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The retina is a light sensitive layer located at the back of the eye and is used by near and far sighted people.The lens of the eye controls how images are projected onto the retina and this is what causes sight problems such as near and far sight.
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Where is the light focused when it enters your eye?
The retina
What part of the eye focuses the light that comes through the eye?
The answer to this question is the retina .......... It's the retina because everything is upside down, bends, goes up to the brain and flips it around........and that is why the light is always focused on the retina
How do concave lenses and convex lenses help improve vision?
If you are farsighted, meaning that you can see far but you can't see objects close up, that means your eye is too short in terms of the distance of your retina to your lens. The image focuses behind the retina, so it becomes blurry. When you add a convex lens, it will help bend the light more and converge the light rays onto the retina, so you will see the image clearly. If you are nearsighted, your retina is farther away from your lens, so the image is focusing in front of your retina, so you can't see distant objects. That's when you need a concave lens. Concave lens will diverge the light rays onto the retina.
What is the layer of photoreceptors?
the retina contains the rods and cones which sense the amount of light and different colors respectively.
If images focused on the retina are inverted how do you see the worl in its proper perspective?
You see objects because they reflect light rays. As light travels to your eyes, the lens focuses the image of the object on the retina. The image of the object in the retina is inverted. As the image is formed, the optic nerves send the message to the brain. It is the brain that interprets and corrects the inverted image into an upright position. - Science Links by Sugpatan, Parde and Apolinario
If images of distant objects are typically focused at a point in front of the retina?
The person will be nearsighted.
Where is the light focused when it enters your eye?
The retina
Where in the retina is the light focused in farsightedness?
Before the retina; in the vitreous humor.
What vision abnormality occurs when the light is focused behind the retina?
farsightedness
What happens if the light is focused behind or in front of the retina?
You will need glasses. If its focused in front of your retina then you're near-sighted (can't see close up). If its focused behind your retina then you're far-sighted (can't see far away)
What vision abnormality occurs when light is focused in front of the retina?
nearsightedness or myopia
How do eye glasses improve the sight of a nearsighted person?
They correct the path of the light entering the eye so that it will focus a sharp image on the retina.
How would you describe a nearsighted person?
The focal point is in front of the retina
If the eyeball is too long images are focused in front of the retina and the result is?
When the light actually reaches the retina the image is blurred (except when looking at close objects when the image is focused on the retina and looks clear. The condition is known as short-sightedness.
Use the word myopic in a sentence?
a condition of the eye in which parallel raysare focused in front of the retina, objects being seen distinctly only when near to the eye; nearsightedness
What is the primary function of the lens of the eye?
The lens focuses the light on the retina. If your lenses are too short, the light is focused in front of the retina, making you nearsighted (myopic). If your lenses are too long, the focal point is past the retina, making you farsighted. Most people need reading glasses eventually, even if their eyesight has been perfect, because with age the lens loses flexibility, which means it cannot shorten to accomodate close vision, so glasses are needed to correct this.
How would you describe a nearsighted person's eye?
A nearsighted person's eye is typically longer than average or has a cornea that is too steep. This causes light entering the eye to focus in front of the retina instead of directly on it, resulting in blurry distance vision. Nearsightedness can be corrected with glasses, contact lenses, or refractive surgery.
