We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Health

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What Are the Different Types of Myopia?

By Jennifer Long
Updated: May 17, 2024
Views: 7,491
Share

Myopia, otherwise known as short sightedness or nearsightedness, is one of the types of eye defects that can occur. The five main classifications for this condition are induced, degenerative, pseudomyopia, simple, and nocturnal. A classification of the condition is dependent on the severity and symptoms.

In terms of vision issues with notable symptoms, this condition is quite common. It is known as a refractive disorder. In a normal eye, light passes through the eye and the retina focuses that light. From the retina, the messages are sent to the optic nerve where the brain processes the signals into images. People with myopia see blurred images from a distance because the retina has not focused properly.

Induced, or acquired, myopia can be a result of several factors. Short sightedness can be caused by an excessive exposure to prescription medications. It can also be caused by nuclear sclerosis or increased glucose. The bands used to repair retinal detachments can stretch the length of the eye, also leading to short sightedness.

Degenerative myopia has an increased amount of refractive error. This category is progressive, which means it will worsen over time. In this case, the eye continues to enlarge and blurred vision increases. This is due to the growing distance between the outer eye and the retina.

Another type of myopia is pseudomyopia. This form is temporary and occurs when the ciliary muscle spasms. The ciliary muscle is the muscle in the eye that controls focusing abilities. Muscle spasms make natural or manual focusing abilities more difficult, resulting in blurred images in the distance.

Simple myopia is the most common form of this condition. The patient's eye is too long for the optical power it has. Genetics and environment can lead to the development of this form. It does not usually progress over time and is often easier to treat.

Nocturnal myopia is classified when a person has trouble seeing things far away when there is low lighting, but daytime vision is normal. Pupils dilate and constrict in response to light levels. When the pupils dilate to allow more light to come into the eyes, a distortion of images occurs.

Most cases of myopia can be treated. There are three methods used to correct this condition. Corrective lenses are special prescription glasses or contacts. Some people with more severe vision problems may also choose to undergo corrective surgery.

Share
WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Editors' Picks

Discussion Comments
Share
https://www.wisegeek.net/what-are-the-different-types-of-myopia.htm
Copy this link
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.