A Quick Guide to Refractive Errors
- BY Dr. Steven Liem
- IN Eye Health
Photo by Gustavo Fring
Clear vision is essential for navigating the world around us, from reading signs to enjoying our favorite activities. However, many people experience blurry vision, which can affect their ability to see clearly at various distances. In this article, we’ll explore the main types of refractive errors.
Nearsightedness (Myopia)
Nearsightedness, or myopia, is a common refractive error characterized by difficulty seeing distant objects clearly while near vision remains relatively unaffected. Myopia occurs when the eyeball is too long or the cornea is too steep, causing light to focus in front of the retina instead of directly on it. Symptoms of myopia include difficulty seeing objects far away and squinting to see in the distance.
Farsightedness (Hyperopia)
Farsightedness, or hyperopia, is a refractive error that affects near vision more than distance vision. It occurs when the eyeball is too short or the cornea is too flat, causing light to focus behind the retina instead of directly on it. Symptoms of hyperopia include difficulty focusing on close objects and eye fatigue with reading.
Astigmatism
Astigmatism is a common refractive error caused by an irregularly shaped cornea or lens, which prevents light from focusing evenly on the retina. As a result, individuals with astigmatism may experience blurred or distorted vision at all distances. Symptoms of astigmatism include distorted vision and lights at night may appear like halos or starbursts.
Photo by Andrea Piacquadio
Presbyopia
Presbyopia is an age-related refractive error that affects near vision, typically occurring around the age of 40-45 years old. It occurs when the natural lens of the eye loses its elasticity, making it difficult to focus on close objects. Symptoms of presbyopia include difficulty reading small print, eyestrain, and headaches.
Refractive errors can impact our quality of life, but they are highly treatable with the right approach. Whether you’re nearsighted, farsighted, have astigmatism, or presbyopia, Zenni offers a wide range of stylish and affordable glasses to suit your needs. With the right prescription lenses, you can enjoy clear vision and experience the world with confidence.
