According to Mayoclinic.org the definition of cataract is a clouding of the normally clear lens of your eye (July 2013). I would like to discuss with you the pathophysiology of this disorder, the causes of this issue as well as some of the effects it can have on you, and some treatment options for those you suffer from this internal eye disorder. A cataract affects the lens of the eye. The lens is generally clear in color, and it is elastic in nature. The lens is surrounded by a capsule like case and sits behind the iris inside the eye (“Cataracts” Linton 2012). When the lens of the eye becomes cloudy, blurred, or there seems to be a more dim vision which replaces the normal transparency, this is called a cataract (“Cataracts” Linton 2012). …show more content…
Cataracts can be caused from a traumatic event or simply because of degeneration related to becoming older in age. The lens of the eye may become cloudy or hard to see through at a slow rate of time or very quickly (“Cataracts” Linton 2012). Some reasons for the disorder are a contributing factor to the speed in which a cataract forms. Also, each individual is unique in that they all react to illness, trauma, or even congenital disorders differently. Some signs and symptoms of cataracts are clouded, blurred vision, increased difficulty seeing or driving at night, new or worsening sensitivity to light and or glare, seeing orbs of light or what some individuals call “halos” around lights, having to obtain and fill multiple eyeglass or contact lens prescriptions, when the whites of a persons …show more content…
Definitely, if you develop a sudden change in your vision, sometimes double vision or blurred vision (Mayoclinic.org 2013). There are different locations of cataracts therefore they have names based on their location. According to “Cataracts” Linton 2012, a central cataract is located in the center of the lens (nuclear cataract) and in this case the patients may still be able to use their peripheral vision just as they always have, they just tend to start to lose vision directly in the center of their eye. The second type of cataract, according to “Cataracts: Linton 2012 is the peripheral cataract (cortical cataract) where an individual can see straight ahead but cannot see out of either of their peripheries. There are cataracts that affect the back of the lens (posterior subcapsular cataract) in which the cloudy spot on the lens forms directly over the small area where the path of light shines on the retina. This type of cataract interferes with reading vision, distracts us and hurts our eyes when we are in bright sun light, and happens to case the “halos” that some people say they are seeing (Mayoclinic.org 2013; “Cataracts” Linton
They say that the eyes are the windows into the soul. When damage to the eyes occur it is usually irreversible, meaning that if this does occur, it is definitely best to find a respected ophthalmologist to fix the problem. Meet Karen D. Todd, my aunt and opthamologist at the Florida Eye Institute in Vero Beach, Florida. Dr. Todd practices general ophthalmology with an emphasis on the latest treatments and diagnostic testing for glaucoma.
Myopia is defined as nearsightedness, which exists when the refractive elements of the eye (cornea and lens) place the image in front of the retina. The myopic condition is common in infants but generally levels off to normal vision as the infant ages (Vander & Gault, 1998). Myopia occurs in about 25% of the adult U.S. population. Many adults use corrective lenses or contacts to correct their myopic vision to 20/20 vision (Drexler et al., 1998). Many people find contacts or glasses hindering in their personal and/or professional lifestyle. For example, military pilots cannot wear glasses while flying and some firemen may find glasses too dangerous to wear during a rescue attempt. There is refractive surgery available to correct myopic eyes, like Photorefractive Keratectomy (PRK). Why do people have myopia, what can be done to correct myopia, and what are the results of corrective surgical procedures? These are a few questions that will be addressed and analyzed.
Glaucoma is a disease of the eye and it is fluid pressure within the eye rises and if the eye is left untreated the patient might lose vision or maybe even blind. But this disease is generally affects both eyes but although one of their eyes may have more severe signs or symptoms then the other eye. When you have glaucoma there are small spaces in the front of the eye and they are called anterior chamber. There is clear liquid that flows in and out of the anterior chamber and the fluid nourishes and bathes nearby the tissues. And if the patient has glaucoma the fluid dose not drain like it should drain but the fluid drains out of the eye. And this may lead to fluid build up and pressure inside the rises of the eye. Unless the pressure is brought down and controlled and the optic nerves and some of the other parts of the eye might become damaged leading to ...
Glaucoma, one of the leading causes of blindness, is estimated to affect 1 of every 50 adults. Although glaucoma can occur at any age, the risk of developing the disease increases dramatically after the age of 35. Glaucoma is also more likely to develop in patients who are severely nearsighted, have a family history of the condition, diabetics and Black or African American. This disease often goes unnoticed until permanent vision loss has occurred. Visual damage from glaucoma can be prevented by early diagnosis and careful treatment. Glaucoma is related to elevated fluid pressure of the eye which is causing loss of side vision. It is a series of diseases which damage the optic nerve. Damage to the optic nerve and retina causes blind spots in the field of vision. When the entire nerve is destroyed, blindness will occur. Glaucoma is usually caused by an increase in the fluid pressure in the eye. The front part of the eye contains a clear, nourishing fluid called aqueous which constantly circulates through the eye. Normally, this fluid leaves the eye through a drainage system and returns to the blood stream. Glaucoma occurs from an overproduction of fluid or when the drainage system becomes blocked, causing fluid pressure to increase. The high pressure causes damage to the optic nerve, resulting in permanent vision loss. The exact reason the fluid system in the eye stops functioning properly is not completely understood
Retinitis pigmentosa is caused by damage to the retina of the eye. The retina is the light sensitive layer of tissue at the back of the eye. The retina focuses images in the brain and then sends them via electrical signals up to the brain. The retina is a very important part of the eye to help a person see. What is affected in the retina from this disorder are the rods in the eye. The rods allow a person to see in the dark. Retinitis pigmentosa slowly causes the rods in the eye to deteriorate over time. Retinitis pigmentosa also can cause the cones in people’s eyes to deteriorate. If a person’s cones deteriorate first, then the person first develops blindness in the center of their eye and they lose some of their color vision. This form of retinitis pigmentosa is much rarer than the form that deteriorates the rods in the eyes.
