Myopia vs Hypermetropia: Difference and Comparison

Myopia and Hypermetropia are two vision conditions of the eye in which objects at a certain distance range appear blurred to the person suffering from them.

A normal eye forms the image of the object on the retina. Still, a myopic eye and a hypermetropic eye form the image of the object in front of the retina and behind the retina, respectively.

Key Takeaways

  1. Myopia is a refractive error where close objects appear clear, but distant objects appear blurry.
  2. Hypermetropia is a refractive error where distant objects appear clear, but close objects appear blurry.
  3. Myopia is corrected with concave lenses, while hypermetropia is corrected with convex lenses.

Myopia vs Hypermetropia

Myopia is an eye vision condition. In myopia, a person can see things close to him/her but can’t see distant objects clearly. Myopia occurs due to an increase in the size of the eyeball. In hypermetropia, a person can see distant objects but can’t see the clear image of objects close to him/her. Hypermetropia occurs due to a decrease in the size of the eyeball.

Myopia vs Hypermetropia
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The distant objects appear to be blurred in the case of myopia. On the other hand, the nearby objects appear to be blurred in the case of hypermetropia.

Comparison Table

Parameters of ComparisonMyopiaHypermetropia
DefinitionThe person suffering from Myopia can see only near or short-distance objects.The person can suffer from Hypermetropia and see only far or distant objects.
Another NameNear or Short-sightednessFar or distant sightedness
Size of Eye BallThe size of the eyeball increases.The size of the eyeball decreases.
Formation of ImageThe image of the object is formed in front of the retina.The image of the object is formed behind the retina.
CausesThe two major reasons for myopia are:
1) Heredity
2) Exposure to sunlight
The three major reasons for Hypermetropia are:
1) Heredity
2) High blood pressure
3) Weak functioning of the ciliary muscle
SymptomsBlurred image of the distant objects.Blurred image of the near objects.
TreatmentWith the help of a concave lens (diverging lens) of negative refractive power.The focal length of the eye lens
Focal length of the eye lensThe focal length decreases of the eye lens.The focal length increases of the eye lens.

What is Myopia?

Myopia, called ‘Near sightedness,’ is a vision condition where the person can see only nearby objects. In this case, the distant objects appear to be blurred. The image is formed in front of the retina for a myopic eye.

It can be caused due to heredity, exposure to sunlight, the body’s circadian rhythms, and many more. The blurred image of distant objects can identify it. In the case of a myopic eye, the eyeball’s size increases.

The focal length of the eye lens decreases. The other effects of hypermetropia are retinal detachment, cataracts, glaucoma, etc.

The condition of Myopia can be divided into three types:

  1. Low myopia: The Refractive error is greater or equal to -3.00 D.
  2. Moderate myopia: The refractive error is less than -3.00 to -6.00 D.
  3. High myopia: The refractive error is less than -6.00 D.

A myopic eye can be corrected with the help of a concave lens (diverging lens). It has a negative refractive power that increases according to the severity of myopia.

myopia

What is Hypermetropia?

Hypermetropia, or ‘Far sightedness,’ is a vision condition where the person can see only distant objects. In this case, the nearby objects appear to be blurred. The image is formed behind the retina of a myopic eye.

It can be caused due to heredity, high blood pressure, weak functioning of the ciliary muscle, excessive curvature of the eye lens or elongation of the eyeball, and many more. The blurred image of the nearby objects can identify it. In the case of a hypermetropic eye, the eyeball’s size decreases.

The focal length of the eye lens increases. The other effects of hypermetropia are retinal detachment, glaucoma, amblyopia, strabismus, etc.

The condition of Hypermetropia can be divided into three types:

  1. Low hypermetropia: The refractive error is greater than or equal to +2.00 D.
  2. Moderate hypermetropia: The refractive error is less than +2.00 to +5.00 D.
  3. High hypermetropia: The refractive error is less than +5.00 D.

A hypermetropic eye can be corrected with the help of a convex lens (converging lens). It has a positive refractive power that increases according to the severity of myopia.

hypermetropia

Main Differences Between Myopia and Hypermetropia

  1. A person suffering from Myopia can see only short-distance objects. On the other hand, a person suffering from Hypermetropia can see only far or distant objects.
  2. Myopia is called Near or Short-sightedness, whereas Hypermetropia is known as Far or distant-sightedness.
  3. In the case of a Myopic eye, the eyeball’s size increases. In the case of a Hypermetropic eye, the eyeball’s size decreases.
  4. In Myopia, the focal length of the eye lens decreases, whereas in Hypermetropia, the focal length increases.
  5. In Myopia, the image of the object is formed in front of the retina, whereas in Hypermetropia, the image is formed behind the retina.
  6. Myopia is caused due to heredity, exposure to sunlight, and the body’s circadian rhythms. On the other hand, Hypermetropia is caused due to heredity, high blood pressure, and weak functioning of the ciliary muscles.
  7. In Myopia, the distant objects appear blurry, whereas in Hypermetropia, the nearby objects appear blurry.
  8. Myopia can be treated with the help of a concave lens of negative power. On the other hand, Hypermetropia can be treated with the help of a convex lens of positive power.
Difference Between X and Y 2023 04 19T122458.079
References
  1. https://www.ajo.com/article/0002-9394(55)91283-6/pdf
  2. https://www.sciencedirect.com/science/article/pii/S004269890900457X

Last Updated : 11 June, 2023

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10 thoughts on “Myopia vs Hypermetropia: Difference and Comparison”

  1. This article is really helpful for those of us who are strigling with vision problems. They are explained in detail and the comparison table is really useful. I’m following the information provided to me by my ophtalmologist and this article has helped me to understand better my condition.

  2. I think the article is very thorough in its coverage of the topic. It should serve as an informative piece for those seeking to understand the differences between Myopia and Hypermetropia.

  3. I think the article provide an accurate and detailed comparison of the two eye conditions. However, it would be better if it included more relatable information to connect better with the readers.

  4. I appreciate the thoroughness of the article in explaining the differences between Myopia and Hypermetropia. It offers a broad understanding of the topic, but I believe that it could be enhanced with a more engaging narrative to maintain the reader’s interest throughout.

  5. I can see that a lot of research and effort has gone into creating the comprehensive comparison between Myopia and Hypermetropia. But I feel it may have been made more engaging and relatable with the addition of some real life experiences from individuals with these conditions.

  6. It’s clear that the article is rich in information and comparative analysis of Myopia and Hypermetropia. Yet, I think it would benefit from integrating more relatable content and examples to anchor the concepts discussed.

  7. Avatar of Samantha Russell
    Samantha Russell

    While I have found the information in the article to be educational, the writing style seems a bit too complex for a general audience. I think the article would benefit from simplifying the language and providing more practical examples to clarify certain points.

  8. I found the comparison table to be the most useful part of the article. It clearly highlights the key differences between Myopia and Hypermetropia. It’s great to have all the information in one place, making it easier to understand.

  9. Avatar of Elsie Mitchell
    Elsie Mitchell

    I appreciate the comprehensive explanation given here, it’s really helpful for those looking for detailed information on these eye conditions. However, I think the article could be improved with more examples of real life situations and experiences of people with Myopia and Hypermetropia.

  10. While the article is informative, I feel that some of the terminology may be difficult for people without a background in ophthalmology to understand. It would be helpful to include more layman’s terms to ensure broader accessibility.

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