Can methilphenidate cause hemmorage in the eyes What other things could be the cause of bleeding behind my retina in both eyes?
Methylphenidate has not been known to cause a hemorrhage behind the eyes. Something that can cause bleeding behind the retina in both your eyes is diabetes or a stroke of the eye.
what is the treatment to cure bleeding behind the retina
The choroid layer lies behind the retina and in front of the sclera. It carries oxygen and other necessary nourishment to the retina.
The retina is behind the eye The vitreous humor.
See this question: http://wiki.answers.com/Q/What_causes_bleeding_behind_the_eye
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)
When the image focuses (falls) behind the retina
behind the retina
You mean at the back of the eye, not behind it? If so, retina
The retina is a very thin layer of cells lining the back of the eye behind the viscous humor. This is where the cells that convert light to neural impulses are; without the retina, you would be blind.
For people who are farsighted, images come into focus behind the retina; for people who are nearsighted, images come into focus in front of the retina.
Osmotic vacuum behind it
it pasess up your behind then up your mouth into your eyes
Farsightedness NOT nearsightedness
back of the eye behind the viscous humor
incidence parrell rays come to a focus behind the retina
A clear thing behind the Iris but befor the Retina
the aqueous humor the iris & pupil the lens the vitreous humor the retina
There are many reasons one might bleed behind the eye. First you might have Diabetic Retinopathy, which is a condition that interferes with the body's ability to use and store sugar. Over time, Diabetes may cause weakening of the small blood vessels found in the retina. These blood vessel changes are called Diabetic Retinopathy. Early stages of this cause Background Retinopathy,' causing small hemorrhages to form throughout the retina the more progressive this gets the… Read More
Eyeglasses improve your vision by focusing the image directly onto your retina. In order to see perfectly, the image has to be focused on your retina. Nearsightedness is when the image you're looking at is focused in front of the retina. A concave lens can correct nearsightedness. Farsightedness is when the image is focused behind the retina. A convex lens can correct this.
Tapetum Lucidum , at least i give the answer..
It actually depends on the lens. For the image to be sharp on the retina, all the rays of light coming off the object must meet together at the same point on the retina. If the rays of light meet somewhere in front of the retina, the lens focuses by stretching itself and becoming thinner. This spreads out the rays of light, making them go further into the eye until they reach the middle of… Read More
Convex lenses cause the focal point to appear behind the lens (positive convergence). In myopia, the focal point lies somewhere between the lens and the retina, it needs to converge at a point farther than it is converging, this is why a convex lens is used, to push the focal point back so it will hit the retina. A concave lens would do the opposite for hyperopia (the focal point appears behind the retina), it… Read More
The tapetum helps them see at night. It is behind the retina. When light goes through the retina, it strikes the tapetum and passes back through the retina, illuminating the image on the retina a second time. This is why it looks like their eyes glow when light hits them at night. The light is escaping out through the pupil.
because the vitreous of the eye tends to pull away from the back of the eye as we get older. sometimes it pulls too hard and pulls the retina. fluid can get behind the tears in the retina causing it to pull away such as wallpaper pulls off the wall when it gets wet.
its from the little amount of light reflecting off the retna You mean retina? Just for the record, the "glow" come from a reflective layer behind the retina. The eyes themselves don't glow.
The noun 'retina' is a common noun, a general word for a part of an eye structure, a part of any eye of anything. A proper noun is the name of a specific person, place, or thing; for example: Leon A. Bynoe MD, Coral Springs FL, member of the American Society of Retina Specialists Hudson Retina (medical practice), Poughkeepsie, NY "Reflections Behind The Retina" by USA, Ret. CWS John Guzman
The retina is a portion of the back of the eye. Sometimes there is uneven pigmentation. It is nothing to worry about medically.
The condition where the point of focus of parallel light rays from an object is behind the retina is called hyperopia
They see well in twilight because of the tapetum lucidum behind the retina.