The high percentages of individuals who endure this impairment justifies and practically demands future research because the causes are not fully understood. The need for future research can be better emphasized if those with normal vision try to empathize with victims of macular degeneration. One can only imagine how frustrating it must be to receive sensatrions only in the periphery of the retina. Because the macula encompassed the cone rich fovea, which is used to focus on objects, the fovea degenerates as well. This occurence inables individuals to interpret the sensations they experience. Reading, ...
Partial. Partial retinal detachment is when only a part of the retina detaches from the back of the eye. A partial detachment usually causes some loss of side vision. Side vision is what you see just off to the side of what you are looking at. Rarely, it causes some loss of central vision. Central vision is what you see when you are looking at something. It is also what allows you to see focused, detailed images and color.
Many signs include a "white pupil," also known as leukocoria. Retinoblastoma can occur in either one or two eyes (Paul T. Finger, Pg. 1). This abnormal white pupillary reflex is sometimes referred to as a cat's eye reflex. Another sign of retinoblastoma is a crossed eye (Ambramson, Ch3). Leukocoria doesn't always end up as being retinoblastoma, it can even result in: congenital cataract, Toxocara canis, Coat's disease, and persistent hypertrophic primary vitreous (PHPV) (Finger, Pg.2). Retinoblastoma occurs when there's a mutation or deletion of the q14 band of chromosome 13 (Finger, Pg. 1). Symptoms can be painful if not treated quickly. Some include a red, painful eye, swelling of the surrounding eye, poor vision, dilated pupil, even extra fingers or toes, and retardation (Ambramson, Ch3).
Glaucoma is the build-up of fluid pressure inside a person's eye. The effects of this fluid build-up depend on which of the two types of glaucoma a person has; open angle or closed angle glaucoma. With both glaucoma's, the anterior chamber is the space between the cornea and lens that is used as a passageway for fluid to flow through and deliver nutrients. However, with glaucoma, the absorbing ability of the anterior chamber wall is damaged, causing this liquid to begin to build-up in the anterior chamber. This pressure can damage the optic nerve, which results in "the progressive retrograde degeneration of axons and the death of retinal ganglion cells"(Mesentier-Louro et al. 2014, Introduction, para.1). These retinal ganglion cells receive
Color depends on how much of the pigment melanin you have in the color part of your eyes. The more pigment the darker the eye color. The lighter the color is because of the less amount of melanin there is in the iris. Cataracts are the clouding of the lens that prevents light from entering. Double vision, decrease in vision, fuzziness, and blurriness could all be problems when bright light occurs. Causes of cataracts could be from smoking, diabetes and also excessive exposure to light. The function or purpose of the retina is to receive the light that the lens captures, turn the color of the light seen into neuro signals and send those signals to the brain for recognition. This is knowing the difference between light and dark. Floaters are
Macular degeneration in general can affect many people in minor or drastic ways. People who experience this form often complain of vision loss when they are in dim light, especially when they are reading. The "dry" type is often characterized by a more gradual loss of vision compared to the "wet" type. Signs of this disease include an increase in drusen, which is an accumulation of a yellow-white substance, in the underside of the macular retina. A loss of cells can be seen in the macula. The macula is our sensitive sight region, where intricate detail can be seen. Thus, vision in this area is helpful and necessary to drive, read, focus on small details, and recognize familiar faces. The macula is located in the back of the eye known as the retina. The macula is only about 5 mm in diameter, and includes the fovea, which gives us our detailed central vision. If a person suffers from the "dry" form in one eye they will be more likely to develop it in the other eye as well.
Ever since I was in the 3rd grade, I had to wear glasses. I was diagnosed with astigmatism in both eyes. What exactly is astigmatism? Well, in a perfectly-shaped eye, the cornea, or surface layer, is a sphere, like a baseball. It allows light to enter your eyes at the right angle and focus just so on the retina. That means your vision is sharp and crisp. With astigmatism, the cornea shape is more like a football than a baseball. This irregularity makes the light rays focus on two points on the retina, not one. This causes blurry, distorted vision. Eyewear is a huge part of my life. Without my glasses or contacts, I am unable to perform at my best. If I have dry eyes because of my contact lenses, “like many contact users after the end of the day,”(Best), it unables me to accomplish certain tasks. Also, without the proper eye care, I could suffer an infection just as “William Spadafora, who suffered from a nasty fungal infection called, Fusarium,”(Kennedy). In certain states, the prescribing practitioner is required to give one their eyewear prescription.