The brain controls what we see since it is the optic nerve behind the eye which is linked to the brain which allows us to reconstruct the images we see.
But our brain is sometimes wrong ! Whether deceived by optical illusions , subliminal images , camouflage , mirages , trompe - l'oeil or a phenomenon known in ophthalmology: the blind spot , we will reveal everything to you.
What is an optical illusion?
It is a visual perception different from reality, a mental distortion of an image due to an erroneous interpretation of the brain. For example: can you tell which way this metro goes?
The subliminal image is an image that is undetectable to the naked eye but that the brain would still process . For example, in the middle of a film, an image can be slipped in for such a short time that we wouldn't have time to see it, yet the brain would see it and integrate it into our subconscious.
What is camouflage?
Camouflage is a technique aimed at creating an optical illusion phenomenon in order not to be seen . Chameleons are the kings!
What is a mirage?
It is a phenomenon of reflection of light coming from a region where the air is cool and penetrating into a region where the air is warmer. Thus light rays become curved. The objects are coupled with an inverted image suggesting a reflection on a body of water. One can observe mirages especially in the deserts or on the roads.
What is a trompe l'oeil?
It is a painting which gives the illusion of reality , by an excellent rendering of the relief of the object , this thanks to a play of shadows and lights. It is an art known and practiced since antiquity.
What is the blind spot?
It is the only point on the retina where we cannot see , due to the absence of photoreceptors. It is where the optic nerve and blood vessels leave the eye.
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Detection of vision problems in children at school
At least 30% of primary school failures are due to late detection of vision problems . This is why for several years it has been proposed to the Minister of National Education, Higher Education and Research to set up screening campaigns in collaboration with optical professionals. The aim of this approach is to reduce the school failures of children.
Ophthalmological control in children
The ophthalmological examination is a health check that should not be overlooked for your child. According to Doctissimo , today approximately 620,000 children under the age of 6 in France have a sight problem and nearly 62,000 have not been detected. It is important to know that a sight problem can have very negative and serious consequences for the child if it is not corrected : loss of concentration, isolation, delay in reading, school failure …
In order to avoid these problems it is necessary to make an annual ophthalmological control to the child from the age of 3 years.
Screening campaigns in primary schools
Parents and educational teams do their best to ensure that children succeed in school, today there are school supports as well as AVS who can accompany children in great difficulty. However, late detection of vision problems is one of the leading causes of failure in primary education . This is why screening campaigns in schools are being discussed. We could soon see the first campaigns in the big cities.
Find the right glasses for your face shape
Lots of frames catch your eye? Very big ones, very small ones but you don't know which one is made for you? We will try to give you advice so that you can find the frame that will enhance your face.
Good food for good eyesight!
We think of paying attention to what we eat to improve nail growth or to have shiny and healthy hair, but our eyes are often neglected!
Yet they also require that we take care of (y)them , starting with what we put on our plates.
A good diet makes it possible to avoid all sorts of inconveniences due to certain deficiencies , such as AMD (age-related degeneration), glaucoma or quite simply to avoid worsening an already existing sight problem .
To begin with, a balanced and varied diet helps maintain a healthy overall lifestyle.
Here is our pick of the best foods for healthy eyes:
These are polyunsaturated fatty acids that are necessary for the proper functioning of the human body but that it cannot produce by itself. They must therefore be found in the foods we eat. They are present in large quantities in nuts, chia seeds, flax seeds, in shrimp and in fatty fish such as herring, salmon, sardines, etc.
Vitamins A, B, C and E:
- Vitamin A is one of the molecules that make up the retina , it helps protect the cornea. It becomes very useful during conjunctivitis, glaucoma, cataracts or major vision problems , indeed a vitamin A deficiency would cause total blindness .
Vitamin A is found in calf's liver, carrots, broccoli, spinach...
- Vitamin B improves eyesight and prevents its decline , especially the "sub-vitamin" B2, riboflavin.
It is found in abundance in foods of animal origin such as cheese, eggs, meat or fish. It is also found in green vegetables such as spinach, asparagus or even in cereals or brewer's yeast.
- Vitamin C plays an important role in reducing the risk of cataracts and AMD . Indeed, the retina and the lens are bathed in a fluid with a very high vitamin C content . It is therefore necessary to ingest vitamin C to allow a good balance.
Vitamin C is easy to find in large quantities: in citrus fruits, red fruits such as blueberries or blackberries, broccoli, peppers...
- Vitamin E would have a protective effect against AMD and cataracts . It would reduce the progression of these disorders .
A daily dose of it by eating for example almonds, hazelnuts, sunflower seeds, avocados, etc. would provide protection against these diseases.
It is a very good element in the preservation of your sight and the good health of your eyes , it is found in cocoa, wheat germ, eggs, cashew nuts.
In order to have healthy eyes, integrating these foods into a balanced diet is the solution. When the good weather arrives, it is easy to find many fresh products rich in vitamins and minerals. It is also possible to take food supplements to complete a varied and balanced diet. But like everything, be careful with the doses taken, an overdose would cause negative side effects.
Foods to avoid:
A diet too rich in omega-6 including too many vegetable oils, seeds, eggs or certain meats would tend to cancel the effects of omega-3.
Processed foods of industrial origin which have little nutritional value and therefore no vitamins, minerals, necessary for the functioning of the body in general.
An unhealthy body will lead to vision problems as you age.
stroke and vision
A stroke, stroke or stroke is caused by a blood clot causing the interruption of blood circulation in a larger or larger area of the brain. Stroke is the third cause of death in France , there are several ways to recognize the symptoms. This makes it possible to act more quickly and to avoid irreversible causes.
