How Do Contact Lenses Enhance Vision?
Understanding the eye
To understand how contact lenses work, you first need to understand a bit about the eye. At its most basic, light displays off an object and passes through the cornea, the transparent covering of the eye. Subsequent it travels to the pupil, the black a part of the eye, after which via the lens, which focuses the rays on the retina on the back of the eye.
The retina is crammed with things called rods and cones and these take the light and convert it to electrical impulses which are then despatched to the brain for processing. Whenever you get blurred vision, this is due to something called 'refractive errors' and is when the form of the eye stops the light reaching the retina directly and kpop2 leads to distortion.
Fixing these errors
So to fix these errors, we use a tiny plastic lens that corrects them by making a film that makes contact with the eye (therefore - contact lenses). They work in the identical way as glasses to focus the light on the retina and allow the eye to work properly. There are a number of different types of errors that leads to totally different problems and require different prescriptions to correct.
Myopia or close to-sightedness is where object far away appear blurred while objects close by appear clear. This happened when the light coming into the eye is not accurately targeted and is caused by the form of the eye. This is one of the most common circumstances and there are numerous contact lenses that right it.
Hyperopia or farsightedness is the opposite, the place gadgets close by are blurred however those further away are clear. Once more, this is comparatively frequent and there are many lenses to correct it.
Presbyopia is an age-associated condition much like hyperopia where gadgets close by become blurry however comes from a different cause. While hyperopia comes from the shape of the eye, presbyopia comes from the eye lens hardening with age. To appropriate the situation, multifocal lenses are often used as they will clear each the near and the far blurriness.
Finally, astigmatism is a situation where the irregular shape of the cornea or the lens stops the eye from focusing the light on the retina. A special category of lens is used to right this situation, called a toric contact lens. Often, an image of a ball can be used to visualise the different - a sphere lens is sort of a beach ball the place a toric lens is more like a rugby ball.
To understand how contact lenses work, you first need to understand a bit about the eye. At its most basic, light displays off an object and passes through the cornea, the transparent covering of the eye. Subsequent it travels to the pupil, the black a part of the eye, after which via the lens, which focuses the rays on the retina on the back of the eye.
The retina is crammed with things called rods and cones and these take the light and convert it to electrical impulses which are then despatched to the brain for processing. Whenever you get blurred vision, this is due to something called 'refractive errors' and is when the form of the eye stops the light reaching the retina directly and kpop2 leads to distortion.
Fixing these errors
So to fix these errors, we use a tiny plastic lens that corrects them by making a film that makes contact with the eye (therefore - contact lenses). They work in the identical way as glasses to focus the light on the retina and allow the eye to work properly. There are a number of different types of errors that leads to totally different problems and require different prescriptions to correct.
Myopia or close to-sightedness is where object far away appear blurred while objects close by appear clear. This happened when the light coming into the eye is not accurately targeted and is caused by the form of the eye. This is one of the most common circumstances and there are numerous contact lenses that right it.
Hyperopia or farsightedness is the opposite, the place gadgets close by are blurred however those further away are clear. Once more, this is comparatively frequent and there are many lenses to correct it.
Presbyopia is an age-associated condition much like hyperopia where gadgets close by become blurry however comes from a different cause. While hyperopia comes from the shape of the eye, presbyopia comes from the eye lens hardening with age. To appropriate the situation, multifocal lenses are often used as they will clear each the near and the far blurriness.
Finally, astigmatism is a situation where the irregular shape of the cornea or the lens stops the eye from focusing the light on the retina. A special category of lens is used to right this situation, called a toric contact lens. Often, an image of a ball can be used to visualise the different - a sphere lens is sort of a beach ball the place a toric lens is more like a rugby ball.
