EyeMark Newsletters

A list of all our EyeMark Newsletter Articles

WHILE WE WEREN'T LOOKING


What a year it's been, huh? A rollercoaster in every sense of the word. There were sanctions and nuclear threats and discussions about refugees. Paris celebrated its victory at being awarded the 2024 Olympics, while we mourned the news that we won't be hosting a certain World Cup. But you know what? A lot of things went almost unnoticed while we had our eyes fixed on Brexit and an orange president who doesn't know when to stop tweeting. (Not to mention another president who threw in the towel after 37 years.) While all this was happening, most of us didn't even notice that other pretty amazing things were happening. While we had our eyes on Twitter and Trump, others used their eyes to make some incredible discoveries. Such as... a new species of orangutan was discovered in Indonesia this year. They say it was the first new ape species to be discovered in over a century. I don't know how they found it, but there it is. And if the discovery of a new orangutan is something special, how about the discovery of a whole new continent?! Yup, a new continent (which is mostly underwater) was discovered this year in the South Pacific. It's called Zealandia, and word is it'll soon be officially recognised as earth's eighth continent. So while we had our eyes on an assortment of Kardashians, someone was busy discovering a whole new land mass. And we all heard about the total solar eclipse in 2017. But did...
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HOW ACCURATELY DO WE SEE OURSELVES?


The camera never lies. Or does it? Does the camera give a more accurate view of ourselves than a mirror does? Or is the image we see in the mirror a truer reflection of what we really look like? Does the image we have of ourselves match the way other people see us? We assume that the camera records exactly what our eyes see, but the truth is that, although there are some similarities, the camera and the eyes "see" differently. Both the camera and the human eye process light and record images, but the brain interprets and makes sense of what is seen.   Human Eye vs Camera As with a camera, light enters the eye through the front part of the eye, the cornea, is focused by the lens, and passes through the eye until it reaches the retina at the back of the eye. The pupil and the iris act like the aperture in a camera lens, opening and closing depending on the amount of light reaching the eye and the amount of clarity needed. The retina contains two types of light-sensitive receptors, rods and cones. Rods perceive light while cones are sensitive to colour. Once the eye captures an image, it is sent via the optic nerve to the brain, where the processing happens. Unlike the camera, which snaps a picture and that's it, our eyes receive a continuous flow of images, which the brain later processes into what we actually see. The eyes "look" while the...
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I CAN SEE CLEARLY NOW! (THE TREES HAVE LEAVES!)


"I think its time for this cataract to be removed." This observation by my optometrist did not come as a surprise! I had known for some time that I had cataracts in both eyes, and that the one in my right eye was considerably worse than the left one, but they were not posing any problems. YET!! Over the past year or so I had begun to notice changes in my right eye. My vision had deteriorated dramatically, to the point that I was unable to read the print on the TV screen, and my optometrist had to change my contact lens script every few months. Night driving had become increasingly difficult, the headlights of oncoming cars too bright, and haloes appearing around street lights and other lights. My left eye could compensate to some extent for activities such as reading and computer work, but distance vision had become a strain, even when I was wearing glasses or contact lenses. Reluctant as I was to have eye surgery, I was forced to agree with my optometrist that the time had come to make an appointment with an ophthalmic surgeon. Doctors have their individual styles, protocols and procedures for running their practices, and this was my specific experience with my particular ophthalmic surgeon, which may not be the same for another one. After taking a detailed health, family and vision history, she conducted a comprehensive eye examination. She started with a visual acuity test to measure the clarity of my vision with...
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THE EFFECTS OF ALCOHOL ON THE EYES


As 2017 draws to a close, we would like to take this opportunity to wish you and your families a joyful, peaceful and safe festive season, and all the best for the coming year. Frequently called the "silly season", for good reason, the end of the year brings with it many occasions to celebrate, spend time with family and friends, and sometimes indulge in excessive consumption of alcohol. Moderate drinking may lead to some changes in vision, but these are usually short-term. Heavy drinking over an extended period of time often impacts the body and the eyes in a more serious way, and the effects can be more permanent.   Short-term visual effects Consuming alcohol in moderation is unlikely to have any lasting adverse effects on the eyes, and the symptoms usually disappear shortly after a drinking episode. The way the body responds to alcohol differs from one person to another. The way your body responds depends on the amount consumed and your tolerance threshold. Alcohol slows the pace of communication between neurotransmitters in the brain. Neurotransmitters are chemical messengers that communicate information around the brain and to the body. The delay in communication between the brain and the eyes affects eye muscle coordination. This may result in distorted or double vision, difficulty with depth perception, difficulty judging distances, and decreased peripheral vision. It makes perfect sense, then, not to drink and drive! Excessive drinking decreases the reaction time of the pupils, which are unable to constrict or dilate effectively when...
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