Refractive Errors

What to Know About the Causes of Refractive Error and Its Correction

Refractive errors occur when the eye cannot properly focus light, causing blurry vision. Asian Eye offers expert diagnosis and personalized treatment to help you see clearly again.

Refractive Errors: What Are They and How Are They Treated?

Refractive errors are among the most common eye conditions, and Asian Eye Institute specializes in diagnosing and treating them with precision and care. Our doctors use state-of-the-art technologies to provide accurate assessments and personalized treatment plans. We can provide prescription glasses or surgery for your needs and budget, helping you achieve clear and comfortable vision.

What Is a Refractive Error?

Refractive errors occur when your eye cannot focus light properly on your retina, leading to blurred vision. This isn't a disease but rather an optical imperfection that prevents the eye from bending light accurately. Instead of focusing light directly on the retina, the light is focused in front of, behind, or unevenly across it. This mismatch between the eye's shape and its focusing power results in blurry vision.

Causes of Refractive Error

There are several refractive error causes that are primarily related to the unique anatomy of your eye:

  • Length of the Eyeball: If your eyeball is too long or too short, light won't focus correctly on the retina.
      • Long Eyeballs: Light focuses in front of the retina, causing nearsightedness (myopia).
      • Short Eyeballs: Light focuses behind the retina, causing farsightedness (hyperopia).Shape of the Cornea: The cornea is the clear, front surface of your eye. An irregularly shaped cornea leads to astigmatism, where vision is distorted at all distances.
  • Aging of the Lens: As you age, the natural lens inside your eye can lose its flexibility. This causes presbyopia, making it difficult to focus on close objects.
  • Genetics: Refractive errors often have a hereditary component, meaning they can run in families.
  • Environmental Factors: Prolonged near-work (like reading or screen time) has been suggested as a factor in the development or progression of myopia, especially in children and young adults.

Types of Refractive Error

There are several distinct types of refractive error:

 

Nearsightednesss (Myopia)

This common condition results in clear vision for nearby objects, but distant objects appear blurry. It occurs when the eyeball is too long or the cornea is too steeply curved, causing light to focus in front of the retina. This often develops during childhood and can progress through adolescence.

 

Farsightedness (Hyperopia)

Individuals with hyperopia can see distant objects clearly, but close-up objects appear blurry. This happens when the eyeball is too short or the cornea is too flat, causing light to focus behind the retina. Severe farsightedness can affect both near and distant vision.

 

Astigmatism

This is a type of refractive error where a person has distorted and blurred vision at all distances. It is caused by an imperfectly shaped cornea that prevents light from focusing properly on the retina. Instead of a single focal point, light scatters across multiple points, leading to ghosting or streaking of images.

 

Presbyopia

This is an age-related condition where the eye loses its ability to focus on nearby objects, making it difficult to read small text or perform close-up tasks. It becomes noticeable in early- to mid-40s and worsens with time, affecting nearly everyone as they age. It's caused by the hardening of the eye's natural lens, which prevents it from changing shape to focus on close objects.

Symptoms of Refractive Error

The refractive error symptoms you experience can vary depending on the type and severity of your condition. Common signs that you might have a refractive error include:

  • Blurred vision: This is the most common symptom, where objects appear out of focus.
  • Double vision (diplopia): Seeing two images of a single object.
  • Hazy or fuzzy vision
  • Squinting: Habitually narrowing your eyes to try and see more clearly.
  • Headaches: Often caused by eye strain from constantly trying to focus.
  • Eye strain or fatigue: Your eyes feel tired or achy after prolonged visual tasks.
  • Difficulty seeing at night: Especially problematic for driving.
  • Sensitivity to glare or bright lights

How Do You Treat Refractive Errors?

Regular eye exams are necessary to diagnose and manage refractive error symptoms properly and maintain clear and comfortable vision. Those with this condition can wear eyeglasses and contact lenses to improve their eyesight. They can also undergo surgery to permanently reshape the cornea, enhance visual acuity, and minimize their dependency on prescription lenses. Early detection and appropriate intervention are key to correcting these visual imperfections and improving daily life.

Refractive Error Solutions: Your Clear Vision Starts Here

Asian Eye Institute offers a comprehensive range of advanced treatments to effectively correct refractive errors. Beyond traditional prescription glasses and contact lenses, we specialize in state-of-the-art refractive surgeries such as LASIK, TransPRK, and PRK, which reshape the cornea for clearer vision. For suitable candidates, Implantable Collamer Lenses (ICL) provide an excellent alternative. Additionally, we offer Supracor for presbyopia correction and Orthokeratology (Ortho-K) for myopia control, providing tailored solutions for various visual needs.

an ophthalmologist doing a comprehensive eye exam

Comprehensive Eye Exam

LASIK and Other Refractive Surgeries

LASIK and Other Refractive Surgeries

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