Understanding and Addressing Refractive Errors for Better Vision
What are refractive errors?
Thank you for supporting World Diabetes Month! Ready for some exciting content? As promised, we've got a complete marketing campaign ready for download. Before we do that, let's take a quick look at what's included.
Discover the power of EMDPro and take the next step toward marketing success.
What are refractive errors?
There are four common types of refractive errors:
- Nearsightedness (Myopia) causes far-away objects to appear blurry. Symptoms include squinting of eyes to focus on a subject or object, eye strain, and excessive blinking.
- Farsightedness (Hyperopia) causes nearby objects to appear blurry. Symptoms include difficulty in activities, such as reading or stitching, and persistent headaches.
- Astigmatism can cause far-away and nearby objects to appear blurry or distorted. Eyestrain headaches, or uncomfortable and tired eyes are common symptoms.
- Presbyopia makes it challenging for middle-aged and older adults to see things up close - for example, when embroidering. It can cause eye strain or headaches.
What causes refractive errors?
Various factors contribute to refractive errors, including the length of the eyeball—whether it elongates or shortens. The shape of the cornea, the transparent outer layer of the eye, also plays a significant role in causing these errors. Additionally, the aging process of the lens, an inner component responsible for maintaining clarity and aiding in focusing, contributes to the development of refractive errors.
Managing refractive errors?
Your eye doctor actively determines your refractive error using a test called refraction. This is done with a computerized instrument (automated refraction) or a phoropter for manual refraction, where one lens is shown at a time.
Usually, the doctor's staff performs an automated refraction, and the eye doctor then refines and verifies the results manually. The refraction identifies multiple refractive errors contributing to blurred vision, like nearsightedness and astigmatism. Using the refraction results, your eye doctor prescribes eyeglasses. However, refraction alone isn't enough for a contact lens prescription, and a fitting is needed. Eyeglasses and contact lenses are made with precise curves to correct refractive errors and focus light on the retina.
A specialized ophthalmologist can perform vision correction surgeries - for example, laser-assisted in situ keratomileusis (LASIK). LASIK changes the cornea's shape to bring light to a more accurate focus on the retina. Your doctor will refer you to this procedure if they feel it is the best treatment for you.
If you experience any of these symptoms, schedule an appointment with your optometrist. Your eye doctor can effectively manage refractive errors, eliminating the need for ongoing discomfort. Detecting vision problems early helps prevent serious issues in the future.