Myopia ( Nearsightedness ) Is A Common Vision Condition

As a person ages, the constant need to accommodate when looking at nearby objects such as in reading or doing close-up work becomes more difficult (Goldstein, 2014). The main reason a person may experience the need for a brighter light when they get older is a result of a condition called presbyopia, also referred to as "old eye" (Goldstein, 2014). Old eye describes when the distance of the near point increases as a person ages. According to Goldstein (2014), "The near point for most 20-year-olds is at about 10 cm, but it increases to 14 cm by age 30, 22 cm at 40, and 100 cm at 60" (p. 25). Generally, this change occurs because the lens hardens with age and the ciliary muscles in the eye become weaker, causing great difficulty in vision when looking at objects in close range (Goldstein, 2014).

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There are three types of eye conditions, the nearsighted, farsighted and astigmatism. So first let us know the nearsighted or (myopia), basically means that people who are nearsighted they can’t clearly see a text or a thing that is too far from them and they need to move closer in that certain area, nearsighted people usually experiencing blur vision when they are far well they can read it but then the text itself will turn into a blur one. It can be a common cause of having a blur vision. So here is a sample picture of myopia.

Amblyopia is also known as the lazy eye, and it is when one or both of the eyes do not develop correctly. When children are born they do not have good vision they develop their vision through their early years of life usually from birth to six years of age. This disease affects around 4% of children in the world.

When someone has nearsightedness, or myopia, their eye is too long depthwise. This causes the image to focus in front of the retina instead of at the retina causing a blurry image when the object is far away. Using contact lenses causes the light to refract before hitting the eye lens to refract again. The lens is used to refract the light in such a way that when the light is refracted by the eye, the image will be formed at the retina.

Amblyopia is a condition in which visual acuity in one eye is greatly reduced. It is caused by lack of stimulation or disuse during visual development (Rose, 1998). Because the eye is not fully developed at birth (Jarvis, 1992, as cited in Rose, 1998), infants need stimulation to complete the visual neural pathway. When one or both eyes are inhibited, for example due to misalignment of one eye (strabismus) or a large difference in refractive power between two eyes (anisometropia), the neural pathway for the inhibited eye develops abnormally, or does not develop at all. At

Currently, the treatment option chosen was to fully correct any uncorrected refractive error, and then to prescribe a near add1,2. The full distance refraction was prescribed to eliminate her distance blur. At near, an add was prescribed as a supportive lens to relieve the accommodative demand placed on her visual system when undergoing near viewing2. It also decreases the extent of blur on the retina to a degree that it

Typically, a word that those without an ophthalmologist’s educational background wouldn’t pay much attention to. For me, the word amblyopia makes every single experience in my life vastly different. When I was very young, about 2 years old, I was diagnosed with Amblyopia with Strabismus. Amblyopia with Strabismus is a disorder affecting the quality of vision as well as the alignment of the eyes in approximately 2 to 3 percent of the world. After countless ventures to my eye doctor and hundreds of tests, it was found that I had 20/2400 vision, making me legally blind in my left eye with perfect vision in my right. This left me with a severely lacking depth perception and the inability to catch or throw practically anything.

The fluctuations may be myopic or hyperopic in association with hyperglycemia Refractive shifts often occur as a symptom

Presbyopia is another common eye problem associated with aging eyes. With this condition, it gets harder and harder for you to see things up close. Reading glasses help because they magnify near vision. However, you don't wear them all the time because you can't see things far away with them on. That's why bifocals are usually the treatment of choice for presbyopia if you have to wear glasses all the time. That way you can see far away and up close too.

People who can see nearby objects clearly but cannot see or focus on distant objects are near sighted. This problem occurs because the lens converges the light rays to form an image in front of the retina, and by the time the light rays strike the retina the light have rays have begun spreading out again, which leads to blurry vision, and difficulty to see distant objects. A concave lens is used to diverge parallel rays enough for images to form further back, on the retina.

Low vision – is used to describe a loss of visual acuity while retaining some of one’s vision. It is when a person is unable to read a newspaper at a normal distance, even with the use of glasses. Students with this type of impairment may use large print or able to adjust the light to assist.

Convergence is the centering of both eyes on the same visual field. One type of convergence disorder is convergence insufficiency. Convergence insufficiency is the main reason for eye strain, blurred vision, and also headaches. This disorder is a near vision problem that interferes with a person's ability to see, read, learn, and work at near distances. This insufficiency goes undetected most of the time, but there are treatments for it. Treatments range from prism lenses to office based vision therapy, the latter being the most successful. Home based pencil push ups therapy is the most commonly prescribed. Sometimes eye surgery recommended although not very often.

The eyelids are made up of four layers, the skin, muscle, connective tissue and conjunctiva. The process of vision occurs when light waves from an object, enter through the iris. Light then passes through the lens of the eye, a double convex structure that is used to focus the light, and then reaches the retina. Inside the retina are rods and cones. Rods are used to sense light and dark, and cones are used for sensing colors. Whether the light entering the eye hits the cones or rods, a signal is sent across the optic nerve to the brain where it is processed and viewed as an image. Some issues people have with eyesight are as follows. Those who are farsighted are unable to see things clearly at a short distance, compared to a long distance. This occurs when the light that enters the eye is focused behind the retina, and not directly onto it. When the cornea is not curved enough, this happens. Nearsightedness is when one can see objects clear at a short distance, but not at a longer distance, and this is often caused by a change in the cornea. A Blind spot is the location the optic disk, where the optic nerve fiber exits, and at this location there are no cones or rods, so there is a blind spot.

We can tolerate very large scars on our bodies with no concern except for our health. This is not so in the cornea. Even a minor scar or irregularity in the shape can impair vision. No matter how well the rest of the eye is functioning, if the cornea is scarred, clouded or distorted, vision will be affected. This can be caused from any sort of retinal degenerative disease like macular degeneration. This is when the front-end cells die, the photoreceptors die, and over time, all the cells and the circuits that are connected to them, they die too. Until the only things that you have left are these cells here, the output cells, the ones that send the signals to the brain, but because of all that degeneration they aren 't sending any signals anymore. They aren 't getting any input, so the person 's brain no longer gets any visual information, thus causing blindness. These diseases can be genetic but can be caused accidents.