Hypermetertropia is refractive condition inwhich with accomodation relaxed light rays converge at a point behind d retina.
Both are common eye problems solved with glasses or contacts. Nearsightedness is called myopia, and farsightedness is known as hyperopia. The main biological difference in the two is that in myopia, the images seen are focused in front of the retina, rather than directly on the retina. In hyperopia, the images are focused behind the retina, rather than on top of it.
The tapetum lucidum is a layer of tissue in the eye of many vertebrates. It is located immediately behind the retina and it reflects visible light back through the retina, increasing the light available. In raccoons the eye shine is yellow.
tapetum lucidum-a layer of tissue in the eye of many vertebrate animals, that lies immediately behind or sometimes within the retina. It reflects visible light back through the retina, increasing the light available to the photoreceptors.
Retinal hemorrhage is a disorder of the eye in which bleeding occurs into the light sensitive tissue on the back wall of the eye. by mybreezylife.com
These are pupils, spaces behind the lenses that allow light to enter and pro0ject images on the retina. What you see is in those images.
A layer of tissue behind the retina reflects light, causing to pass again through the retina which helps improve night vision for the raccoon. The eye shine of a raccoon is bright yellow.
There are many things that can cause someone to go blind. I'm completely blind in my eye. It could be because of a vessel behind the eye that popped. I'm not an eye doctor so I'm unsure about this one. Most common and most important cause is Diabetic Retinopathy. It occurs in long standing diabetics- controlled or uncontrolled. That is why diabetics are advised yearly retina check up. Eye complications of hypertension and severe eye… Read More
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… Read More
"Blonde retina" refers to there being light pigmentation (as opposed to darker pigmentation) of the tissue behind the retina. People with blonde retinas sometimes complain of photosensitivity, as do some people with blue eyes and/or an astigmatism. As a person with that trifecta (blonde retinas, blue eyes, and an astigmatism), I find myself always taking efforts to avoid bright light, facing the sun, etc.
Tigers, as with all cats, have a reflective layer behind the retina. This allows them to use the light twice in the retina, making it much easier to see at night. When cat's eyes appear to glow, you are seeing the escaping reflected light from this surface.
symptoms that affect the whole body (systemic symptoms), such as fever; swelling of the face and the area around the eyes; rash; bleeding into the nail beds, retina, and whites of the eyes; and cough.
The pupil is an opening into the center of the eyeball, where the retina (visual receptor layer) is located. The pupil is located in the front center of the eyeball, and its size (aperture) is controlled by the iris or colored part of the eye. The pupil is just behind the cornea, or lens, that focuses light on the interior surface of the eye (the retina).
Unlike humans, cats have something called tapetum lucidum, which is a reflective layer behind the retina that sends light that passes through the retina back into the eye. This makes it easier for them to see in the dark. But, because of this, this makes it harder for them to see in light than humans.
The pupil is a hole, there isn't a clear curved membrane begind it. The rertina is curved, however the retina isn't clear.
Rods are the sensory device that detects the illumination. They are over the whole width of the retina. In some animals such as cats, they have a special reflective layer behind the retina so that the sensors have a second go at the light. This feature, and the size of their pupil means that cat's night vision is about six times more sensitive than humans. (But they don't see colour as well as humans.)
Such lenses are used for refracting and focusing light. One such use would be eyeglasses. If the eye is too long and the sharpest point of the light tries to focus in front of the retina, and the person cannot see well in the distance, a concave lense can be used to move that point onto the retina and improve vision. If the eye is too short and the person has trouble seeing up close… Read More
The eye changes the shape of its lens to focus light on the retina depending on the distance between the eye and the object being viewed. The shape of the lens is altered by two muscles, the ciliary muscles and the suspensory muscles To focus on an object nearby: the ciliary muscles contracts the suspensory muscles slacken the lens bulges light rays are refracted more to fall on the retina instead of behind it To… Read More