Well, before we answer this query, we need to learn more about the eye. When you gain a proper understanding of human eye, it will be easier for you to decode the mystery.
Learning more about the eye
Before we explore how contact lenses work, let’s dwell on the topic of the human eye first. If you wish to know the basic concept, then this is what happens – light which reflects off on a particular object passes through the cornea, the pupil and finally the lens. The black portion of the eye is named pupil and the covering of the eye is named cornea, which is transparent. As for the lens, it focuses the rays in the retina.
The retina is known to be filled with cones and rods. And their duty is to convert the light into an electrical impulse. Now it’s time for your brain to process this information. So what goes wrong when you get blurred vision? Well, it’s the result of something named ‘refractive errors’. Here the shape of the eye comes in the way of letting light reach the retina.
Contact lens to fix those errors
We can fix the aforementioned errors with the help of a contact lens. Usually, we use a small plastic lens which in turn creates a film. Since this film comes in contact with the eye, it is referred to as contact lens. We can see that the functioning of a contact lens can be compared to glasses. Different types of errors make way for different complications. You can buy contact lenses without prescription as well. Contact4Us is a fine brand which provides contact lenses without a prescription.
We will see the case of Myopia next. Myopia is also referred to as near-sightedness. When you have this condition you will be able to see the object close by in a clear manner and faraway objects will appear blurred. What leads to such a scenario? As we have already mentioned, the shape of the eye plays a role as it affects the light enter the eye. Light is not properly focused here in this case. It has to be one of the most common conditions which can be addressed with the help of a contact lens.
This condition is also referred to as farsightedness. It’s the opposite of near-sightedness as the name indicates. Objects in the distance will be clearer whereas the ones in close proximity will be blurred when you have this condition. Just as in the case of near-sightedness, it is a common condition. You can get it fixed with the help of a good contact lens.
This is an age-related condition, just as in the case of hyperopia. Objects in close proximity will look blurry.But it happens due to a different reason here. As we have already discussed, the shape of the eye plays a part in the case of presbyopia whereas hardening of eye lens due to aging is what causes presbyopia. How can we get it fixed? You can get it fixed with the help of multifocal lenses. This way, you will be able to deal with far and near blurriness.
Now let’s learn more about the condition named Astigmatism. It is caused by the irregular shape of the lens or cornea. This condition stops the eyes from focusing the light. In order to deal with this condition, you need special lens named toric contact lens. We can take the example of a ball to differentiate the lens. You can compare the sphere lens with a beach ball whereas a rugby ball can be compared to a toric lens. Different types of toric lenses are out there – the BiofinityToric lens is an example.
Contact lenses are not a new phenomenon. It has been around for a very long time. The very first contact lens was introduced in 1801. But today, contact lenses have become advanced. It has become convenient to use contact lenses today. It is available for all sorts of conditions.
There are many good contact lens brands in the business today. Contact4Us is a very good brand. They are known for the quality. They offer contact lens without prescription.
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About The Author:
Stacey Smith is the freelance health writer. She is passionate to write about women’s health, dental health, diabetes, endocrinology and nutrition and provide in-depth features on the latest in health news for medical clinics and health magazines.