, who can help low vision patients cope with their new life situation.

If you are having any difficulty seeing — hazy or blurred vision, light sensitivity, loss of peripheral vision, night blindness, a need for more light than before, color confusion, spots or difficulty in reading — see an eye care professional for a complete exam. 

These could be the first signs of a serious eye disease such as macular degeneration or retinitis pigmentosa; you need to take action before further vision loss occurs.

Iridology:

When people are asked what they look at first when they notice an attractive person, several answers come to mind; some say they notice how a person walks or what a person is wearing. Some notice the perfume or cologne they wear, some take notice of the type of body, or the color and style of hair. However a great proportion of people notice the eyes of a person, for the eyes are often described as the windows to our soul. When we look at people's eyes, we can often determine whether people are lying, whether they are angry or whether they are in love. We often can tell whether people are tired or not feeling well because the eyes will appear dull or lack the usual sparkle when people are not in the best of health. The eye is not only the window to our soul; the eye is a map to our body. Iridology or iris diagnosis as it is often called is a method used in alternative medicine to analyze the health status by studying colors, marks and signs in the iris, pupil, and sclera of the eye. Have you ever noticed that there often appear clouds or marks in the iris of your eyes and these often change depending on your state of health or age? Have you noticed that your left eye is different than your right eye? If you have, congratulations, as many people believe that their eye color remains the same all of their lives. Iridology dates back hundreds of years, but the first iris map developed was in the early 1800's by a doctor named Ignatz von Pezcely in Hungary. He is known as the father of iridology. In his childhood it is written that he captured an injured owl in his backyard that had a broken leg. He noticed in one of its eyes that there was a black line but when the leg healed, a white mark appeared where the dark mark was. This incident started a life-long interest and study of iridology. Since then, many scientists, doctors, and health professionals around the world have studied iridology. Modern medicine unfortunately has its limitations and many diagnostic techniques such as blood tests and x-rays are often painful, invasive and carry with them a certain degree of risk. An Iridology examination is an absolutely safe, non-invasive, painless and reliable method of obtaining information about the health status of an individual and one of the few real methods to view all the body organs and systems as a whole and how they interact with each other. The potential is fantastic and Iridology in combination with other natural healing methods is providing an effective solution to the growing rate of chronic health problems! 

We also provide the following services:

-          Cosmetic contact lenses

-          Coloured filters for reading abnormalities

-          Orthokeratology (improved vision during day without glasses/contact lenses or surgery)

-          Drivers-, aviation- or boat license certificates

-          Low Vision Aids for the partially sighted. From simple to complex like telescopes and computerized

-          Advanced dry eye management

-          Vision therapy

-          Corporate vision screenings

-          Contact lenses for Presbyopia (get rid of your reading glasses)

Hypnosis in selective cases

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