Learn About Nearsightedness

What is the definition of Nearsightedness?

Nearsightedness is when light entering the eye is focused incorrectly. This makes distant objects appear blurred. Nearsightedness is a type of refractive error of the eye.

If you are nearsighted, you have trouble seeing things that are far away.

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What are the alternative names for Nearsightedness?

Myopia; Shortsightedness; Refractive error - nearsightedness

What are the causes of Nearsightedness?

People are able to see because the front part of the eye bends (refracts) light and focuses it on the retina. This is the inside of the back surface of the eye.

Nearsightedness occurs when there is a mismatch between the focusing power of the eye and the length of the eye. Light rays are focused in front of the retina, rather than directly on it. As a result, what you see is blurry. Most of the eye's focusing power comes from the cornea.

Nearsightedness affects males and females equally. People who have a family history of nearsightedness are more likely to develop it. Most eyes with nearsightedness are healthy. However, a small number of people with severe nearsightedness develop a form of retinal degeneration.

The predominant wavelength of light in your environment may affect the development of myopia. Recent research suggests that more time outdoors may lead to less myopia.

What are the symptoms of Nearsightedness?

A nearsighted person sees close-up objects clearly, but objects in the distance are blurred. Squinting will tend to make far away objects seem clearer.

Nearsightedness is often first noticed in school-aged children or teenagers. Children often cannot read the blackboard, but they can easily read a book.

Nearsightedness gets worse during the growth years. People who are nearsighted may need to change glasses or contact lenses often. Nearsightedness most often stops progressing as a person stops growing in his or her early twenties.

Other symptoms may include:

  • Eyestrain
  • Headaches (uncommon)
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What are the current treatments for Nearsightedness?

Wearing eyeglasses or contact lenses can help shift the focus of the light image directly onto the retina. This will produce a clearer image.

The most common surgery to correct myopia is LASIK. An excimer laser is used to reshape (flatten) the cornea, shifting the focus. A newer type of laser refractive surgery called SMILE (Small Incision Lenticule Extraction) is also approved for use in the United States.

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What is the outlook (prognosis) for Nearsightedness?

Early diagnosis of nearsightedness is important. A child can suffer socially and educationally by not being able to see well at a distance.

What are the possible complications of Nearsightedness?

Complications may include:

  • Corneal ulcers and infections may occur in people who use contact lenses.
  • Rarely, complications of laser vision correction may occur. These can be serious.
  • People with myopia, in rare cases, develop retinal detachments or retinal degeneration.
When should I contact a medical professional for Nearsightedness?

Contact your health care provider if your child shows these signs, which may indicate a vision problem:

  • Having difficulty reading the blackboard in school or signs on a wall
  • Holding books very close when reading
  • Sitting close to the television

Contact your eye doctor if you or your child is nearsighted and experiences signs of a possible retinal tear or detachment, including:

  • Flashing lights
  • Floating spots
  • Sudden loss of any part of the field of vision
How do I prevent Nearsightedness?

It has been generally believed that there is no way to prevent nearsightedness. Reading and watching television do not cause nearsightedness.

During the Covid-19 pandemic of 2020, when most school-aged children were learning from home, there was an increase in the development of nearsightedness over what had been seen before. In the past, dilating eye drops were proposed as a treatment to slow the development of nearsightedness in children, but those early studies were inconclusive. However, there is recent information that certain dilating eyedrops used in certain children at just the right time, may decrease the total amount of nearsightedness that they will develop.

The use of glasses or contact lenses does not affect the normal progression of myopia -- they simply focus the light so the nearsighted person can see distant objects clearly. However, it is important to not prescribe glasses or contact lenses that are too strong. Hard contact lenses will sometimes hide the progression of nearsightedness, but vision will still get worse "under" the contact lens.

Visual acuity test
Normal, nearsightedness, and farsightedness
Lasik eye surgery - series - Normal anatomy
What are the latest Nearsightedness Clinical Trials?
Spectacle Lenses Visual Acuity Assessments Study

Summary: This is a two-arm parallel group, non-dispensing study. Participants will be existing active CYPRESS Extension (CPRO-1802-002) subjects. Subjects will undergo additional visual performance assessments.

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Comparison of Defocus Incorporated Multiple Segments® (DIMS®) Lenses Alone Versus Monofocal Lenses + Atropine 0.05% Eyedrops on the Evolution of Ocular Axial Length at 2 Years in Myopia Control in Children: Single-centre Prospective Randomised Controlled 1:1 Open-label Non-inferiority Study

Summary: Myopia is the most common refractive disorder in the world. Many strategies have been developed to control myopia in children. Among them, the instillation of low-concentration atropine eyedrops has been proven to be effective in numerous publications. Nevertheless, the spreading of atropine use is limited by: (1) its uneven availability, (2) a proportion of children with no or poor response, (3) ...

What are the Latest Advances for Nearsightedness?
Visual outcomes, spectacle independence, and patient satisfaction of pseudophakic mini-monovision using a new monofocal intraocular lens.
Cataract surgery in myopic eyes.
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The Effect of Orthokeratology Lens on the Axial Length of Globe in Children with Myopia in Asia.
Who are the sources who wrote this article ?

Published Date: August 22, 2022
Published By: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

What are the references for this article ?

Chia A, Chua WH, Wen L, Fong A, Goon YY, Tan D. Atropine for the treatment of childhood myopia: changes after stopping atropine 0.01%, 0.1% and 0.5%. Am J Ophthalmol. 2014;157(2):451-457. PMID: 24315293 pubmed.ncbi.nlm.nih.gov/24315293/.

Kanellopoulos AJ. Topography-guided LASIK versus small incision lenticule extraction (SMILE) for myopia and myopic astigmatism: a randomized, prospective, contralateral eye study. J Refract Surg. 2017;33(5):306-312. PMID: 28486721 pubmed.ncbi.nlm.nih.gov/28486721/.

Nischal KK. Ophthalmology. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 20.

Olitsky SE, Marsh JD. Abnormalities of refraction and accommodation. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 638.

Torii H, Ohnuma K, Kurihara T, Tsubota K, Negishi K. Violet light transmission is related to myopia progression in adult high myopia. Sci Rep. 2017;7(1):14523. PMID: 29109514 pubmed.ncbi.nlm.nih.gov/29109514/.

Wang J, Li Y, Musch DC, et al. Progression of myopia in school-aged children after COVID-19 home confinement. JAMA Ophthalmol. 2021;139(3):293-300. PMID: 33443542 pubmed.ncbi.nlm.nih.gov/33443542/.