Astigmatism :
Astigmatism describes the shape of the cornea as being oval instead of a sphere.
Most Astigmatic Corneas have two types of curves. The curves are considered to be a steep curve as well as a flat curve. The presence of these two types of cornea curves causes light to focus on more than one point with in the eye. For this reason, Astigmatism can blur both near and far vision. Astigmatism often occurs along with nearsightedness or farsightedness. There are two common types of Astigmatism. When the cornea has a distorted shape, it is called Corneal Astigmatism. When the lens is distorted, it is called Lenticular Astigmatism. Either type of Astigmatism can cause blurred vision.

Astigmatism can be detected and measured with Corneal Topography, Keratometry, vision testing and refraction. Astigmatism tends to remain constant, neither improving nor deteriorating much over time. Astigmatism can be corrected with glasses, contacts, or a variety of surgical procedures. The most common surgeries used to correct Astigmatism are Astigmatic Keratotomy and LASIK. These procedures reshape the cornea so it becomes more spherical.

Cataract :
A Cataract is a clouding of the eyes natural lens. The eye’s lens focuses light in order to produce clear images for the brain can interpret the images.
The lens is held within a sealed bag or capsule inside of the eye just behind the iris. As cells become old and die, they become trapped within the capsule or lens covering. As time passes and more and more cells die and become trapped the dead cells accumulate causing the lens to cloud. This clouding known as Cataracts causes images to look blurred or fuzzy. For most people, Cataracts are a natural result of aging; however certain other eye conditions can speed up the accumulation of dead cells upon the eye lens.

If you are suffering from the blurred or limited vision caused by Cataracts there have been many advancements to the Cataract Surgery that can provide much hope. After the Cataract is removed, an intraocular lens is required to replace the focusing power of the natural lens. The intraocular lens implant provides clearest vision at a single focal distance, whether the distance is far or near. As a result, patients that have undergone Cataract Surgery will require the use of glasses to see near or far distances clearly depending on the focal distance of the intraocular lens. The need for glasses can be reduced with Monovision. With Monovision, one intraocular lens is focused for near vision and the other for distances. Over time, the brain becomes accustom to interpreting the clearest vision depending on distance. Monovision can therefore eliminate the need for glasses. Cataract Surgeries are now being performed using only very small incisions that do not require stitches. Consult with your doctor on the various surgical solutions to the eye condition known as Cataracts.

Diplopia :
The leading cause of Diplopia or Double Vision is Convergence Insufficiency.
Diplopia occurs when the eyes are not aimed at the same target. The slight eye turn found in Diplopia the patient in many instances will report seeing everything twice, “Double Vision”. Convergence Insufficiency is an eye muscle condition in which the eyes do not cross or converge when looking upon an object at close range, thus causing difficulty seeing things close up. Convergence Insufficiency is the leading cause of eyestrain, blurry vision, Diplopia (Double Vision), and/or headaches. Consult with a doctor for more information regarding Diplopia and/or Convergence Insufficiency as well as diagnosis and treatment options.

Glaucoma :
Glaucoma is a very broad term for a certain pattern of damage to the optic nerve.
The optic nerve is a bundle of nerve fibers that carries information from the eye to the brain. In most cases of Glaucoma the pattern of damage to the optic nerve happens in the presence of high intraocular pressure; however, Glaucoma can occur with normal or even below-normal eye pressure. Pressure in the eye is caused by a build up of aqueous humor (fluid found in and around the eye). Aqueous humor is produced by a gland called the ciliary body. The aqueous humor should continuously drain through trabecular meshwork; however the trabecular meshwork can become clogged inhibiting the eye from draining properly. A clogged trabecular meshwork and resulting high pressure in the eye can be the result of any one of a variety of eye diseases and conditions. As pressure builds within the eye, the eye starts to warp and become misshaped at its weakest point. This point is in the sclera where the optic nerve leaves the eye. Glaucoma or damage to the optical nerve causes permanent visual loss. Consult with a doctor for diagnosis and treatment options. Early diagnosis and treatment of Glaucoma can result reduced risk of permanent visual loss.

