File:Hypermetropia_color.svg · Wikimedia Commons · See Wikimedia Commons
Also known as hypermetropia, far-sightedness
Far-sightedness, also known as long-sightedness, hypermetropia, and hyperopia, is a condition of the eye where distant objects are seen clearly but near objects appear blurred. This blur is due to incoming light being focused behind, instead of on, the retina due to insufficient accommodation by the lens. Minor hypermetropia in young patients is usually corrected by their accommodation, without any defects in vision. But, due to this accommodative effort for distant vision, people may complain of eye strain during prolonged reading. If the hypermetropia is high, there will be defective vision
Hyperopia, commonly called far-sightedness, is a condition where your eyes focus light behind the retina instead of directly on it, making nearby objects appear blurred while distant ones stay clear. It matters because while mild cases may go unnoticed due to your eye's natural focusing ability, severe hyperopia causes blurred vision and eye strain during close-up activities like reading.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Medical condition (new).name
- Hyperopia
- Medical condition (new).synonyms
- Hypermetropia, hyperopia, longsightedness, long-sightedness
- Medical condition (new).image
- Hypermetropia color.svg
- Medical condition (new).caption
- Far-sightedness without (top) and with lens correction (bottom)
- Medical condition (new).field
- Ophthalmology, optometry
- Medical condition (new).symptoms
- Near blur, Distance and near blur, Asthenopia
- Medical condition (new).complications
- Accommodative dysfunction, binocular dysfunction, amblyopia, strabismus
- Medical condition (new).causes
- Axial length of eyeball is too short, lens or cornea is flatter than normal, aphakia
- Medical condition (new).risks
- Ageing, hereditary
- Medical condition (new).diagnosis
- Eye exam
- Medical condition (new).differential
- Amblyopia, retrobulbar optic neuropathy, retinitis pigmentosa sine pigmento
- Medical condition (new).treatment
- Eyeglasses, contact lenses, refractive surgeries, IOL implantation
- Medical condition (new).frequency
- ~7.5% (US)
via Wikipedia infobox
Research
6,170 papers- [Refractive surgery for hyperopia].ReviewJournal francais d'ophtalmologie · 2021Delbarre M, Le HM, Boucenna W et al.DOI: 10.1016/j.jfo.2020.11.008
- Hyperopia: a meta-analysis of prevalence and a review of associated factors among school-aged children.BMC ophthalmology · 2014Castagno VD, Fassa AG, Carret ML et al.DOI: 10.1186/1471-2415-14-163
- [Research progress on influencing factors of hyperopia reserve in children].ReviewZhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi · 2022Zhao MY, Zhu Y, Xu SJ et al.DOI: 10.3760/cma.j.cn112338-20220420-00324
- Phakic intraocular lens implantation for the correction of hyperopia.ReviewJournal of cataract and refractive surgery · 2019Alshamrani AA, Alharbi SSDOI: 10.1016/j.jcrs.2019.05.051
- Infant hyperopia: detection, distribution, changes and correlates-outcomes from the cambridge infant screening programs.ReviewOptometry and vision science : official publication of the American Academy of Optometry · 2007Atkinson J, Braddick O, Nardini M et al.DOI: 10.1097/OPX.0b013e318031b69a
- The epidemiology of early childhood hyperopia.ReviewOptometry and vision science : official publication of the American Academy of Optometry · 2007Tarczy-Hornoch KDOI: 10.1097/OPX.0b013e318031b674
- Infant and child hyperopia.Optometry and vision science : official publication of the American Academy of Optometry · 2007Mutti DO, Candy R, Cotter SA et al.DOI: 10.1097/OPX.0b013e31803404bb
- Future Developments in SMILE: Higher Degree of Myopia and Hyperopia.ReviewAsia-Pacific journal of ophthalmology (Philadelphia, Pa.) · 2019Wang Y, Ma JDOI: 10.1097/01.APO.0000580128.27272.bb
via PubMed
Article · 日本語
遠視(えんし、英: Hyperopia)は、目の屈折異常のひとつで、遠方から眼内に入った平行光線が、を働かせていない状態で、網膜の後方に焦点を結ぶ状態をいう。軽度でも遠方視力に問題を生じる近視と違って、遠視は軽度ならば視力に問題を生じないことがある。なぜならば若いうちは目にピントを調節する能力があり、この調節力により表面上覆い隠すことができるからである。この調節力は近くにピントを合わせる方向にしか働かないので、遠視を覆い隠すことはできても近視を覆い隠すことはできない。遠視の弱く調節力の強い場合は遠くにも近くにもピントを合わせることができ、視力に問題を生じない。この場合、本人の自覚や学校で行われる視力検査では遠視であることが分からない。一方、遠視の強い場合、あるいは加齢などによって調節力が衰えた場合は近くが見にくくなる。さらに遠視の強い場合あるいはさらに調節力の衰えた場合は近くも遠くも見にくくなる。
Abstract from DBpedia / Wikipedia · CC BY-SA
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