Varionet News
Protect yourself from eye allergies!
Le printemps arrive et avec lui de belles fleurs! celles-ci font le bonheur des yeux de certains mais pour d'autres elles sont synonymes d'irritations, sécheresse ou allergies oculaires.
- Qu'est-ce qu'une allergie oculaire?
L’allergie oculaire est une réaction anormale qui se passe au niveau de l’œil. Lors du contact avec une substance souvent étrangère.
Why use degressive reading glasses?
Degressive glasses, complementary glasses for wearers of progressive lenses
Degressive reading glasses, also called proximity glasses, mid-distance or depth-of-field glasses, are the result of innovative glass technology. Indeed they make it possible to rediscover a clear and sharp vision over several distances:
THE BLUE LIGHT SEASON
L'automne ou la saison de la lumière bleue
Le changement d’heures, les vacances de la Toussaint, les jours qui raccourcissent sont autant de signes pour annoncer la saison de la lumière bleue.
Nous rentrons du travail, les enfants de l'école, il est 17 heures, le soleil se couche déjà, la nuit approche. Contrairement aux longues soirées d'été passées à l'extérieur, l'automne et l'hiver nous renvoient à l'intérieur de nos maisons en tête à tête avec nos différents écrans, sources...
Reasons, causes and solutions for presbyopia
WHAT IS PRESBYOPIA AND WHEN TO WEAR GLASSES
You are over 40 years old, and maybe you noticed that when you read a newspaper, a book or your phone, you had some difficulty distinguishing the letters clearly? This is due to the appearance of a vision disorder . More precisely the presbyopia !
To be sure, it's very simple!
Change of hours: what consequences on my vision?
Eye protection glasses for healthcare professionals
QUARANTINE: A KEY MOMENT
Often, the first discomfort is felt when returning from vacation: when the light decreases, after summer or following a sudden fatigue. Suddenly, you can no longer read the newspaper, restaurant menus or notices just by holding them at arm's length.
Don't panic, it's normal and natural!
Winter tips for your eyes
On the way to the holidays
Myopia
The myopic eye
Myopia is a visual abnormality identified since antiquity by Aristotle. This is refractive disorder more common in the world . Some ophthalmologists even speak of a global epidemic: according to a study conducted by the University of Canberra (Australia) 90% of young students in developed countries in Asia are myopic against 30% in the 70s. This phenomenon is found all over the world, in the USA the population of myopes has increased from 25 to 45%.
What is myopia ?
Myopia is a problem of refraction, the myopic subject sees badly from afar and very well up close . Everything happens for him as if he were looking through a magnifying glass. The image of a distant point is blurred for the myope, it is formed in front of the retina and not on it as in the case of the emmetropic eye (normal eye). As a result, the myope sees a spot and not a point!
On the other hand, when looking closely (without correction), the myope sees clearly without involving the accommodation reflex.
In the vast majority of cases, myopia is " axil ”, that is to say that she is the consequence of an eyeball that is too long (+ 23.5mm). It is more rarely due to a cornea that is too curved.
Myopia is often diagnosed young around 6 years old. The children read very closely, approach to look at the screens, squint their eyes to see in the distance... it often evolves until the age of 16 and stabilizes around 20-25 years . It can again evolve in women during pregnancy. Generally, the earlier it appears, the stronger it is. It varies according to environmental and hereditary factors.
Most often it affects both eyes and is little different between them.
It is often associated with astigmatism .
The word “ myope ” comes from the Greek muôps “who blinks to see better” and from the Latin myop, opis “who has low eyesight”.
Different degrees of myopia:
- From 0.25 to 3.00 diopters : low myopia
- From 3.25 to 6.75 diopters : medium myopia
- Above 7.00 diopters : high myopia
- Myopia greater than 20 diopters is rare.
The visual acuity of the myope is less than 10/10° with a Maximum sharpness distance at 5m . A myope of -0.50 diopters has an acuity of 5/10° and its maximum distance of clear vision is located at 2 m from its eye. That of a myope of -2.50 is 1/10° and its net viewing distance will be 40 cm from its eye . This distance will be all the closer as the myopia will be important. The highly myopic will have blurred vision beyond 10 cm , he cannot move around and practice his daily activities (sport, work, cooking, etc.) without being corrected.
From -0.50 diopters, driving is prohibited without correction ; wearing eyeglasses or contact lenses is compulsory without forgetting to have a pair of emergency glasses in your car!
Reading problems? What if it was presbyopia?
Presbyopia, what is it?
As we age, we all experience annoying changes in our vision:
- it becomes more difficult to concentrate
- it is more and more difficult to see clearly on close objects .
Which mask to use in 2021?
Depuis presque un an, le port du masque est devenu une normalité pour se protéger du coronavirus et maintenant de ses variants.
Face à la pénurie de masques, nombreux sont ceux qui se sont retournés vers leur machine à coudre pour en élaborer en suivant les "normes AFNOR" : pas de couture sagittale, 3 plis etc...
Puis progressivement sont arrivés les masques jetables, les lavables, les chirurgicaux, les FFP1, FFP2, UNS1, UNS2, cat1, cat2, KN95... tout un langage barbare pour le consommateur lambda !