Sudden Loss of Sight: Beware of Strokes
A stroke can affect everyone , there is no age or physical factor. Being one of the leading causes of death in France It is important to communicate about all the symptoms that occur before the accident. Among these different symptoms, memory disorder, loss of speech, fatigue, loss of balance, numbness of the face, violent headaches, malaise, tremor, paralysis, are also found disturbance or total loss of sight . You can indeed lose up to half of your visual field or even have double vision at the start of a stroke.
Whether you have vision problems or not, a sudden disorder or loss of sight is not trivial it may indeed be one of the symptoms of stroke. It is therefore important to take into account all the symptoms of this tragic accident, including that of sight ( which is not sufficiently communicated ) in order to anticipate it better . If you experience some of these symptoms no need to wait can be fatal, so it is urgent to call an emergency number such as 15 or 112 before it is too late.
Many strokes cause irreversible lesions at the level of the brain and causes in the individual: Loss of memory, facial or bodily paralysis.
That's why prevention is the best strategy for fighting strokes .
the corneal trauma is one of the main reasons for consultations with ophthalmologists in the emergency room. Do-it-yourselfers and "Sunday" gardeners generally do not protect their eyes before working and are the first to be affected by corneal trauma. There are also those who go down the ski slopes without goggles, those who receive a punch in the arcade and the reckless who uncork a bottle of champagne, paintball incidents... just as many situations that cause eye shock and damage the cornea.
Symptoms of Corneal Trauma
The pain is often immediate and very intense , it is this in general that informs the individual and leads him to the hospital or to a doctor. However it can happen that the pain occurs several hours later and often at night , such as during an ultraviolet burn. In these cases he is important to go to the CHU the nearest in order to have a precise medical opinion and to be treated by an expert in ophthalmology.
Prevention of corneal trauma
To protect your cornea, your eyes and also protect your sight, there are simple gestures such as wearing safety glasses or DIY glasses when practicing your activities. These protective glasses are available in eyeglasses , in sunglasses and glasses without correction . For those who are skiing there are the preferably sunglasses with polarized lenses . For a solar eclipse there are special category 14 lenses that protect your eyes.
The different treatments to cure corneal trauma
If it is a "classic" foreign body ; Dust, grain of sand… Just rinse his eyes with cold water .
If it is a chemical splash it's necessary rinse the eye with physiological serum for at least 15 minutes then consult an ophthalmologist afterwards even if you have no pain.
After a physical burn you don't have to do anything alone you have to immediately go to the university hospital to be handled by an expert.
If you have just received a shock (punch) I don't have to rinse the eye or touch it, you have to close it and also go see a doctor.
In the most serious cases there is a corneal transplant !
The good weather is back and we are taking advantage of the weekends in May to garden, clear brush, do some DIY…
Many traumas, shocks or eye injuries are counted each year and about 50% of them occur at home.
Be safe also at home:
For most of us, safety glasses or goggles rhyme with professional environment
Good nutrition for good vision
Eating well is essential to seeing well. Indeed, certain nutrients such as vitamins and minerals help us naturally to protect our vision from the irreversible effects of age. With good nutrition, the risk of vision loss is reduced. considerably reduced .
Foods friendly to our eyes
- Vitamin A, essential for the retina
- Beta-carotene, antioxidant precursor of vitamin A
• Sweet potatoes
- Vitamin C protects the cornea and lens from oxidation and helps prevent cataracts
• Green leafy vegetables
- Lutein and zeaxanthin, components of the macula against cataracts and AMD
• Yellow, orange or green fruits and vegetables
- Omega-3, to maintain the retina and against dry eyes
Exposing ourselves to the sun so that our eyes do not lack vitamin D
Although some foods have vitamin D, it is important to go out and expose yourself to at least 15 minutes a day under the sun. UV will allow your eyes not to miss this essential vitamin . If you have children encourage them to play outside and expose themselves to the sun (watch out for over-exposure!).
Conclusion on what it does good for us
To have beautiful healthy eyes, it is It is important to eat a varied and balanced diet without forgetting fruits and vegetables which contain many vitamins. To protect your eyesight, you must also subtract two components: Cigarette smoke and the sun's rays, so avoid smoking and wear protective clothing. sunglasses to protect your eyes from early aging .
Pixium Vision, the Iris project comes to fruition
A young French company, Pixium Vision has been bringing new perspectives to the visually impaired or blind for several years; indeed it will be able to help more than 4 million people through the Iris project. This consists of restoring part of the visual functions of the blind. in order to restore their sight. State-of-the-art technology that would allow blind patients to return to a "normal" life.
A great step forward for optics
With the project of making the view thanks to simple implants , the French company is revolutionizing the world of optics and brings real hope to these many patients with blindness. Pixium Vision has announced European approval for its artificial retina. Once this standard was validated by the European Union, the marketing of Iris quickly began. This new project has 3 times more electrodes than the first version, which would provide patients with vision as close to normal as possible. This week Pixium Vision successfully implanted and activated its Iris II bionic eye in a Spanish patient.
The new project of the French company Pixium Vision
The company does not stop there and is currently working on other projects in parallel such as Prima . This consists of the creation of a sub-retinal implant which would improve the sight of individuals suffering from age-related macular degeneration (AMD). Pixium Vision is also looking for solutions for patients with retinopathy pigmentosa.
Let's not forget that, whatever our age, it is important to protect ourselves from AMD, one of the causes of this visual disease: harmful artificial blue light given off by screens. So when you are in front of your computer, television, smartphone or even your tablet adopt the right gesture, wear a pair of sunglasses with a “Cool Blue” treatment.