A person with normal vision is said to have visual acuity or what is more commonly referred to as 20/20 vision. This definition is not an indication of perfect vision, but simply sets the standard for vision testing. When a person is said to have 20/20 vision, they are able to see at 20 feet what a person with normal vision can also see at 20 feet of distance. To further this example, if a person is said to have 20/50 vision, this means that they must be as close as 20 feet to see what a person with normal vision can see at 50 feet of distance. When gauging the visual ability of a person, other factors must be taken into account. These additional factors can include eye coordination, the ability to focus and depth perception. Peripheral awareness, also known as side vision, can also be taken into account when determining visual ability.
There are two common problems that arise with the visual ability of many individuals. Some are able to see objects clearly from a distance, but will have more difficulty focusing on an object that is closer to them. This condition can be caused by two factors. The first is commonly known as farsightedness or hyperopia. The second cause is the loss of the ability to focus, also known as presbyopia. On the other end of the spectrum is nearsightedness or myopia. This condition signals the ability to see objects at close range, while having difficulty seeing objects that are at a greater distance from the viewer.
If you are in Texas, you may wish to consider visiting an eye specialist Houston trusts, in order to determine the state of your vision. A doctor that specializes in optometry will be able to perform a comprehensive eye examination that will detail any problems you may be having with your vision. A professional eye specialist will be able to prescribe glasses or contact lenses if these will help to improve your vision. The doctor may also recommend a program of vision therapy that can help and improve any conditions that are noted. There are alternative treatments and many forms of ocular medication that can be used if it is determined that the loss of vision is being caused by an eye disease.
An eye specialist Houston professional such as Dr. Goosey will perform a psychophysical procedure that will help to determine your level of visual acuity. A basic eye chart can be used to test this ability, along with computerized testing and the use of optical instruments.
One of the most common causes of lesser visual acuity is ametropia or refractive error. This condition signals that there are errors in the way that light is refracted when it enters the eyeball. The most common cause of this error is either the shape of the eye, the shape of the cornea or the reduction in the flexibility of the actual lens.
If you feel that you may be suffering from reduced vision, then make an appointment with Dr. Goosey today!