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遠視

File:Hypermetropia_color.svg · Wikimedia Commons · See Wikimedia Commons

EntityQ177254· pop 71· linked from 373 articles

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

AI overview

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

via PubMed

Article · 中文

远视(英語:Far-sightedness)是指平行光线经过眼的屈光介质在视网膜后聚焦的不正常状态。轻度远视的患者因为眼的调节功能大多不会有癥状。新生儿出生時基本上都是远视,但随着新生儿年龄的增长,遠視情況逐渐减少。6岁时有8%的兒童遠視,15岁时为1%。然而人類在40岁之后,遠視再次变得普遍,此時大约一半的人會遠視。40歲左右的轻度遠視患者因为调节功能下降會看不清远距離的事物;中度和重度的患者因为调节能力欠佳導致无论多近都看不清晰。 近視是相似但方向相反的情況。

Abstract from DBpedia / Wikipedia · CC BY-SA

Gallery (10)

遠視 · Vinony