The cornea is the eye’s outermost layer and characterized as the clear, dome-shaped tissue that covers the eye. This eye component plays a significant role in focusing your vision. In fact, the cornea is responsible for up to 75% of the eye’s total focusing power. Any irregularity in its shape, however, can lead to various refractive errors, like nearsightedness, farsightedness and astigmatism. Nonetheless, it’s worth mentioning that aging of the lens and the abnormal length of the eyeball can lead to these visual impairments.
A medical eye care specialist from Vision Care Associates answers the commonly asked questions about refractive errors.
What Is a Refractive Error?
Refraction is the process of bending light, in this case as it passes through the cornea and the lens. The light is then focused on the retina, which converts it into messages delivered to the brain. If the shape of the cornea, however, prevents light from focusing directly on the retina, a person may experience double vision, haziness, eye strain and other related symptoms.
Apart from irregularly shaped corneas, the length of the eyeball and aging of the lens may also affect the natural refraction process.
What Are Common Refractive Errors?
Refractive errors have four forms. Myopia, also known as nearsightedness, is a condition where objects up-close appear clearly while objects that are far away may seem blurry. People with hyperopia or farsightedness, on the other hand, may see objects clearer at a distance than up-close. If the eye does not focus light evenly on the retina, a patient may experience astigmatism. Lastly, presbyopia is an age-related condition that prevents the lens to change shape to focus on objects of variable distance.
Visit your local vision specialist for an eye exam to determine whether you have any of these refractive errors.
How Are Refractive Errors Treated?
Having a refractive error isn’t a hopeless case since there are many ways it can be treated. For instance, eye doctors may recommend using prescription eyeglasses or special contact lenses. For more permanent results, they may suggest refractive surgery.
Turn to your trusted eye doctor from Vision Care Associates to help address your eye health problems. Call us today at (304) 315-6055 or (304) 808-1209. You may also fill out our online form to schedule an appointment. We serve residents of Marrietta, OH.