Refractive Eye Surgery Essay

Ocular Lens - The ocular lens is the lens you look in closet too your eyes. It helps magnify the specimen as well.

The part of the eye responsible for refracting light in a way that allows an image to be created on your retina is the cornea. However, any imperfections in the shape of the cornea can cause blurry images to be created. LASIK surgery is a procedure that uses a laser to remove some of the corneal tissue, reshape the eye, and permanently fix these imperfections.

This is when the angle between the iris and the cornea is too small resulting in the aqueous fluid pressure building and pushing the iris forward blocking the trabecular meshwork causing increased intraocular pressures. This laser treatment helps open up the angle to increase fluid outflow and lower the eye pressure. It is also a preventative measure so patients with narrow angle glaucoma do not develop acute narrow angle glaucoma attacks. These attacks present with pain, high intraocular pressure and loss of vision within a couple of days if left untreated. During LPI a laser beam makes a very minute hole in the superior periphery of the iris, which is the coloured part of the eye and helps to open up the narrow angle enabling the aqueous humor to flow forward through the new hole in the iris. This lasers end result is balancing the pressure between the posterior and anterior chambers and letting the iris go back to a more plantar position taking pressure off the trabecular

Eye tests usually consist of visual acuity test, which includes Snellen chart reading ( (you are supposed to read letters of different sizes, from largest in the top to smallest in the bottom line). Afterwards, more profound tests are performed, so that problem’s severity can be thoroughly observed. In accordance with results, corrective lenses will be prescribed. During eye testing, optometrist will be evaluating all three aspects of your

The eye is the organ of sight. We use this organ in practically everything we do on a daily basis, from reading books, documents, and the website to driving a car and watching TV. A normal and well-functioning eye can focus on objects and images, both near and far away, perceive depth and adapt to changes in light. For those who are categorized to have 20/20 vision means that at 20-foot distance a person is capable of seeing more than the average eye is able to see at that distance. For example, 20/20 vision can clearly see letters. Unfortunately, most people in today’s society are less likely to have 20/20 vision due to several eye disorders such as nearsightedness, farsightedness, and astigmatism. Nearsightedness or Farsightedness occurs

Sub-Point One: When preforming the surgery the surgeon will create a thin flap in the cornea using either a

Astigmatism is often a result of a bent cornea. There are two types of astigmatism, regular and irregular. The most common type, regular astigmatism, does not usually progress beyond 2-3 dioptres and can be controlled with spectacle lenses. Irregular astigmatism is a result of disease or injury to the cornea and is controlled with contact

According to one report, over 34 million people around the globe have had laser eye survey. Refractive laser eye surgery, or Lasik, is an innovate procedure that can correct common vision problems. Lasik surgery is a quick and painless procedure which improves vision quality. As a result, patients no longer need contacts or glasses. In fact, the Federal Trade Commission (FTC) reports that lasik surgeries are 90 percent successful. The remiaining 10 percent of patients who need retreatment is due to major, preexisting problems. Below introduces four eye conditions that Lasik can easily fix.

Because of the advancement in technologies in every arena, there are many innovative ways with which the ophthalmologists can now implement curative surgeries of the eye. Laser surgery is one of the newest types of ophthalmic surgery, which countless patients now opt for. This process will let you get up in the morning without reaching for glasses or having to put in contacts. The doctor will flip back the cornea and use a laser to throw out any additional tissue that could be barricading your view. Then, once the surgeon is content that your vision is

The placement of the eye itself allows us to see length, depth, width, and distance of any object. The eye is made up of three layers. The layers in particular are; the sclera, choroid, and the retina. Deriving from website source, The sclera is a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball. The choroid is like the chorion; membranous. The retina is the innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve,and consists of several layers, one of which contains the rods and cones that are sensitive to light. The sclera also maintains the shape of the eye. The sclera has muscles attached to it that controls the movement

Most of patients are hoping to see well without spectacle or contact lenses. So in last years the refractive surgery increased in patients dissatisfied with spectacles and contact lenses either due to quality of vision, cosmetic appearance or difficulties in contact lenses wearing and its complications. corneal surgeries like corneal ablation ( photorefractive keratectomy (PRK) and laser-assisted in situ keratomileusis LASIK) and different types of phakic intraocular lens (PIOL) implantation either in the anterior or posterior chamber and the anterior chamber either iris claw or angle fixation IOL aim to correct s refractive errors in myopic patients [1,2].

Laser-assisted in situ Keratomileusis (LASIK) eye surgery is a popular form of elective out-patient surgery that enables individuals with poor eyesight to recover improved vision, ideally, so that they can discard their glasses and contact lenses altogether (Hellemans & Bunch, 2006). In principle, LASIK consists of a procedure in which a laser is used to reshape the lens of the eye. It works because the majority of cases of poor vision result from refractive problems, meaning that the corneal lens of the eye fails to focus light properly onto the retina to enable clear vision. Generally, this is caused by advancing age because the cornea becomes less elastic, or by misshapen eyeballs that do not allow the cornea to form the correct shape for optimal light refraction and vision (Hellemans & Bunch, 2006). In most cases, LASIK provides dramatically improved vision for the patient with a minimum of discomfort. However, there are potential side effects and complications, some of which can leave patients worse off than before they sought refractive eye surgery (Sutton & Kim, 2010).

Examining inside the tiny window of a living eye help us to fully understand the many parts of an eye, and how it functions. Museum of Vision describes how light enters the eye when it bounces off an object creates an image. Only a small amount of image can be seen because the eye has only a tiny window opening. But with the ability to move the eyes, it gives the mind a broader picture. The eyes picks up on the highlighted edges of an object. The light continues to pass through the pupil, making it dilate and the image more focused. Moving towards the back of the eye, a layer that contains cells sensitive to light is called the retina. Cones and rods are cells that sit on the retinas outer layer and absorb distinct bundles of energy. Cones help one perceive color and detail, while rods show black, lights, and whites. Colors make the distinguishing differences in objects when lighting is not enough for the brain. The use of shadows gives one the ability to see 3D.The retina takes that image and makes it appear upside-down and backwards. These lighted cells flip, process the image, and send the information through

The human eye is an organ that reacts to light and has several purposes. As a conscious sense organ, the eye allows vision. Rods and cones in the retina allow light perception and vision including color differentiation and the conscious perception of depth. The human eye can distinguish 10 million colors. The eye is composed of three layers, enclosing three transparent structures .

The process happens so the light that passes through can refocus on the retina in the back of the eye which is another important reason our eyes work the way they do. The retina in the eye is a thin layer of tissue in the back of the eye that has millions of light-sensing nerve cells that are called rods and cones that help us see. The cones are located in the center of the eye that provides clear, sharp central vision in bright light conditions. The rods are located on the outside of the macula right next to the cones which provide us with side vision and peripheral vision. The rods allow us to see dim light at night, and detect when things are in motion. We use need rods and cones to be able to see the objects we see every day. Last but not least, the optic nerve, right next to your blind spot sends what we like to call messages to the brain where the images we see are produced. Listed below is a diagram of the eye to help you better understand where the locations of everything are.