Common Vision Problems

The human eye has evolved over the years to become an extremely sophisticated organ that has the ability to process light and focus images. Essentially the eye uses a simple focusing mechanism that bends the reflected light from objects, focuses this light using the cornea and sharpens the focus by the use of the lens before forming the image on the retina at the back of the eye. If any of the focusing parts of the eye such as the cornea, lens or retina are not working well then the images formed might become blurred, hazy and very difficult to decipher. Therefore the root to understanding all vision problem lies in understanding how the eye interacts with light at all times regardless of distance, intensity or strength. This paper seeks to review important factors that can go a long way in ensuring that one chooses the suitable eye solutions and vision correction methods for them. 

Understanding prescriptions
At one time or another most of us have been driven to a doctor’s office with an annoying eye problem.  During these consultations the physicians tend to use complicated medical jargon that can leave even the sharpest of people hopelessly lost and confused. In this section a clear but simple method has been used to help anyone make sense of the doctor’s prescriptions without losing too much sleep and energy about it. In most cases prescriptions are usually fashioned depending on the catual error they seek to correct in an individual’s vision. Common eye problems include myopia, hyperopia, astigmatism, and presbyopia. While diagnosing a patient the physician uses a special gadget called a diopter that essentially records the light bending ability of any optical system like the eye. Once the eye test has been done the doctor then determines what is the appropriate number in diopters for the correcting glass to be used with nearsightedness being expressed as a negative (-) number and farsightedness as a positive (+). The following is a simple and straightforward prescription with accompanying meanings:

The -6.00 -1.60 x 135 represents a typical prescription to correct a common vision problem.

  • First Number:-6.00identifyan individuals’ degree of nearsightedness or farsightedness. The sign identifies whether one is nearsighted (- sign) or farsighted (+ sign).
  • Second Number: -1.60 identifies a patient’s degree of astigmatism. The number can be written either with a + sign or a – sign.
  • Third Number: 135identify the axis, which indicates the direction of a patient’s astigmatism. An axis of 135 degrees, for example, means the astigmatism is horizontal.

As such, a prescription of -6.00 -1.60 x 135 indicates that the patient is moderately nearsighted, with a moderate degree of astigmatism in a horizontal direction. 

Although eye correction and prescription making is a very sophisticated venture better left to qualified professional anyone can actually make basic sense of their prescription thus making the problem less intimidating. To learn more about this and many other useful tips about vision corrections visit theOptiView Vision Center website at anytime.