Hyperopia :
Hyperopia or Farsightedness is a common vision problem affecting many people. People with Hyperopia can see objects at far distances very well, but these same people have trouble seeing the same objects when they are at close distances.
Farsighted people sometimes have headaches caused by eyestrain, and will also squint or feel fatigued during and after performing work at close distances. This vision problem occurs when light rays entering the eye focus behind the retina, rather than directly on it. The eyeball of a farsighted person is shorter than normal. Similarly, Presbyopia is attributable to physiological changes in the lens; however, Presbyopia is usually brought on by age. Corrective eyeglasses with convex lenses compensate for the refractive errors. Farsightedness can be corrected with glasses or contact lenses. Farsightedness can also be treated with refractive surgery.

Lazy Eye :
Amblyopia is more commonly known as Lazy Eye. Lazy Eye or Amblyopia is an eye condition characterized by reduced vision, which cannot be corrected by glasses or contact lenses.
Amblyopia is not caused by any eye disease. In this condition, the brain does not fully acknowledge the images seen by the Amblyopic Eye. Amblyopic almost always affects only one eye but in some instances may manifest itself with reduced vision in both eyes. The majority of Lazy Eye sufferers are young children. Amblyopia tends to occur most often during the first years of life when eye sight is still developing.

Both eyes must receive clear images during the critical early developmental period of eyesight (birth to six year). Anything that interferes with clear vision in either eye during this critical time can result in Amblyopia. The most common causes of Amblyopia are as follows:

Constant Atrabismus (constant turn of one eye)
Anisometropia (different vision/prescriptions in each eye)
Blockage of an eye due to trauma
Lid droop

is a neurological condition brought on by any one or more of the above causes. The brain will start to suppress or block the weak eye and this inhibition process can result in a permanent decrease in the vision in that eye that can not be corrected with glasses, lenses, or lasik surgery. Much of the time parents and children can be completely unaware of this condition, thus allowing the condition to continue to progress causing irreversible damage to occur.

Macular Degeneration :
Macular Degeneration is a common eye disease affecting millions of people across the globe. Macular Degeneration causes deterioration of the macula. The macula is the central area of the retina. The sharpest and clearest straight forward vision is processed by the macula. As more and more damage happens to the macula, a patient’s vision will start to develop more and more blind spots resulting in blurred or distorted vision. This process is known as Macular Degeneration.

Age-Related Macular Degeneration (AMD) is a major cause of visual impairment in the United States and for people over age 65 it is the leading cause of legal blindness among Caucasians. Macular Degeneration affects the central vision, but not the peripheral vision. As a result, Macular Degeneration doesn't cause total blindness. Consider the following initial signs of Macular Degeneration:

Need for more light to see close-up
Fine print may become harder to read
Street signs may become more difficult to recognize
Eventually straight lines may appear distorted or crooked
Gray or blank spots may appear in the center of your visual field

The condition of Macular Degeneration usually develops gradually, but in some instances may progress rapidly, leading to severe vision loss in one or both eyes. Consult with a doctor for diagnosis and treatment options.

Myopia :
Myopia or Nearsightedness occurs when light entering the eye focuses just before the retina instead of directly on the retina.
This is caused by either a steep cornea or an elongated eye. Nearsighted people typically see well at close distances; however, these same people will have difficulty seeing clearly at far distances.

In order to achieve proper eyesight, the cornea and the lens must properly focus or refract light onto the retina. When the shape or length of the eye is not ideal, the light may get focused either too early or too late. This leaves a blurred image on the retina, which is sent through the optic nerve to the brain for interpretation. Near-sightedness usually becomes progressively worse through adolescence and stabilizes in early adulthood. Myopia is an inherited problem.

Nearsightedness is detected with a vision test and refraction. Myopia is best treated with eyeglasses and contact lenses. However, refractive surgery is available as a treatment for Myopia.

Post a Comment

Previous Post Next Post